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Tech Area => General Buick Tech => Topic started by: Forzfed on June 06 2017, 04:23:51 PM

Title: Hey Earl? (4.1 Headgasket)
Post by: Forzfed on June 06 2017, 04:23:51 PM
What is the best gasket to use?  Are people still sticking with the Felpro?
Title: Re: Hey Earl? (4.1 Headgasket)
Post by: gusszgs on June 06 2017, 06:27:17 PM
Hope Earl will chime in here. I've read that the original Victor Reinz gaskets are very good. Yet others had had good luck with the Felpro's. I guess it comes down to how well the job and prep is done.
Title: Re: Hey Earl? (4.1 Headgasket)
Post by: Just a Six? on June 06 2017, 07:33:00 PM
I need glasses! :013:
Title: Re: Hey Earl? (4.1 Headgasket)
Post by: earlbrown on June 07 2017, 03:44:01 PM
It depends.   When I built my 4.1 I used Federal Mogul pistons..

I ended up having to deck .035 off the deck and have Cometic make me some very expensive .027" gaskets just to barely get 9:1.  ...along with all the hoops to make the MLS gaskets seal of course.  Then I had to shave my intake manifold..     twice (it swelled back up overnight before I installed it).


That's one of the reasons I made my pistons the way I did.   I would have just got off the shelf FelPro 1000s, left the .035" of meat on my deck and had a gasket that's easy to seal (and buy).

The bad part is when I tossed the FM hypers and put my slugs in, I was committed to the Cometics since I shaved the intake.



I don't think I answered your question though.  :D
Title: Re: Hey Earl? (4.1 Headgasket)
Post by: Forzfed on June 07 2017, 03:53:31 PM
Should I stick with the Felpro 1000 or go with the Felpro 1026?
Title: Re: Hey Earl? (4.1 Headgasket)
Post by: Scoobum on June 07 2017, 04:59:56 PM
Felpros here cuz I can get 'em overnite. Never had an issue with them. I think a lot has to do with prep work and torquing...and I'm beyond anal installing a set. My engines don't see any KR either.
Title: Re: Hey Earl? (4.1 Headgasket)
Post by: Forzfed on June 07 2017, 06:35:55 PM
Your kind of limited with the 4.1.  I did loose my vac and my boost spiked to 30psi if not more.  When the motor was ripped apart the one head gasket showed a little bit of it being blown but yet my vac was still decent.  Maybe down 2 " that's it.
Title: Re: Hey Earl? (4.1 Headgasket)
Post by: earlbrown on June 08 2017, 03:41:56 PM
http://www.felpro-only.com/break_room_forum/showthread.php?tid=487 (http://www.felpro-only.com/break_room_forum/showthread.php?tid=487)
Title: Re: Hey Earl? (4.1 Headgasket)
Post by: Forzfed on June 08 2017, 04:18:06 PM
Excellent link, Earl. :cheers:
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