Oldsmobile oil system mods - Page 2

Alan Roehrich · 07-28-2010, 11:01 AM

What brand and part number lifters are they?

SSDiv6 · 07-28-2010, 12:12 PM

Quote:

Originally Posted by Glenn Briglio

I checked out three different sets of lifters. Checked the diameter of the orifice going into lifter and location of orifice. Also checked diameter of pushrod cup and they all were within .002.

Make sure they are Oldsmobile lifters and not Chevy. The Oldsmobile/Pontiac lifters has the band and orifice at a different location.

Bill Edgeworth · 07-28-2010, 01:58 PM

Quote:

Originally Posted by SSDiv6

Make sure they are Oldsmobile lifters and not Chevy. The Oldsmobile/Pontiac lifters has the band and orifice at a different location.

Comp cams #863 lifters are a decent off the shelf lifter for these motors.
NEVER use a Chevy lifter in a BOP application as SSDiv6 mentioned the BOP lifter is taller and has the band further up the lifter. If you use a cam with a small base circle the band can be exposed at the bottom of the lifter bore with a Chevy lifter. Not only will you then have an oil problem but you loose support of the lifter in the bore and that could (will) lead to catastrophic failure. While were on the subject of valve train, guide plates are now legal for the Oldsmobile heads you don’t want to run without them!

Run to Rund · 07-31-2010, 02:34 PM

As noted above, you don't need cam bearing oiling restrictors. However, don't drill new holes 180 deg. away or the original hole will be right under the bolt that holds the baffle plate. Drill the new hole around 160 degrees away and you will be fine. The Chevy lifters I have seen meter too much oil to the pushrods. With solids you can drill the lifter oil feeds to .135" and red loctite in allen set screws that you have heated red hot to detemper them and then drilled with a .040" bit.

07-28-2010, 11:01 AM	#11
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,066 Likes: 1,487 Liked 1,630 Times in 378 Posts	Re: Oldsmobile oil system mods What brand and part number lifters are they? __________________ Alan Roehrich 212A G/S

07-31-2010, 02:34 PM	#14
Run to Rund Senior Member Join Date: Sep 2007 Location: Henderson, NV Posts: 583 Likes: 8 Liked 54 Times in 27 Posts	Re: Oldsmobile oil system mods As noted above, you don't need cam bearing oiling restrictors. However, don't drill new holes 180 deg. away or the original hole will be right under the bolt that holds the baffle plate. Drill the new hole around 160 degrees away and you will be fine. The Chevy lifters I have seen meter too much oil to the pushrods. With solids you can drill the lifter oil feeds to .135" and red loctite in allen set screws that you have heated red hot to detemper them and then drilled with a .040" bit.