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Quick PSA on 3800 oil filter adapter pressure relief valve and installation. by deezil
Started on: 09-08-2015 11:10 PM
Replies: 2 (1588 views)
Last post by: Dennis LaGrua on 09-09-2015 10:40 AM
deezil
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Report this Post09-08-2015 11:10 PM Click Here to See the Profile for deezilSend a Private Message to deezilEdit/Delete MessageReply w/QuoteDirect Link to This Post
I have been under the weather here lately and been putting off some service on my 3800sc powered 88gt.

I finally came out of the haze and tackled a leaking oil filter adapter gasket on my car the other day. It went pretty smooth other than contorting my (stiff from being sick) self into a pretzel to get to it.


This reminded me of a issue I came across on my sisters car a while back.

My Sister bought my 2000 Buick regal gs off me when I purchased a new truck. It has as you all know a 3800sc engine. She had some service done a while back and one of the things the shop **corrected** was a leaking oil filter adapter gasket. She noticed some drips in the driveway so I Crawled under the car to look at it. Sure enough it was leaking a bit from the adapter.

I purchased a new gasket and tore the adapter off the car. Much to my surprise the flat side of the Cup/piston face of the oil pressure relief valve was stuck FAST to the adapter by a blob of RTV. It was enough I had to pry it off with my thumb. The shop used a gasket but slathered it on both sides with some sort of high powered red rtv. Some of the rtv must have got onto the cup face of the Oil pressure relief piston and stuck it under heavy compression of the relief valve spring to the adapter face. YIKES!

Let that be a Lesson to ya all. Don't use rtv. The gasket isn't designed for it. If you need to stick it for some reason to the timing cover face while you finagle yourself into a position to replace it just use a *very small amount* of High tack gasket sealant at the corners to hold it.

That or just take your time Put the spring in first into the timing cover and then slide the cup/piston into the bore and don't use anything at all other than the gasket itself.
:in edit: yes the car is still running to this day. Thankfully at the time she had the work done she had been off her feet with a busted ankle and the car didn't get driven much.

My PSA for the day.

[This message has been edited by deezil (edited 09-08-2015).]

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Khw
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Report this Post09-09-2015 12:20 AM Click Here to See the Profile for KhwSend a Private Message to KhwEdit/Delete MessageReply w/QuoteDirect Link to This Post
I just use this for most of my gaskets.



Thin coat on both faces, give it a couple of seconds to get tacky and stick it in place.
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Dennis LaGrua
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Report this Post09-09-2015 10:40 AM Click Here to See the Profile for Dennis LaGruaSend a Private Message to Dennis LaGruaEdit/Delete MessageReply w/QuoteDirect Link to This Post
The oil filer adapter housing seems to be an area where leakage is very common on 3800 engines. I have a tiny leak there as well. Due to the possibility of RTV adhesive or gasket sealant getting into the check valve passage, its probably a good idea to replace the adapter housing gasket dry. All it takes is a small amount to cause the check valve sticking. I often wonder why Felpro or GM has not redesigned the gasket with a built in seal ring. That is a high pressure area that often leaks.

------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

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