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Forum: Diesel Discussion

07-07-2009, 11:44 AM

Replies: 13

Fuel pressure/resistance through primer pump assembly normal? 85 300TD (123)

Views: 2,542

Posted By jt20

for whatever its worth: I cleaned the...

for whatever its worth:

I cleaned the areas around the threaded inserts.

Loosened each one 1/2 a turn, then tightened each one as best as I could.

I now have the smallest bubble I have...

Forum: Diesel Discussion

06-30-2009, 11:39 PM

Replies: 13

Fuel pressure/resistance through primer pump assembly normal? 85 300TD (123)

Views: 2,542

Posted By jt20

Michael, I am replying to your thread to...

Michael,
I am replying to your thread to keep the info together and keep the information public.
I believe you want to contact a Bosch certified injection shop, or any shop that has a...

Forum: Diesel Discussion

06-21-2009, 02:44 AM

Replies: 13

Fuel pressure/resistance through primer pump assembly normal? 85 300TD (123)

Views: 2,542

Posted By jt20

wonderful. You are no longer 'stock' by...

wonderful.

You are no longer 'stock' by any means. If it was me... I would make some diagrams showing me where my fuel system was pressurized vs. vacuum. Air will only enter on the vacuum...

Forum: Diesel Discussion

06-21-2009, 01:46 AM

Replies: 13

Fuel pressure/resistance through primer pump assembly normal? 85 300TD (123)

Views: 2,542

Posted By jt20

this might help illustrate the interior workings...

this might help illustrate the interior workings of the lift pump and its marriage to the IP.

See the roller bearing? That moves in and out of the housing and pushing on that metal piston. The...

Forum: Diesel Discussion

06-21-2009, 01:37 AM

Replies: 13

Fuel pressure/resistance through primer pump assembly normal? 85 300TD (123)

Views: 2,542

Posted By jt20

the pump you are looking at is both the hand...

the pump you are looking at is both the hand primer and the fuel supply to the IP. When the car is running, a camshaft in the IP is turning and pumping the lift pump.

The big spring is the return...

Forum: Diesel Discussion

06-21-2009, 12:57 AM

Replies: 13

Fuel pressure/resistance through primer pump assembly normal? 85 300TD (123)

Views: 2,542

Posted By jt20

I meant that it was unlikely there was a stuck...

I meant that it was unlikely there was a stuck valve. You can see the 2 black, plastic plungers here. They are the closest thing to a 'valve' in this assembly.

If air is getting into your lift...

Forum: Diesel Discussion

06-20-2009, 11:49 PM

Replies: 13

Fuel pressure/resistance through primer pump assembly normal? 85 300TD (123)

Views: 2,542

Posted By jt20

I cannot answer the question regarding pressure...

I cannot answer the question regarding pressure differences. The info is there if you search and infer. Search "pressure relief valve"

also, I am not aware of a fuel line that goes to the IP...

Forum: Diesel Discussion

06-20-2009, 06:57 PM

Replies: 13

Fuel pressure/resistance through primer pump assembly normal? 85 300TD (123)

Views: 2,542

Posted By jt20

I'm in the same boat elaborate on your...

I'm in the same boat

elaborate on your setup and which lines you attached to.

perhaps, but unlikely. Fastlane sells a full rebuild kit for this pump.

the entire pump comes off with three...

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