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Old 11-01-2005, 03:01 PM
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chevy 350 oil filter housing help

Not quite a hot rodding question, but this is the best place to turn to in my experience. I have oil leaking from where the oil filter housing meets the engine block on my 88 chevy 1500. The housing is an aluminum piece where the oil cooler send/return lines are bolted and the oil filter attaches. There is nothing in my manual about this piece, and I have never gotten reliable advice from local Mr. Goodwrench-in fact the could not even figure out the correct piston rings to sell me for my STOCK 350, a local machine shop finally looked up my engine code and ordered me "shallow groove piston rings" and i finally got my engine back together. Anyways any advice on this seemingly rare problem would be greatly appreciated.

Thanks
Brian

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Old 11-01-2005, 03:23 PM
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There are two gaskets between the adapter and the block. One flat gasket and a square o-ring gasket. Be sure both are in place. They do like to leak and they don't like being re-used. also the quick connect fittings to the oil
cooler like to leak. Most commonly the mating gaskets though. If you don't
like your GM dealer, NAPA carriers them also and the gaskets usually come together.
p.s. not a rare problem. we see it a lot.
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Old 11-01-2005, 03:34 PM
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I agree with the before post, it is on the common side, it cost a friend of mine his L98 in a Firebird GTA some years ago when it leaked so severe it ran all the oil out within 4 miles. Everytime I`ve ran into this problem, I removed the cooler and got a stock piece from another block, a oil cooler really isn`t needed unless your towing heavy loads or doing high rpms for long lenths of time.
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Old 11-01-2005, 04:27 PM
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from brian

Thanks for the info. It is a slow leak, just enough to stain my driveway.
I am pretty handy when it comes to mechanics,but I did not want to pull the part off untill I was sure it was a simple gasket fix. Is there any special proceedure , or can I simply unbolt the cooler lines and oil filter and figure it out from there.

Didn't mean to be so ruff on the GM guys-I'm just dissatisfied with the one local parts dept.
Thanks again,

Brian
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Old 11-01-2005, 06:58 PM
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Easy. oil filter, two bolts, two gaskets. Unbolt the cooler line bracket and let
the lines hang down with the adapter while you change the gaskets. if you try to disconnect the cooler lines at the quick connect fittings you'll either create another leak or have to replace them too.
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Old 11-02-2005, 06:18 AM
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I agree, do not disconnect the lines, just unbolt it and drop it down. You may or may not have an O ring on yours also.

Vince
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Old 11-02-2005, 01:13 PM
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Gm part number 88893990. This comes with the gasket and the o ring.
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Old 11-02-2005, 01:16 PM
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leak

like the others stated,,,common problem,,, easy fix..

Keith
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Old 11-02-2005, 04:31 PM
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Thanks Everyone

Will get to it this weekend.

Thanks again
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Old 10-24-2010, 12:11 AM
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86 chevy surburban 350

Do i have to pull the ditributor to change the gasket on the oil cooler housing? And does anyone know or have diaphram of vacumn lines?
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Old 10-24-2010, 12:39 AM
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I bought a 1991 Chevy 4x4 and my father in law who has worked as a parts man at a chevy dealer for 30 years told me to take housing and the oil cooler lines off and install a regular spin on filter. He says lines like to leak and so does the houseing on block and the lines are expensive to replace. I had a fitting to mount a spin filter the only thing you have to do is to run a 1218 AC oil filter to clear drive shaft. 1218 is a shorter oil filter
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