[Vwdiesel] TDI head question

[Val Christian]

I'm not sure I follow you...but one technique I've seen when an 
opening is slightly underdimension, is to knurl it, with the
deformed metal changing the dimension.  

In your case you want the lifter to slide.  A contrary example is
knurling a shaft, so that a bearing fits snugly and does not spin.
(A technique used to fix rear axel shafts after a spun bearing 
which redimensioned the shaft.)

The ugliness from the breaking of the lifter, may effectively act as
a knurl causing a firm fit.

Did I understand your situation right?

Val


> 
> Well, the mechanic is still trying to help me out regardless whatever 
> the shop owner thinks and is still doing the work trying to get my TDI 
> to where I can re-assemble it.  One question I do have regards the 
> head.  The lifter that got destroyed had quite a time on its way out and 
> gouged up the bore in the actual head casting pretty good.  The mechanic 
> extracted all the broken bits and honed the bore back round.  A 
> replacement lifter fits in nicely with no play and moves very well, but 
> there's still some pretty glaring damage in the bore.  How precise is 
> that sort of thing?  Something in my gut tells me that that should be 
> sleeved or something.  (I don't know what all a head shop can do.)
> 
> Mechanic is very confident on this repair, but despite his honest 
> efforts to help me out, I'm still a little concerned about the 
> destination of the road paved with those good intentions. 
> 
> -Shalyn
> 
> 
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