Author Topic: Oil Cooler Gasket Seal  (Read 4051 times)

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Offline Mike0F02G146688

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Oil Cooler Gasket Seal
« on: October 30, 2008, 08:58:51 pm »
I am concerned about the metal gasket seal between the engine block and the oil cooler adapter.  Do I need to apply sealant on both sides of the metal gasket to prevent oil leaks?

Thanks in advance, Mike


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Offline j beath

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Re: Oil Cooler Gasket Seal
« Reply #1 on: October 31, 2008, 02:19:07 am »
Mike: Metal? I'm working with normal fiber gasket material. Even the stock material was fiber to my knowledge...Jack

Offline Rob

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Re: Oil Cooler Gasket Seal
« Reply #2 on: October 31, 2008, 03:20:57 am »
I am concerned about the metal gasket seal between the engine block and the oil cooler adapter.  Do I need to apply sealant on both sides of the metal gasket to prevent oil leaks?

Thanks in advance, Mike


No. Metal to metal will seal.

Offline Rustin

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Re: Oil Cooler Gasket Seal
« Reply #3 on: October 31, 2008, 03:51:16 am »
originals are metal with a coating on them. dont use sealer

Offline TA28

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Re: Oil Cooler Gasket Seal
« Reply #4 on: October 31, 2008, 10:36:22 am »
as long as there no bent edges will work fine 80 psi at 8200 rpm.

Offline Mike0F02G146688

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Re: Oil Cooler Gasket Seal
« Reply #5 on: November 01, 2008, 08:16:04 am »
What torque should be put on the adapter bolt to prevent leaks?

Thanks in advance, Mike


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Offline rmaginnis

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Re: Oil Cooler Gasket Seal
« Reply #6 on: November 02, 2008, 12:15:36 am »
What torque should be put on the adapter bolt to prevent leaks?

Thanks in advance, Mike
Roughly, 25ft-lbs.  It really doesn't take much. If you think about it, the oil filter seals with a hand tight fit using a very pliable rubber gasket. The metal gasket won't leak either with a modest amount of torque on the bolt. In fact I use my wrist - 3/8" ratchet wrench with one hand and have never had a leak.

'70 Boss 302, April 1970, Dearborn
'12 Boss 302, April 2012, CO/R/T

Offline Mike0F02G146688

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Re: Oil Cooler Gasket Seal
« Reply #7 on: November 10, 2008, 06:24:13 am »
I completed the installation of the oil cooler system.  I tightened the hollow adapter bolt to 25 lbs-ft torque, however there was profuse leakage at the metal gasket between the block and adapter.  I tightened the hollow bolt to 70 lbs-ft torque and "almost completely" eliminated the leak.  Do I dare put more torque on the hollow bolt?

Thanks in advance, Mike


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Offline gt40tt

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Re: Oil Cooler Gasket Seal
« Reply #8 on: November 10, 2008, 09:13:42 am »
While in theory the metal gasket will not leak,and in fact some folks report that to be true.I have found that the application of Permatex Aviation gasket sealer insures no leaks.
Apply lightly to both sides of gasket,and to the block and adaptor as well.Let sit for 10 min then assemble.

Offline McKeever

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Re: Oil Cooler Gasket Seal
« Reply #9 on: November 10, 2008, 06:50:00 pm »
Shop Manual, Volume 2, Engine, Page 21-04-38
reads,"Oil filter adaptor to block" 60-100 FT LBS BOSS 302. HTH.
Owned my BOSS since March 1974.
0F02G154740 Dearborn 1-16-70
Honesty is doing the right thing with a witness.
Integrity is doing the right thing without one.
The finish line seems ever distant.

Offline Mike0F02G146688

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Re: Oil Cooler Gasket Seal
« Reply #10 on: November 10, 2008, 07:18:06 pm »
The shop manual torque spec is for the Oil Filter adapter which is pictured in Figure 55 on page 21-04-24.  The hollow bolt to attach the Oil Cooler adapter is a much different part. Can the hollow bolt take 100 lbs-ft torque?

Thanks in advance


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Offline McKeever

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Re: Oil Cooler Gasket Seal
« Reply #11 on: November 10, 2008, 07:39:44 pm »
Look close..
That spec is for a Cartridge type oil filter. Thats not what any BOSS uses, Oil Cooler or not.
The page I refer to Specifically refers to BOSS 302.
My car has an Oil Cooler, I used the Factory coated steel gasket, no sealer. Torqued it to 75 FT LBS, never had a leak.
The fact yours sealed better at 60 FT LBS seems to bear out the Shop Manual ( no insult intented ) I rarely find them wrong.
The difference between clamping a hollow steel cartridge, and clamping a solid multi port casting both require and allow for the higher torque specs. Granted the bolt pictured looks similar, the BOSS bolt is much different.
« Last Edit: November 10, 2008, 07:52:49 pm by McKeever »
Owned my BOSS since March 1974.
0F02G154740 Dearborn 1-16-70
Honesty is doing the right thing with a witness.
Integrity is doing the right thing without one.
The finish line seems ever distant.

Offline rmaginnis

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Re: Oil Cooler Gasket Seal
« Reply #12 on: November 10, 2008, 10:47:32 pm »
I completed the installation of the oil cooler system.  I tightened the hollow adapter bolt to 25 lbs-ft torque, however there was profuse leakage at the metal gasket between the block and adapter.  I tightened the hollow bolt to 70 lbs-ft torque and "almost completely" eliminated the leak.  Do I dare put more torque on the hollow bolt?

Thanks in advance, Mike

Mike, my apologies - I goofed. I just put a torque wrench on mine and it clicked up to about 55 ft-lbs then slightly turned. So, 25ft# won't cut it. Again sorry for the mess on the floor :-[ 

That hollow bolt will take 100ft# It is 5/8" to 3/4" bolt (18TPI) On page 21-04-39 is listed torque specs for fasteners up to 5/8-18 which is spec'd at 130-145ft#. 

If your still experiencing leaks at 60-70 ft# check the mating surfaces on the block and filter adaptor for damage.

Lastly, the torque spec for "Oil filter Adapter to Block" listed on page 21-04-38 is referencing the block insert/adapter fitting shown on page 21-04-24.

Rick

'70 Boss 302, April 1970, Dearborn
'12 Boss 302, April 2012, CO/R/T

Offline McKeever

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Re: Oil Cooler Gasket Seal
« Reply #13 on: November 11, 2008, 05:47:49 pm »
I too apologize..
Thank you Rick, I stand corrected also!
Owned my BOSS since March 1974.
0F02G154740 Dearborn 1-16-70
Honesty is doing the right thing with a witness.
Integrity is doing the right thing without one.
The finish line seems ever distant.