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Registered
Join Date: Jul 2001
Location: Suntree, Florida, USA
Posts: 2,261
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Time Lapse Lapping Cylinders
The 1970 had no head gaskets / flame rings. So... gotta make sure the sealing surfaces mate properly.
This might be a boring video if it wasn't time lapsed!!! 
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JB - BreitWerks www.breitwerks.com 321-806-8664 Engine Rebuild & Restorations |
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05-13-2015, 06:32 PM
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Under the radar
Join Date: May 2007
Location: Fortuna, CA. On the Lost Coast near the Emerald Triangle
Posts: 7,129
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I thought I was the only one to think of doing that.
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Gordon ___________________________________ '71 911 Coupe 3,0L outlawed #56 PCA Redwood Region, GGR, NASA, Speed SF Trackrash's Garage :: My Garage |
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05-13-2015, 08:57 PM
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Try not, Do or Do not
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The Mahle cylinder sealing surface is not flat (tapered by design) on cylinders with no gasket/ sealing ring so lapping them is actually counter productive. Interesting idea though.
It was done on the 2.0 cylinders but those have an entirely different design.
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Henry Schmidt SUPERTEC PERFORMANCE Ph: 760-728-3062 Email: supertec1@earthlink.net |
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05-13-2015, 09:59 PM
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Registered
Join Date: Jul 2001
Location: Suntree, Florida, USA
Posts: 2,261
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Yeah, I hear ya Henry. But I didn't lap them flat. Just knocked down the high spots that showed with the Prussian blue. Just a little rub a dub dub to get them back in line.
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05-13-2015, 10:01 PM
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My Garage
1971 Porsche 911
Baja Bug
Porsche
Retor 911
Scarab
Riley
