Category: Mechanical
Posted by: Derek
Parts needed:
- Fuel pump
- Fuel screen
- Hoses
- and any other part you wish to replace while you are 'in there'. Refer to DMC part diagram 2-1-0
Tools needed:
- Flat / phillips screwdrivers
- 7mm, 8mm, 10mm, 19mm socket & wrenches
- Torque wrench
- Adjustable wrenches
- Shop towels
- Siphon
- Bucket or empty jugs
- Acetone
- Long screw driver and duct tape recommended
First, empty your luggage compartment, remove spare tire, remove access plate to fuel tank.
Remove clamp around boot. Remove top boot so you have access to the fuel lines off the return line and pump. Remove return line and pump line. It is recommended that you label these if you are unfamiliar with their orientation. Wipe up dispensed gas and push aside. Take long screwdriver and duct tape siphon hose onto the end. Stick in tank in sender hole. Depending on the length of your siphon hose you may need to route it behind the passenger wheel well and around the A/C accumulator.
Pump gas out of tank until empty. If gas is clean you can store in a container for lawn mower, generator, etc. If gas is bad you should dispose of it properly. Now unplug fuel pump and lift boot out of tank. Remove the two hoses attached to pump and return line. Check to see if there is any remaining fuel now that you have better tank access and remove if present.
Using 10mm socket or wrench disconnect pickup unit in tank. You will have to take it apart in the tank and remove it a piece at a time. Be careful this is old plastic that has sat in fuel for 27+ years. Use shop cloths and acetone to clean the baffle. Here is a dirty baffle and a dirty tank:
And a cleaned upper part of the baffle:
Use shop rags to remove any remaining gas and clean up as much residue in the tank. Once you have removed as much as possible, pour in acetone and use rags to clean and wipe down the inside of the tank. To reach in you will most likely need to 'ride' the passenger side fender:
Once acetone has dried, reassemble the baffle in the tank. It should sit between the grooves toward the drivers side of the tank. Make sure to set up the springs the same way they were when you removed the baffle. Once finished it should look like this:
Reassemble in the same order you removed items. It is recommended while you are in there to replace all clamps/hoses/etc. When installing the new pump, the torque setting for the dome nut on the pump banjo bolt is 11 ft/lbs. It should be a 19mm nut. The positive connection nut on the pump is 7mm and the negative is 8mm. When replacing the pump and boot, be sure not to kink the pickup line. It is best to use the sender hole at this point to make sure you have everything installed and not kinked.
Finally, reconnect fuel line and return line, replace boot, clamps, and you are set. You should put a few gallons of fresh gas in the car now, then fill the tank up to max and check for any leaks.
- Fuel pump
- Fuel screen
- Hoses
- and any other part you wish to replace while you are 'in there'. Refer to DMC part diagram 2-1-0
Tools needed:
- Flat / phillips screwdrivers
- 7mm, 8mm, 10mm, 19mm socket & wrenches
- Torque wrench
- Adjustable wrenches
- Shop towels
- Siphon
- Bucket or empty jugs
- Acetone
- Long screw driver and duct tape recommended
First, empty your luggage compartment, remove spare tire, remove access plate to fuel tank.
Remove clamp around boot. Remove top boot so you have access to the fuel lines off the return line and pump. Remove return line and pump line. It is recommended that you label these if you are unfamiliar with their orientation. Wipe up dispensed gas and push aside. Take long screwdriver and duct tape siphon hose onto the end. Stick in tank in sender hole. Depending on the length of your siphon hose you may need to route it behind the passenger wheel well and around the A/C accumulator.
Pump gas out of tank until empty. If gas is clean you can store in a container for lawn mower, generator, etc. If gas is bad you should dispose of it properly. Now unplug fuel pump and lift boot out of tank. Remove the two hoses attached to pump and return line. Check to see if there is any remaining fuel now that you have better tank access and remove if present.
Using 10mm socket or wrench disconnect pickup unit in tank. You will have to take it apart in the tank and remove it a piece at a time. Be careful this is old plastic that has sat in fuel for 27+ years. Use shop cloths and acetone to clean the baffle. Here is a dirty baffle and a dirty tank:
And a cleaned upper part of the baffle:
Use shop rags to remove any remaining gas and clean up as much residue in the tank. Once you have removed as much as possible, pour in acetone and use rags to clean and wipe down the inside of the tank. To reach in you will most likely need to 'ride' the passenger side fender:
Once acetone has dried, reassemble the baffle in the tank. It should sit between the grooves toward the drivers side of the tank. Make sure to set up the springs the same way they were when you removed the baffle. Once finished it should look like this:
Reassemble in the same order you removed items. It is recommended while you are in there to replace all clamps/hoses/etc. When installing the new pump, the torque setting for the dome nut on the pump banjo bolt is 11 ft/lbs. It should be a 19mm nut. The positive connection nut on the pump is 7mm and the negative is 8mm. When replacing the pump and boot, be sure not to kink the pickup line. It is best to use the sender hole at this point to make sure you have everything installed and not kinked.
Finally, reconnect fuel line and return line, replace boot, clamps, and you are set. You should put a few gallons of fresh gas in the car now, then fill the tank up to max and check for any leaks.
02/09: Engine Bay Complete
Here are some completed pics with my engine back together, new nuts & bolts installed, A/C compressor in, hoses cleaned, engine bay painted, etc, etc...
26/08: Engine Bay Repaint
One 'defect' with my car that has bothered me was that my engine bay was looking very worn for such a low mileage car. I don't know if it was just from past owner neglect, but it was getting under my skin. Some areas were flat, some were lighter grey, some were shiny black. Everything else in the engine compartment looked nice, but the bay just ruined it.
So I spent several hours over the course of a week getting the engine disassembled, parts removed from the walls, hoses tied up to the center block, etc etc to get easier access to the engine bay walls. I wanted to get this cleaned and fixed.
There are two ways to clean up the engine bay. The first is to use acetone and wipe down the walls. This may sound strange, but the fiberglass has a gelled outer layer that acetone does not harm. When wiping it down it results in a shiny look which also shows the natural grain of the fiberglass. I tried it in sections and while it looked nice, I wasn't sure if I wanted to continue it to the upper pontoon under the windows, and if not, didn't think I would like the difference between the bay and the upper pontoon.
So I spent another eight hours in one day wetsanding, cleaning, and taping/masking the engine bay. Finally the first coat of paint went on yesterday. Here are some pictures with the original as a comparison. I am using SEM Trim Black for this.
So I spent several hours over the course of a week getting the engine disassembled, parts removed from the walls, hoses tied up to the center block, etc etc to get easier access to the engine bay walls. I wanted to get this cleaned and fixed.
There are two ways to clean up the engine bay. The first is to use acetone and wipe down the walls. This may sound strange, but the fiberglass has a gelled outer layer that acetone does not harm. When wiping it down it results in a shiny look which also shows the natural grain of the fiberglass. I tried it in sections and while it looked nice, I wasn't sure if I wanted to continue it to the upper pontoon under the windows, and if not, didn't think I would like the difference between the bay and the upper pontoon.
So I spent another eight hours in one day wetsanding, cleaning, and taping/masking the engine bay. Finally the first coat of paint went on yesterday. Here are some pictures with the original as a comparison. I am using SEM Trim Black for this.
The A/C accumulator (also know as the dryer) removes the moisture, oils, and liquids from the AC system after it leaves the evaporator before returning to the compressor, sending back only the coolant as a vapor. Liquid coolant will have a chance to return to vapor form, and any oils that escaped from the compressor will be captured.
Replacement of this part should be done when any major A/C work is being done to the system, for example when the system has been evacuated and opened, especially when the system is 25+ years old. In my case I am fixing a leak in the low pressure switch and compressor, and wanted to replace it while working on the system.
A major problem however is when removing the A/C accumulator, the brass evaporator pipe has to be disconnected. This is a very delicate piece that is generally broken when attempting to remove the accumulator. Breaking this pipe means replacing the evaporator, which results in tearing apart your dash and interior to get at it. A long and unwelcome job.
Like everyone who thinks they can do it without breaking anything, I jumped in and thought "Eh, I'll get it done right, no problem" however when I started to crank on the evaporator pipe, my fears worsened as it was not budging and flexing the pipe too much for my liking. Thus began my 'unorthodox' attempt to remove the accumulator.
Tools:
- 2 large vice grips or adjustable wrenches (I used and prefer vice grips)
- Dremel
- Reinforced cutting disks
- Some sort of 'protector' plate (described in more detail below)
Safety equipment:
- Goggles or protective glasses
- Breathing mask (painters mask)
- Earplugs
Additional:
- Steady hand & firm grip
This how-to assumes that you have removed the high pressure line from the evaporator, the return line from the accumulator, and the low pressure switch from the accumulator, leaving only the evaporator <-> accumulator connection in place (which we are now going to remove). It also assumes your passenger tire is removed and car is elevated for easier access.
Tip: I took cut up plastic bags and wrapped the open hoses from the A/C system and twist-tied them to protect them from any dust/debris that will be flying around.
Tip: I also began spraying down the nut with PB blaster 48 hours in advance, twice a day. This allowed it to soak and hopefully make removal of the line easier.
Step 1: Begin cutting with the dremel on the accessible side of the A/C accumulator. You want to make as wide and as long of a cut as possible of the side and as much as the bottom as can be done. It is best before starting to remove the bracket that holds the accumulator to the fiberglass so its only held in place by the evaporator. I removed the trunk access panel and put vice grips on the accumulator large nut where the evaporator ties in to help secure it from movement. Attempt to cut as little as possible into the accumulator as the filter inside is filled with little pellets, if you cut it open you'll make a bit of a mess. When finished you should have this:
Step 2: Cut off pipe as high up as possible and remove the plastic innard. IMPORTANT - now take a shop rag and reach up into the open evaporator. Plug the evaporator hole as good as possible to keep any dust/debris from entering the open A/C system.
Step 3: You want to keep cutting down until you only have the 'nut' part remaining on the evaporator pipe. Be careful at this point because a few inches behind you are the fuel lines. This is where the 'protector plate' comes into play as well as a steady hand. I used a thick tupperware lid as a shield behind where I was cutting. I could push it back with one hand while using the other hand to cut. Try to make as shallow of cuts as possible to only cut through and not any deeper than the metal. As you go you'll then have this:
Step 4: Cut off the remaining metal until all that is left is the nut on the evaporator line. Remove as much excess metal as possible. It should look like this when you are finished cutting:
Step 5: Spray again with some PB Blaster and allow to sit. Use vice grips from under the car and place one on the nut and one on the evaporator line. Hold the evaporator line still while turning the accumulator remaining 'nut'. I placed both grips almost parallel with each other and squeezed. It came off with very little force and no flexing of the evaporator line:
Disclaimer: This is my method of removing the accumulator. I take no responsibility for any damage that may result from following this walkthrough. Be aware, any work done is at your own risk.
Replacement of this part should be done when any major A/C work is being done to the system, for example when the system has been evacuated and opened, especially when the system is 25+ years old. In my case I am fixing a leak in the low pressure switch and compressor, and wanted to replace it while working on the system.
A major problem however is when removing the A/C accumulator, the brass evaporator pipe has to be disconnected. This is a very delicate piece that is generally broken when attempting to remove the accumulator. Breaking this pipe means replacing the evaporator, which results in tearing apart your dash and interior to get at it. A long and unwelcome job.
Like everyone who thinks they can do it without breaking anything, I jumped in and thought "Eh, I'll get it done right, no problem" however when I started to crank on the evaporator pipe, my fears worsened as it was not budging and flexing the pipe too much for my liking. Thus began my 'unorthodox' attempt to remove the accumulator.
Tools:
- 2 large vice grips or adjustable wrenches (I used and prefer vice grips)
- Dremel
- Reinforced cutting disks
- Some sort of 'protector' plate (described in more detail below)
Safety equipment:
- Goggles or protective glasses
- Breathing mask (painters mask)
- Earplugs
Additional:
- Steady hand & firm grip
This how-to assumes that you have removed the high pressure line from the evaporator, the return line from the accumulator, and the low pressure switch from the accumulator, leaving only the evaporator <-> accumulator connection in place (which we are now going to remove). It also assumes your passenger tire is removed and car is elevated for easier access.
Tip: I took cut up plastic bags and wrapped the open hoses from the A/C system and twist-tied them to protect them from any dust/debris that will be flying around.
Tip: I also began spraying down the nut with PB blaster 48 hours in advance, twice a day. This allowed it to soak and hopefully make removal of the line easier.
Step 1: Begin cutting with the dremel on the accessible side of the A/C accumulator. You want to make as wide and as long of a cut as possible of the side and as much as the bottom as can be done. It is best before starting to remove the bracket that holds the accumulator to the fiberglass so its only held in place by the evaporator. I removed the trunk access panel and put vice grips on the accumulator large nut where the evaporator ties in to help secure it from movement. Attempt to cut as little as possible into the accumulator as the filter inside is filled with little pellets, if you cut it open you'll make a bit of a mess. When finished you should have this:
Step 2: Cut off pipe as high up as possible and remove the plastic innard. IMPORTANT - now take a shop rag and reach up into the open evaporator. Plug the evaporator hole as good as possible to keep any dust/debris from entering the open A/C system.
Step 3: You want to keep cutting down until you only have the 'nut' part remaining on the evaporator pipe. Be careful at this point because a few inches behind you are the fuel lines. This is where the 'protector plate' comes into play as well as a steady hand. I used a thick tupperware lid as a shield behind where I was cutting. I could push it back with one hand while using the other hand to cut. Try to make as shallow of cuts as possible to only cut through and not any deeper than the metal. As you go you'll then have this:
Step 4: Cut off the remaining metal until all that is left is the nut on the evaporator line. Remove as much excess metal as possible. It should look like this when you are finished cutting:
Step 5: Spray again with some PB Blaster and allow to sit. Use vice grips from under the car and place one on the nut and one on the evaporator line. Hold the evaporator line still while turning the accumulator remaining 'nut'. I placed both grips almost parallel with each other and squeezed. It came off with very little force and no flexing of the evaporator line:
Disclaimer: This is my method of removing the accumulator. I take no responsibility for any damage that may result from following this walkthrough. Be aware, any work done is at your own risk.
11/08: The Summer Job (Round 1)
Category: Maintenance
Posted by: Derek
Current work underway:
- Replace slow leaking A/C compressor
- Replace accumulator, low pressure switch, and orifice tube
- Paint engine compartment walls
- Replace rusted bolts/nuts with stainless
- Hide wire bundle under manifold
- Paint engine cover hinges
- Clean engine/engine compartment
- Pressure test A/C and refill with R12
So far I have removed the old compressor, disconnected some A/C lines up front, removed everything from the walls of the engine compartment, started cleaning, and purchased some stainless hardware. Next up is the sanding/painting of the compartment.
- Replace slow leaking A/C compressor
- Replace accumulator, low pressure switch, and orifice tube
- Paint engine compartment walls
- Replace rusted bolts/nuts with stainless
- Hide wire bundle under manifold
- Paint engine cover hinges
- Clean engine/engine compartment
- Pressure test A/C and refill with R12
So far I have removed the old compressor, disconnected some A/C lines up front, removed everything from the walls of the engine compartment, started cleaning, and purchased some stainless hardware. Next up is the sanding/painting of the compartment.
Category: Electrical
Posted by: Derek
After arriving home from DMC Florida and turning off the car, the frequency valve 'stuck' in the on position. Diagnosed the problem as my RPM relay sticking (completing the circuit). As this is my second RPM relay problem in the past two years (my other was the car dying out on the highway) I decided to go with the solid state RPM relay offered by Dave (Bitsyncmaster) on DMCTalk.com.
Take a look at this picture comparing the two, and read Ozzies great review on the relay upgrade here.
Take a look at this picture comparing the two, and read Ozzies great review on the relay upgrade here.
Went down to DMC Florida yesterday to get my unsightly Previous Owner body wound fixed. At some point my PO must have dropped something onto the door's A-pillar side frame and put a nice crease in it. I have a few other small blemishes on the car but this by far stood out when you walked down the passenger side. Saw Stephen at the Celebration Exotic show a few years ago and he had said that DMC had a technique to remove these types of dents now without going in from behind, which is impossible with this pillar as it is boxed in. The technique consists of a spot weld type wand with a pad and arm on the tip. The pad sits on the car on one end of the arm, and midway down the arm is the tip welder which you then use the arm as leverage to 'lift' the dent up. It was quite interesting to say the least.
So I met up with Skip and Kevin @ DMC Florida a little after 9am. Kevin got to work on the car and within 2 hours my dent was gone. It was very interesting to watch him work, and it came out flawless. Now I want to start saving up some cash so I can get the other marks in my car cleaned up as well! I wanted to thank Kevin and Skip for coming out on Saturday to work on my car. Its nice to have the option of the shop being open on Saturday to make it easier for us owners in Florida who work during the week and just need 'while you wait' type work. Kevin was fantastic with the metal work, take a look at the before and after pictures below.
BEFORE:
AFTER:
So I met up with Skip and Kevin @ DMC Florida a little after 9am. Kevin got to work on the car and within 2 hours my dent was gone. It was very interesting to watch him work, and it came out flawless. Now I want to start saving up some cash so I can get the other marks in my car cleaned up as well! I wanted to thank Kevin and Skip for coming out on Saturday to work on my car. Its nice to have the option of the shop being open on Saturday to make it easier for us owners in Florida who work during the week and just need 'while you wait' type work. Kevin was fantastic with the metal work, take a look at the before and after pictures below.
BEFORE:
AFTER:
Category: Mechanical
Posted by: Derek
Tools:
2 - 13mm box wrenches
7mm socket wrench (small)
17mm socket wrench
17mm box wrench
2 2x6 boards
Small & Large phillips screwdriver
Hammer
Socket Extension
Vice Grips
Marker (sharpie fine point)
New Bushing (used Tobys Delrin remanufactured replacement)
A Helper (preferrably a petite person, will be needed toward the end)
Steps:
(1) Jack up car, remove driver wheel, prop some wood under passenger wheel, set car down with passenger wheel up on wood and the underside supported by a jackstand on the drivers side of the front frame. This helped keep some weight on the steering rack and make the wheel stay in one place for the most part.
(2) Get on your back in the drivers footwell. Remove the seat if you want (I didn't). Remove the steering wheel surround. Remove the kneepads. Unhook wiring from the steering column (3 plugs). You now have two brackets hanging down from where the kneepads were connected. Bend these up and to the rear of the car. They bend back, but they need to be out of the way for reinstall anyway, so make it easier on yourself now.
(3) Get back out of the car and crawl under the front/side. Look up and you'll see where the column comes through the firewall to the u-joint. Remove the bolt that goes through the u-joint.
(4) Get back in the car, pull the seat forward a bit (if you removed the seat, your going to need help now). Remove the two bolts holding the column into the dash. Drop the column down onto the seat. Get out and start giving it a tug to begin pulling it out of the u-joint.
(5) Get back under the car, use the pen to mark where it is coming out of the u-joint. I marked where the splines were 'open' (not covered by the u-joint, where it compresses) so I could see them easier upon reinstall.
(6) I had to go back and fourth at this point, pounding with my palm on the u-joint connection and then in the car giving small tugs. I found it easier to use vice grips on the inner column on the inside of the car to help finish pulling it off the u-joint. Once disconnected remove the column from the car.
(7) Time to install the new bushing. I have seen comments on the board that the new bushing needs to be 'pulled' into the firewall. I had no problems just pounding it in place. Pushed in with my fingers, grabbed a socket and an extension, placed the socket around the bushing (used a towel as padding) and pounded it in. Took some force but popped in without a problem.
(8) Cleaned the unmarked splines off the steering column connection point and drew my marks darker. Now you'll need help. With vice grips around the inner column where it sticks out of the outer column, put the column back in the car and have a helper sit in the seat and lift the column up. Line it up and begin feeding it through the bushing.
(9) Now start to use some force, the inner column will begin to be pushed by the outer column, but be careful not to collapse the outer column cage. I had the helper push on the wheel while I pushed on the vice grips. It fed through with some force. Go slowly at this point and hop back under the car to feed it correctly into the u-joint. If you push it all the way through you'll need to feed it back a bit in order to get it back in the u-joint.
(10) Now that you have started to get it in the u-joint, just keep feeding it through and readjusting until it has reseated itself. It needs to go all the way in, as that 'curve' cutout in the splines is where the bolt holds it in place. Slide the bolt in the u-joint before rebolting the column to the dash. Give your helper some thanks and get back in the car to start the reassembly.
12/04: The 'Often Delayed' Update
Haven't worked on much in the last several months at all. The previous time I dug deep in to something on the car was back in September when the coolant system got an overhaul. The DeLorean has mostly sat in the garage awaiting the start of small jobs. And then it waited a bit longer.
Well the annual Celebration Exotic show is coming up, and I wanted to get a few things tackled before then. First off was the valve covers. I wanted to paint them, redo the seals which were leaking a bit and poorly done, and adjust the valves. That job has been completed, and below is a pic of the valve covers while being painted. Fully installed pictures will come later.
Second, I wanted to redo the outer door seals that have been in a box for the last year and a half. In doing that I also wanted to paint the window trim which was rubbed off in spots. The window trim is back on but the seals are still being installed. A picture of the window trim painting is also below.
That may be the extent prior to the show, but on the list to do still is painting the engine bay, touching up the front frame rust, and fixing the A/C system. The A/C has a small leak at the compressor clutch, so the compressor and accumulator will be replaced, along with the low pressure switch, and the system will be flushed/refilled.
Well the annual Celebration Exotic show is coming up, and I wanted to get a few things tackled before then. First off was the valve covers. I wanted to paint them, redo the seals which were leaking a bit and poorly done, and adjust the valves. That job has been completed, and below is a pic of the valve covers while being painted. Fully installed pictures will come later.
Second, I wanted to redo the outer door seals that have been in a box for the last year and a half. In doing that I also wanted to paint the window trim which was rubbed off in spots. The window trim is back on but the seals are still being installed. A picture of the window trim painting is also below.
That may be the extent prior to the show, but on the list to do still is painting the engine bay, touching up the front frame rust, and fixing the A/C system. The A/C has a small leak at the compressor clutch, so the compressor and accumulator will be replaced, along with the low pressure switch, and the system will be flushed/refilled.
22/01: Car on a lift
The DeLorean Club of Florida (http://www.deloreanclubfl.com) had a tech day this weekend with a lift. Was able to get the car put up to investigate with a much better perspective than crawling around on my back like usual. Here are some pics.
