[AT] Torque for bolts vrs studs in cylinder heads?--followup

[John Wilkens]

Many thanks guys for educating me about head bolts!   To be sure, 
I'll stick with studs!    John W.



At 08:08 PM 04/27/2007, you wrote:
>
>John, There are a whole bunch of GOOD reasons to stay with all of the OEM
>parts and torque specs on head bolts! You may get away with some 
>non-OEM parts
>sometimes but it is like gambling with your engine's life span. Granted it
>varies from engine to engine, usually older engines have more room 
>to play with
>and more modern engines have tighter specs with almost no room for error.
>Some  head bolts are TTY and can only be used once. The headgasket 
>thickness also
>  matters on some engines especially if you have had the head resurfaced.
>Sometimes the OEM manual will give 2 torque specs with the head bolt 
>dry or oil
>on threads. Studs or bolts of the same grade should be the same spec I think.
>If  you lower the grade of bolt you may be asking for problems. Just my 2
>cents.  Willard Smith, Tacoma, WA.
>
>About how much more torque would be required for using bolts in an
>engine head vrs. the regular studs?  (One for the  experts!)   John W.
>
>In the wide-open spaces of NE  Oregon
>
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>************************************** See what's free at http://www.aol.com.
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                    In the wide-open spaces of NE Oregon