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KTL KTL is offline
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Join Date: Sep 2000
Location: Frankfort IL USA
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Also, I think these housings are not all that stable dimensionally. I've put a few junk ones on a flat piece of glass or a large hunk of quartz (taken from a rehabbed kitchen) and they take a bit of sanding to get the surfaces level. John @ Costa Mesa R&D seems to think they need a resurface. But I think he's also doing that along with some other fixes to later 993 type housings.

https://www.youtube.com/watch?v=PTxkj1QkCYY

https://www.youtube.com/watch?v=aWLsKUJCy0A

All that said, I think their dimensional instability allows them to twist into shape when mounted on the heads? I don't know about that. but I do know it's not unheard of for a cam to bind inside the housing
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Kevin L
Present: '86 Carrera, '79 911SC widebody conversion rolling racecar shell
Past: '87 Carrera
Old 08-01-2016, 06:38 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #11 (permalink)