[T3] Lifters that wont rotate

[Jim Adney]

On 28 Aug 2012 at 21:18, Keith Park wrote:

> The Lifters are SUPPOSED to rotate because they are offset from the cam
> lobe, and they are on the T4, but 3 of my 4 exaust ones don't and im pretty
> worried about them.  One has a slight dip worn into the middle... Jake
> Raby's suggestion however was to keep them as a mismatch with new ones would
> more likely result in failure.

What does the cam look like? If the wear is even, I'd be tempted to 
replace the lifters. If the lifters don't rotate, I'd expect them to 
wear out VERY quickly.

If the cam looks bad (compare the two edges of the lobe that has one 
rotating and one non-rotating lifter) it's time to replace both 
lifters and cam.

If the lifter bores are offset, then the left side must be offset 
forward and the right side to the rear. In that case, each side wears 
against a different edge of the cam lobe. That's nice, because it 
spreads out the cam lobe wear, and also means that an odd wear 
pattern on one side is less likely to cause problems on the other  
side.

-- 
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Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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