Stu-
Spark plug torque is usually what the manufacturer of the plugs recommends,
based upon the type of gasket & plug seat. For the Champion plugs I use, it is
NO anti-sieze, even though the heads are aluminum, hand tight, plus 1/4 turn.
For peace of mind, I usually tighten a little more, but less than 1/2 turn.
Read the plug box, especially the inside where the guarantee is written. See the
mfgr's web site for tech info.
Jim Stuart
Stuart Goggin wrote:
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>
> I know it's probably a stupid question, but for some stupid reason I cannot
> find any information on how tight to tighten a Range Rover v8's spark plugs.
> there must be some torque value or information somewhere. I have never
> had an alloy head engine before so have no idea how tight is right ;-)
>
> I had a weird ticking sound the other day, it only occured when I took my
> foot off the throttle. Sounded just like a loose spark plug. But as I
> have only just had the thing serviced, how could a loose plug be possible??
> Well the plug was about half way out of the head!!!!! I suspect it has
> done some damage to the aluminium head threads as they look a little worn.
> So the question is how tight should these plugs be tightened. And the
> second question is how hard should I kick the arse of the mechanic who
> installed them..... Bit peeved about the last service done on it, lots of
> irritating things, like a sump plug done up so tight I had to use a
> hydralic jack and a 2ft breaker bar to undo, The car lifted about 12 inches
> before the sump plug moved. After that I decided to do all the servicing
> myself...
>
> Stuart
>
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