The only use once bolts I know of are head bolts for engines with aluminum
heads. We always reuse manifold and valve cover bolts and never had a failure.
B1LLYW@aol.com wrote:
> I understand that there are certain bolts, for example intake manifold bolts,
> that should be replaced and not re-used. I guess they can be torqued only
> once, become stretched, and cannot be reliably used again.
>
> Does anyone know if our valve cover bolts are the same way? I seem to have a
> recurring problem with valve cover leaks that I never had until I built this
> motor. I've got the MOPAR Magnum valve covers with the heavy duty gaskets.
> These are generally pretty sturdy and not prone to leaking. I tightened the
> bolts and now I'm getting a leak again.
>
> I noticed that MOPAR Performance does sell a bolt kit for these covers, which
> makes me think these may be "torque-once" bolts. Opinions on this?
>
> Bill White - http://www.moparforme.com
>
> THE BIONIC DODGE - 2000 Ram QC 1500 Sport, 408 Stroker - All Motor & Staying
> That Way
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