How to Replace oil filter adapter gasket & o-ring

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JCribb

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I need to do this, I just recently picked up an AC Delco gasket and O-ring, because 2 Dorman gaskets have done nothing but leak, and it is quite irritating to have a leak on a fairly new engine (13k miles). I guess I will have to tackle this and change my alternator at Christmas.
 

mountie

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I'm glad I read this... My oil filter/cooler adapter has leaked since 1989! Under warranty I had the dealer replace the adapter, and the old one was not machined at the adapter surface ( someone here mentioned this was by design, that the "pebble surface smooths at contact and seals??) ..To me, a cast surface requires a machined surface/gasket to seal??

The dealer replaced adapter was machined. It still leaked. I have been wrapping a rag around the oil filter to absorb the darn drip.
I will research the parts to do as suggested in this thread.
 

shamrock246

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I got tired of mine leaking no matter what i did and pulled the whole thing off. I got the standard small block oil filter adapter from Summit and a 7099 filter from NAPA,no leaks,great oil pressure with 0w-40 mobil 1 and my burb is towing 90% of the time.
 

magimerlin

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This is the regular oil filter adapter for those interested. Just unbolt the oil cooler adapter and remove. Then bolt this in its place, will need (2) 5/16x18x1-1/8" bolts and use the above mentioned filter. Before I lifted my truck I removed my leaking set up and put the regular filter adapter in its place and used an m454 filter. I did how ever crank to level, had bad/worn motor mounts and had 1/2" to 3/4" clearance from my driveshaft.
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JCribb

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For anyone interested in replacing their OEM oil filter adapter, I have the GM part numbers for you.

12562832 is the part number for the OEM version that DOES NOT have the oil cooler line provisions, and it retails for roughly $110

12562833 is the one that DOES this one retails for roughly $125

I have replaced my gasket and shim (with AC Delco parts) and my adapter still leaks, so I will be in the market for a new oil filter adapter.

The year range for these parts is 88-99, and I literally spent 30 minutes or more trying to find this information.
 

MIHELA

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I have sold many of those adapters without the cooler provision. In theory you can use the basic adapter with a short filter and clear but it is a pain to change.
 

Chevy blood

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I had to do this on my 89 3/4 ton. What I found is after three attempts with the auto parts store kits, they are the wrong size. Went to the dealership and got the gm kit and hasn't been a problem since. Its been 4 years now and hasn't leaked a drop
 

thinger2

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FYI - if you are doing an oil cooler delete, watch out for the bolt heads interfering with the filter.
I am using the Melling MFA350 adapter with the AC Delco PF454 filter and the hex head on a 5/16-18 x1 1/4 hits the inside radius of the filter.
A button head allan bolt clears it with about .030 of space.
Also, if you are having trouble getting your oil coated filter off, try this before you pound a screwdriver through it.
Cut a piece of sandpaper about 2 inches wide and long enough to wrap around the filter.
Use an 80 grit if you have it, the gritier, the better
Fold it in half lengthwise so the sand is facing out on both sides.
Wrap it around the filter as close to the base as you can and put your filter wrench over the sandpaper.
The sand digs into the filter can and also digs into the steel strap of the filter wrench.
Also works with a rubber strap wrench.
Ive never had it fail to pull a filter off yet

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HotWheelsBurban

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Something else I learned about stuck oil filters on GM engines; if you get the adapter too clean, it'll get cooked on. Then you get to try the aforementioned tricks to get it off! I started leaving a thin film of the old oil on the adapter, where the gasket seats. I put fresh oil on the new filter gasket too. No more stuck on filters after I started this, even when the oil change period goes a little long.
 
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