Interesting find on lifters.
Thread Starter
AudiWorld Super User
Joined: May 2003
Posts: 13,843
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Interesting find on lifters.
<img src="http://pictureposter.audiworld.com/56100/lifter_1.jpg">
<img src="http://pictureposter.audiworld.com/56100/lifter_2.jpg">
Ok, I stumbled across this one today while at work, and it's interesting.... koop, Miktip, Alex, Toxcheap, maybe others might be interested.
The pictures you see are of two lifters, of course. The left is from a 9A VW, which I assume is the same lifter used in 3A's and NGs. If someone can clarify that, that'd be great, but it would seem typical of Audi to use the same in all. The right lifter is from 90-94 Pontiac Grand Am's with a Quad4. Yes, GM. Another thing copied. Anyways, these lifters are readily available at any parts store for cheap, so I did some looking into seeing just how close they are to each other. Here's what I came up with using an accurate caliper...
VW Lifter
BORE SIZE 1.378 (inches)
HEIGHT 1.023
LASH (from surface to valve cap) .747
BORE AND LASH, of course are the important factors here, height merely includes the skirt at the bottom too.
GM LIFTER
BORE SIZE 1.378 (wow,exact!)
HEIGHT 1.065
LASH .796
So, our bore size is a spot-on-match, but the valve lash height is greater by .050 on the GM lifter. Both lifters are pumped down. I thought that they might work, in fact, the extra lift would be good, except that I am worried it will be too much and won't allow the valves to fully close. I don't think any hydraulic lifter could compensate for that - but what do you guys think?
<img src="http://pictureposter.audiworld.com/56100/lifter_2.jpg">
Ok, I stumbled across this one today while at work, and it's interesting.... koop, Miktip, Alex, Toxcheap, maybe others might be interested.
The pictures you see are of two lifters, of course. The left is from a 9A VW, which I assume is the same lifter used in 3A's and NGs. If someone can clarify that, that'd be great, but it would seem typical of Audi to use the same in all. The right lifter is from 90-94 Pontiac Grand Am's with a Quad4. Yes, GM. Another thing copied. Anyways, these lifters are readily available at any parts store for cheap, so I did some looking into seeing just how close they are to each other. Here's what I came up with using an accurate caliper...
VW Lifter
BORE SIZE 1.378 (inches)
HEIGHT 1.023
LASH (from surface to valve cap) .747
BORE AND LASH, of course are the important factors here, height merely includes the skirt at the bottom too.
GM LIFTER
BORE SIZE 1.378 (wow,exact!)
HEIGHT 1.065
LASH .796
So, our bore size is a spot-on-match, but the valve lash height is greater by .050 on the GM lifter. Both lifters are pumped down. I thought that they might work, in fact, the extra lift would be good, except that I am worried it will be too much and won't allow the valves to fully close. I don't think any hydraulic lifter could compensate for that - but what do you guys think?
AudiWorld Super User
Joined: Nov 2001
Posts: 18,499
Likes: 87
Re: Interesting find on lifters.
Dunno? You'd have to fill them with oil to see what that difference is. Also, one thing I did WRT lifters, is check the 309AD against the later units found in the AFC 12v. Looks to be a direct replacement, and is lighter than the 309AD (used in the MC, NF/NG, 7A, 3B, etc).
AudiWorld Expert
Joined: Jun 2000
Posts: 29,356
Likes: 1
Be careful! ;O)
Audi engines typically run higher oil pressures than Merican engines! ;O)
Very common sized lifter, for many makes.
But ya gots to wonder about the metalergy, smacking your expensive Schrick cam lobes at 7000 rpms?
I tend to stay with German made, for German cams, as they know their metalergy. ;O)
Very common sized lifter, for many makes.
But ya gots to wonder about the metalergy, smacking your expensive Schrick cam lobes at 7000 rpms?
I tend to stay with German made, for German cams, as they know their metalergy. ;O)
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