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Losing lash :(

Posted By 58F600 5 days ago
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58F600
Posted 5 days ago
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Supercharged

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So we finally got to put a little time under the hood and do some long overdue maintenance.

I did hook up the oil pressure idiot light and it kinda works 😂. We do have some oil pressure!

I adjusted the valves and found all the exhuast valve had lost all their lash. We don't know much about this engine, but from having the pan off, the timing chain is super tight. It's nice and clean. Mains have a little wear. It has two visually different rockers on one side vs the other. And one rod that looks different than the rest. I'm guessing a rural Napa rebuild 30 years ago and then not much use around the farm until we strapped a turbo on it and went cross country.

The heads are 62 variants. I forget exactly.

For those running boost, is this normal for the first 10k miles? Or do the seats erode? Valve stretch? We really didn't turn it past 3800rpm, but it does pull long hills at 17k lbs, and 12psi.

Just wondering what I'm in for. I've always been a little concerned about the exhuast valves. I'm sure they are stock or super cheap stock replacements. Our Turbo inlet EGTS are routinely 1500° plus. Plugs look great.



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