IHADAV8.com - Turbo Buick Tech, and Nonsense

Tech Area => General Buick Tech => Topic started by: Forzfed on June 01 2017, 04:39:55 PM

Title: 4.1 Cam bearings?
Post by: Forzfed on June 01 2017, 04:39:55 PM

I was looking at my 4.1 and I see that the back cam bearing isn't grooved, still have to check the front one.  My roller cam isn't grooved, so I believe my cam bearings need to be or at least the front one.  Anyone know what bearings to use?

Title: Re: 4.1 Cam bearings?
Post by: earlbrown on June 02 2017, 06:33:26 AM

Fire up a Dremel and groove the front journal in the block.    Then you can use plain ole 14 bolt bearings with a nongrooved roller cam.

Title: Re: 4.1 Cam bearings?
Post by: Forzfed on June 02 2017, 09:02:18 AM

That is only needed for the front one, right?  The back doesn't need to be grooved?

Title: Re: 4.1 Cam bearings?
Post by: earlbrown on June 03 2017, 03:52:35 AM

Just the front. That's what feeds the DS lifter galley

Title: Re: 4.1 Cam bearings?
Post by: Forzfed on June 03 2017, 04:49:14 PM

Thanks, Earl!  That is what I thought.  If it didn't have the groove in the front would oil still get to the DS during idle and lessen on higher rpm?  Or no oil at all?

Title: Re: 4.1 Cam bearings?
Post by: earlbrown on June 04 2017, 04:36:29 AM

none at all unless you have a grooved flat tappet cam journal.


Best thing to do is to groove it and be done.  The end.