valve stem seals Q

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atwifa - 17 Jun 2005 15:52 GMT

hi all, hope someone can help. i have a '91 230te (M102), and am currently
refurbishing the cylinder head. my question is, how far down on the valve
guides do the valve stem seals go? do they push down all the way to the
bottom (ie, flush against the lower seat for the valve spring), or do they
sit about halfway down (ie, where the spring on the seal would seem to align
with the groove in the guide)?

needless to say, i didn't look at the old ones before taking them off!

any info much appreciated, as obviously i don't want to put the head back on
if i've made what would be a catastrophic error. cheers.

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CaptainW116 - 17 Jun 2005 17:25 GMT

When installing seals,make sure that a small amount of oil can pass
through the seal to lubricate the valve guides.Also note that the
exhaust and intake valve stem seals are not interchangable and also as
a friendly reminder,the head bolts on M102 are stretch bolts and should
be no longer than 122mm and if you replace they are 119mm.

> hi all, hope someone can help. i have a '91 230te (M102), and am currently
> refurbishing the cylinder head. my question is, how far down on the valve
[quoted text clipped - 7 lines]
> any info much appreciated, as obviously i don't want to put the head back on
> if i've made what would be a catastrophic error. cheers.

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atwifa - 17 Jun 2005 18:01 GMT

thanks but none of that answers my question.

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