Return line spring in fuel filter head. Is it needed and what does it do?

Golden Helmet · Apr 10, 2019

PRAISE Jesus / Allah / Moses / whatever deity you believe in, I got the stubborn ******* on!!! I just got off work and figured I'd just take a real fast crack at it, and whadaya know, it went on this time with almost no effort. I don't know why, but I won't complain

I did hit this olive with the drill, but only just a tiny bit, I started and then quickly decided it was a stupid idea. So hopefully the ******* won't leak.

Next issue is the return line from the filter to the injector. The clear line Calvin installed has gotten extremely hard and won't stretch one bit. I'm gonna have to get some fresh hose.

After that, I should be home free

Golden Helmet · Apr 10, 2019

Just updating because I don't want to leave this thread hanging. Everything's back together now and seems to be working flawlessly. No leaks that I can see, I'll know for sure by the end of this week if the air intrusion is truly gone, but so far the signs are good. I've got the IP soaking in ATF now, just to help keep it clean. This is the first time I've changed the fuel filter since I bought the truck, so it was long overdue.

Thank you guys so much for the help and suggestions. And an extra thanks to Wes for modding that fuel filter head for me, I really appreciate you doing that and I look forward to doing more business with you in the future

Thewespaul · Apr 11, 2019

Thank you sir!

icanfixall · Apr 14, 2019

The fuel filter supply line from the mechanical lift pump is 3/8 olive. The discharge from filter to injection pump is 5/16 line and olives. Conestoga Diesel and Oregon fuel injection sell these check valves. There is two different sizes. Small is the one for the return lines with the green clamps. The red clamps is the large line and fitting. DO NOT MIX N MATCH these different lines or fittings.

True IDI Blue · Jun 19, 2019

Is there a check valve in the fuel water separator head?

chillman88 · Jun 19, 2019

True IDI Blue said:
Is there a check valve in the fuel water separator head?

Not in the supply side as far as I know, just that one return line that goes to the #1 injector. Are you chasing fuel drainback? @Thewespaul sells check valves that go inline before the filter.

True IDI Blue · Jun 19, 2019

Yes and No. My fuel pump went and I ordered an electric fuel pump. I am going to rebuild it and learning a lot from your Q and As. Your threads are helping get my idi back to ford condition. Thanks much

Selahdoor · Jun 19, 2019

I lost the ball from that, just this last sunday. Decided to plug it and be rid of the possible headache.

Garbage_Mechan · Jun 19, 2019

Olives have to appear to be one size too small to actually fit. I learned over the years that pre stretching them helps. You have to act like you are trying to break it. They are very.....resilient. Some things that have worked over the years: push olive up a tapered punch then put in on line. Or use a golf tee as an expansion tool and slip it onto the line. Or push it up a pair of needle nose pliers then spread the pliers to stretch it then slip it on the line.

Return line spring in fuel filter head. Is it needed and what does it do?

Golden Helmet

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Golden Helmet

Full Access Member

Thewespaul

Supporting Member

icanfixall

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True IDI Blue

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chillman88

Supporting Member

True IDI Blue

Registered User

Selahdoor

How can I help you, or make you laugh, today?

Garbage_Mechan

Garbage Mechanic

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