'74 164 (T)E Conversion

AdrianH · 2021-01-23T07:15:43+00:00

Looking forward to seeing this project progress, and hope I can convince you to take some spare parts or a car (or three) out of my driveway! :)

AdrianH

Had the spare pump tested today at an Auto Electrician. The pump is fine and tries to turn but it was suggested that the internals have been clogged up with old fuel sitting for some time. When I am next home will look at opening it up and seeing if it can be cleaned.

AdrianH

Took apart the spare pump as much as easily possible and it runs but still blocked up and not passing any fluids. Used a fuel system cleaner to clear but no luck.

As the car has sat with me for a couple of years, I was thinking the whole fuel system could be gummed up through the car. Started to remove the whole system starting at the tank. Though there was only a small amount of fuel in the tank, but it turned out to be nearly 40l and it was a yellow color!

Testing the pump direct to a battery was not running but after a light tap with a hammer on the body fuel was spraying out everywhere. All from the tank through to the engine has been removed and will flush out, clean up the tank and replace all the rubber lines. A lot of these had gotten brittle and the outer layer was crumbling off.

Next will be remove the system from the engine and flush out.

OldnDecrepit

Didn't have to go through all that as mine was still on the road running. Keep up the good work.

Major Ledfoot

If the car's been sitting for a while, the tank internal fuel feed pipe sometimes gets a rust pinhole at the level where the water floated to the top of the fuel. Which means you can have a half full tank, but the pump is sucking air. These tanks also had a in-tank filter, which is accessed via the huge brass plug with the square socket-like cavity at the bottom of the tank. It's a real mongrel to remove.

Dr DJet talks fuel pumps - https://jetronic.org/en/d-jetronic/fuel-pump#Pumpe

AdrianH

@Major Ledfoot, thanks for the advice on the tank internals and feed pipe. When the level sender was removed there was a lot of rusty build up on it while the float arm moves freely.

I was aware of the internal filter, was going to look at replacing but not yet removed. Sounds like this will be fun to get out!

Planning on running a three-stage treatment for the internal part of the tank. If the feed pipe has holes is this replaceable or time for new tank?

Major Ledfoot

^ While P1800 replacement tanks are available new, direct OE type 140/164 pre-74 tanks are not.

Some US 140/164 owners have gone with a modified Mustang tank, but the solution might be getting a radiator place to open it up and clean it out. That's the plan for my spare tank for my 73 144; there's a shop here in LST which did an excellent job on a 240 tank for me.

carnut222

I have a couple 164 tanks that may be usable if you get stuck, but I thought the 74 would have the same style tank as a 240...or is yours the one that has the tank in the boot floor?

Major Ledfoot

carnut222
I have a couple 164 tanks that may be usable if you get stuck, but I thought the 74 would have the same style tank as a 240...or is yours the one that has the tank in the boot floor?

Pre-73 are in-boot-floor. 74+ are 240 style.

carnut222

Major Ledfoot
https://ozvolvo.org/discussion/comment/213354#Comment_213354
Pre-73 are in-boot-floor. 74+ are 240 style.

Yep, I was just a bit unclear as to the actual year model that Adrian has. The thread says 74 so if that's the case, it won't have the brass bung in the bottom or the metal pick-up tube like the 1800, right? Or was the 74 164 tank an oddity with some early and some late features?

Major Ledfoot

You're correct, Greg - the title says 74. I should've looked up! ?

The 74 164 tank is a 240 style tank, and the 164s (all D-Jet) used the same tank as the 74 140s with K-Jet. There was an early-type FI-type tank and a carb-type tank. The later 78+ FI tanks went to a two-pump system, and this was the service option for US 74+ cars experiencing vapor lock issues since US market only got K-Jet 140s.

The 74 model tanks do have the brass bung in the bottom of the tank for the tank filter - I think I posted pics of the one in my 74 K-Jet 145 - but I haven't been successful in removing the bung. The 145's current tank has a problem with a suspected rust hole in the internal hose between the tank filter and the fuel pump connection, and the tank filter is probably clogged too.

So rather than repair the 145's tank, one of those 240 tanks I bought from you is going into the 145; it's the same shape as the 145 tank, and later 240 tanks have the benefit of having an internal swirl pot which the in-tank pump sits in, plus these tanks are designed for an in-tank pump, so there's no plumbing inside the tank.

carnut222

Major Ledfoot
You're correct, Greg - the title says 74. I should've looked up! ?
The 74 164 tank is a 240 style tank, and the 164s (all D-Jet) used the same tank as the 74 140s with K-Jet. There was an early-type FI-type tank and a carb-type tank. The later 78+ FI tanks went to a two-pump system, and this was the service option for US 74+ cars experiencing vapor lock issues since US market only got K-Jet 140s.
The 74 model tanks do have the brass bung in the bottom of the tank for the tank filter - I think I posted pics of the one in my 74 K-Jet 145 - but I haven't been successful in removing the bung. The 145's current tank has a problem with a suspected rust hole in the internal hose between the tank filter and the fuel pump connection, and the tank filter is probably clogged too.
So rather than repair the 145's tank, one of those 240 tanks I bought from you is going into the 145; it's the same shape as the 145 tank, and later 240 tanks have the benefit of having an internal swirl pot which the in-tank pump sits in, plus these tanks are designed for an in-tank pump, so there's no plumbing inside the tank.

Interesting... I just assumed the 74- change to the tank meant it was the same as the 240 tank...now I know there's an odd hybrid tank in 74!

AdrianH

Rechecked the details from the ID plate and confirms it is a '74 while the rego sticker says '75! The tank is attached from below and is not part of the boot floor, only access from the boot is through a small plate where the fuel send unit is.

There is a brass bund on the left side of the tank, does not look easy to remove. Thinking of using a section of rod or bolt ground square to fit the plug with a nut or the bolt head able to take a socket to allow twist. Might replace the bung while it is out along with the filter.

carnut222

AdrianH
Rechecked the details from the ID plate and confirms it is a '74 while the rego sticker says '75! The tank is attached from below and is not part of the boot floor, only access from the boot is through a small plate where the fuel send unit is.
There is a brass bund on the left side of the tank, does not look easy to remove. Thinking of using a section of rod or bolt ground square to fit the plug with a nut or the bolt head able to take a socket to allow twist. Might replace the bung while it is out along with the filter.

I ground the end square on a large-diameter short bolt and keep that special tool in my 1800ES just in case. Works fine.

AdrianH

I have found a bolt, just need to cut down the length a bit and ground it to fit the plug. Will try to work on it over the next day or two during the evenings after work.

AdrianH

Still working on the fuel system with focus on the tank. Looking at running a treatment through the tank to clean and treat (KBS kit) which we have been running through my wife's Vespa restoration. Looking into the tank I can see there is a plastic item in the upper tank area. Would there be any issue in using the treatment with this?

AdrianH

It has been some time since I have posted any updates, that last 18 months have been caught up with some family matters. During this time work has continued on the projects but at a reduced rate.

On the 164 the bonnet has been stripped back with some repairs to an area where it looks like the battery failed in the past. Started undercoat painting but weather has got too cold to continue for now.

Been prepping the boot lid, outside stripped back to metal with four small rust spots to fix and a few dents to fix. Once weather improves, painting can commence.

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