[Vwdiesel] Cracked Heads 1.5L NA and 1.6L NA . and more.

[Drew MacPherson]

My .02$ guess is that it has to do with the composition of the alloy.  I
have a number of early 1.6TD heads that do not have cracks between the
valves ('83 and '84 solid lifter heads.)  However I have two 1.6 NA solid
lifter heads (one '84, one '86) with cracks, and all of the ME/MF hydro
heads I have have small cracks between the valves.

Along the way VW stopped making separate castings for TD heads - I figure
they were trying to cut production costs and figured that small cracks
were no big deal.

Drew

On Tue, 4 Feb 2003 LBaird119 at aol.com wrote:

> > Cooling and too much pedal to the metal .and Aluminium joining Cast Iron.
>
>   I don't really see how the dissimilar metals is the problem with the VW
> heads cracking.  It's between the valves only and it's so consistent that it
> seems to be a stress relief.  With where it is it doesn't seem likely to be
> caused by the head bolts, which is where the stress would show up if it
> were from the two metals.
>   My former machinist (got a better job) first informed me that my Rabbit's
> head was cracked.  He then went on to say that all it really meant is that
> it wouldn't do it again/anymore!
>      Loren
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