[V8] Retorqueing heads

[QSHIPQ at aol.com]

I don't think we disagree...  yet...  I'm still of the thinking  that oil 
leakage from the gasket is not normal.  That said, at 200k, it's  quite possible 
that you need more clamping force, for whatever reason....   If that's the 
case, the twisted head bolt is not the proper fix, that's not  inherent to the 
design of it.  It's a one time use stretch bolt.   The ARP head bolts can be 
reused infinitely (according to them anyhow) and  provide a much higher tensile 
strength, what it appears you are looking for in  your proposed workaround.
 
My own suspicion is if you have an oil leak with a stock head bolt, the ARP  
won't solve the problem.  If it does, you've accomplished the task.   The good 
news is that even if it is something else, you don't have to buy  another set 
of bolts.
 
HTH
 
SJ
 
 
In a message dated 5/16/2008 5:40:54 P.M. Central Daylight Time,  
dag.boesterud at consulgranada.net writes:

First of  all; the head gasket isn't blown. They're new. They were changed 
because  of oil leakage from the right cylinder head. Cylinder heads were 
delivered  to an engine shop and refurbished (milled to spec, new valve stem 
seals  +++). The engine was leak free for about 200-300 km. The leak is now 
back,  but it seems to be a bit smaller. I would not consider
a head gasket with a  bit of oil leakage blown.

The head bolts were of course replaced  (original manufacturer) along with 
head gaskets (original  manufacturer),
and about all other seals you can possibly think  of.

My car may be a "high mileage" car (325 000 km / 202 000 miles),  but I know 
for a fact that the
engine block was exchanged for a new in  Germany in the late 90's, so I would 
suspect the block
to have done  about 100 000 miles. I wouldn't say that is a high mileage 
motor.
300  000 miles is a high mileage motor - but I guess we have a different  
definition of that here in Norway, Europe :)

/Dag
92 V8  4.2
202 000 miles


 



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