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Re: oil cooler adapter gasket [message #260675 is a reply to message #260591] Mon, 01 September 2014 23:38 Go to previous messageGo to previous message
John Heslinga   Canada
Messages: 632
Registered: February 2011
Location: Edmonton, Alberta, Canada
Karma:
Senior Member
A few comments and answers:

1.
Quote:
John H, is what your pictures refer to as the "Adaptor Bolt" the same item that is labeled as the "EXTENSION" on the drawing in that series of pictures?


Answer: Yes -- What I refer to as the Adapter Bolt is also refered to as the extension. (It is the short fastener you see next to the "To Cooler" Pipe at the top of the the picture I identified ( http://www.gmcmhphotos.com/photos/discussion-photos/p55769-silicone-o-ring-for-oil-cooler-adaptor.html)
( http://www.gmcmhphotos.com/photos/discussion-photos/p55778-oil-cooler-adaptor-mounting-anbd-extension-bolt.html ) That Extension Extends the oil input to the engine through the Oil cooler adapter. (from the filter) It also mounts(or Fastens) The oil cooler adapter to the the oil filter block adaptor. That extension does not bottom out at any point and all the pressure of the torque on that bolt is against the outside flange of the oil filter block adaptor. see this picture
http://www.gmcmhphotos.com/photos/discussion-photos/p55775-oil-cooler-adaptor-ext.html

2.
Quote:
I guess the Dorman seal is slightly thinner, thereby precluding the cracking noted by John Heslinga???


Answer: Yes -- When using an old oil filter gasget the gasget is far too thick for the torque applied. That torque will either extrude the gasget completly and leak or break the flange of the filter block adaptor. With the silicone ring from Dorman it is far thinner but thick enough to make an effective seal. (Properly fitted O-Rings are never crushed but slightly compressed to create an effective seal.) the cross section of the Dorman seal is not round. It is square and actually designed and made for the same purpose. Its fit in the square seal slot of the coller adaptor makes its use ideal.

3.
Quote:
I bought some today, 3 in a package. are these o rings to be changed every
oil change?


Answer : No -- Once you have the Extension torqued to the Oil cooler adaptor you do not have to undo it unless you are repairing it or have removed it. Changing the oil filter will not effect that interface and if it is not leaking, leave it be.


Best Regards

John and Cathie Heslinga 1974 Canyonlands 260 455, Manny tranny and 1 ton, 3:70 LS, Red Seal Journeyman, DTE, BEd. MEd. Edmonton, Alberta

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