[OT] Diesel HG help needed

[drew at scirocco.cs.uoguelph.ca (Drew Mac)]

Allyn wrote:

>Why would the head be scrap?  This engine had less than 10k on a rebuild
>(though it did sit unused for some extended periods).
>Al
>
>  
>

Unfortunately VW diesel heads are very intolerant of overheating, and 
will warp at the drop of a hat.  Although a machine shop will tell you 
they can be resurfaced, listen to the Bentley and source a good used 
head if yours is warped.  The kind of stress that your engine was under, 
as well as the symptoms it's exhibiting now, may mean that the head has 
cracked as well.  In order to fully inspect the head you need to knock 
out the precombustion chamber inserts and inspect closely - the only 
acceptable cracks are small (~1mm) ones between the valve seats.

A rebuild means nothing unless it was performed by a shop with 
experience working on VW diesels.  The head torquing procedure is 
specific to the diesel, and two retorques must be performed, one after 
the engine has been heat cycled once, and once again after about 1000 
miles of normal driving.

Drew

-- 
84 Wolfsburg Ed. Scirocco GTD     http://scirocco.cs.uoguelph.ca/gtd
77 Scirocco project - the next GTD?
99 A3 Jetta GL TDI (hers) 02 Jetta GLS TDI (Bloatware)
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