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Location: Northern Virginia
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Question About Piston/Cylinder Stamp Marks
I know where to find the size designation (for spec'ing purposes) on my pistons and cylinders, but I've also noticed stamped numbers corresponding to where each of my pistons and cylinders belong. That is, each piston and cylinder has a tiny "1, 2, 3 and so on" designating their position around the engine. Did the factory do this or a rebuilder?
The engine I'm referring to is a later-cased '83 3.0. Thanks! Brian
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'82 SC Targa '83 SC Cabriolet Last edited by 1982911SCTarga; 03-25-2008 at 04:10 PM.. |
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03-25-2008, 04:04 PM
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Less brakes, more gas!
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pic?
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 Michael '82 Euro SC 'Track Rat' 22/29 Hollows, 22/22 Tarrets, Full ERPB F/R, Rennline Tri Brace, Glass bumpers, Pro 2000's, 5 pts, blah blah blah '13 Cayenne GTS |
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03-25-2008, 04:53 PM
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Here are pics for number four (follow the pencil point):
  Brian
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03-25-2008, 05:16 PM
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I've never seen the cylinders marked for position except from a rebuilder. I suspect that is the case here.
-Andy
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03-25-2008, 09:08 PM
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Cool, thanks, that's what I figured.
Brian
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03-26-2008, 04:59 AM
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While cleaning my cam towers, I've found "1 ... 2 ... 3" and "4 ... 5 ... 6" stamps on those as well. At least it verifies my own labeling system for reassembly, but why not just an R and L for right and left?
Brian
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03-28-2008, 05:35 AM
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Less brakes, more gas!
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Interesting. +1 on rebuilder. They probably had to match piston and cylinder diameter groups and then sorted the piston pairs by wiehgt for reassy. Or wanted to keep the p/c pairs matched. I just used a hand scribe, but the stamping looks nice and is more permanent. I believe Anchor Atlantic stamps the heads with the owners name so its not an uncommon thing to do.
Best regards, Michael
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Michael '82 Euro SC 'Track Rat' 22/29 Hollows, 22/22 Tarrets, Full ERPB F/R, Rennline Tri Brace, Glass bumpers, Pro 2000's, 5 pts, blah blah blah '13 Cayenne GTS |
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03-28-2008, 06:18 AM
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Ugly Betty
