Fixed oil leak on oil cooler line block

[rdezs]

Ditched the OEM oil cooler lines and block on a 6.0 last year. The design is problematic. Went with steel braided.

 

[j91z28d1]

for anyone curious, since I didn't see it mentioned. that's a bypass valve the o ring is on.

you can buy the valves by themselves too. I wanna say it's 4 to 7psi? when cold the oil cooler is decent restriction. especially at higher rpm flow rates. probably when warm too at high flow rates. good to have a bypass in there.

 

[solli5pack]

for anyone curious, since I didn't see it mentioned. that's a bypass valve the o ring is on.

you can buy the valves by themselves too. I wanna say it's 4 to 7psi? when cold the oil cooler is decent restriction. especially at higher rpm flow rates. probably when warm too at high flow rates. good to have a bypass in there.

So do non oil cooler trucks with the blockoff plate have that plug/valve also? I've changed the pan gasket twice and re sealed the block off plate more times than I can count and still have a leak around the oil filter. At this point I assumed I have a rear main leak even though it looks clean in the inspection hole.

 

[j91z28d1]

So do non oil cooler trucks with the blockoff plate have that plug/valve also? I've changed the pan gasket twice and re sealed the block off plate more times than I can count and still have a leak around the oil filter. At this point I assumed I have a rear main leak even though it looks clean in the inspection hole.

nah, only the oil cooler lines have the bypass.


have you tried one of the billet block offs with an o ring seal? mine wasn't that, but cheap to make sure. mine I'm sure is the pan gasket.


for yours, did you rtv the corner of the gasket? it seems common for the plate the rear main in it can leak and not the rear main itself. same amount of work to get to it thou.

 

[solli5pack]

Yes with the RTV...and waited 24hrs before starting the truck...and also have the billet block off and use some RTV on that also....I think I'm going to order a factory plate and try and Reseal it one more time...it really looks like it's coming from the plate but there's oil everywhere so it's hard to tell.

 

[donjetman]

From 2020 to 2023 I had a ICT brand billet plate when I installed my own oil cooler . No leak.

In 2023 when I removed my self installed oil cooler, I reinstalled the stock oil cooler block-off plate & bolts with a Felpro # 72435 gasket.

I always put a thin coat of RectorSeal T+2 on gaskets. No leak.

 

[rdezs]

The trick on the OEM 10 mm bolts for that block off plate is to torque them correctly. Too loose and they leak. Too tight and it works the plate and it leaks. You need an inch pound torque wrench... Can't remember exactly what the book called for, I'm thinking it was around 108 inch pounds. You can easily exceed that with a short quarter drive ratchet and two fingers .

And a side note... Once the oem blockoff plate has been torqued too far, it's warped and won't seal right. A thicker aftermarket one will yield more success and is more forgiving ..... But if you go much tighter, you risk pulling the threads.