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Old 03-20-2011, 07:08 PM   #7
Wirespokes
Beemerholics Anonymous
 
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Joined: Jul 2002
Location: Jackson's Bottom Oregon
Oddometer: 7,796
Please fill out your profile so we can see where you're from. It'll help us answer some of your questions as well.

Valve recession is due to the seats being too hard, not too soft. And normally if they're changing slightly it's not a big deal. With your larger gap of .008" they should do fine.

But, if they're not, and they keep receeding at .oo4 or .oo5" a thousand, then it's probably time to consider replacing or repairing the heads. Don't push it, or run it hard in hot weather and you'll do fine till you've saved up the cash to renew or replace.

It's been speculated that broken valves could be the result of worn valve guides, so keep that in mind.
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