Chunk of piston ring found in engine oil
02-21-2012, 01:06 PM
#64
Nordschleife Master
02-21-2012, 04:14 PM
#65
02-21-2012, 07:36 PM
#66
Nordschleife Master
02-22-2012, 04:42 AM
#67
02-22-2012, 06:46 AM
#68
When beer is a 964, this one....
http://en.wikipedia.org/wiki/Highland_Park_Single_Malt
......is running the equivalent of Motec and a set of well timed cams!!!
;-)
http://en.wikipedia.org/wiki/Highland_Park_Single_Malt
......is running the equivalent of Motec and a set of well timed cams!!!
;-)
02-22-2012, 12:41 PM
#69
Nordschleife Master
02-23-2012, 04:08 AM
#72
02-23-2012, 12:52 PM
#73
Nordschleife Master
I'll dig up my beer testing equipment and be right over .
http://www.google.com/imgres?q=crazy...w=1280&bih=681
http://www.google.com/imgres?q=crazy...w=1280&bih=681
03-05-2012, 10:21 PM
#74
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At long last, the follow-up message.
Chris at Chris' German dropped the engine and examined the bank and #5 cylinder - the one reporting 85% compression loss. Turns out that stiff valves were to blame for the compression loss, and fortunately they weren't burnt out. The chunk of piston ring was indeed piston ring - but not from the 2008 top end rebuild. That cylinder was just fine - no parts missing. So, this really was a case of "internal FOD" - foreign object damage (or potential damage, as the case turned out). Some chunk from previous work had been rattling around in there for, well, years. Incredible that this wasn't picked up in the '08 top end.
Compression is back up to normal after reassembly and this whole ordeal of elaborately multiplying by one, mechanically and certainly not financially speaking, is behind me. At least I now know the core is very well sorted out.
Thanks for all the enormously enlightening speculation, debate, and well, entertainment in the thread. I'll try to follow up with a picture of the debris when I finally get to the shop tomorrow or Wednesday to pick up the car. (At this point I think I'll just put it under my pillow and see if there's an RS America waiting in the garage when I wake up.)
Chris at Chris' German dropped the engine and examined the bank and #5 cylinder - the one reporting 85% compression loss. Turns out that stiff valves were to blame for the compression loss, and fortunately they weren't burnt out. The chunk of piston ring was indeed piston ring - but not from the 2008 top end rebuild. That cylinder was just fine - no parts missing. So, this really was a case of "internal FOD" - foreign object damage (or potential damage, as the case turned out). Some chunk from previous work had been rattling around in there for, well, years. Incredible that this wasn't picked up in the '08 top end.
Compression is back up to normal after reassembly and this whole ordeal of elaborately multiplying by one, mechanically and certainly not financially speaking, is behind me. At least I now know the core is very well sorted out.
Thanks for all the enormously enlightening speculation, debate, and well, entertainment in the thread. I'll try to follow up with a picture of the debris when I finally get to the shop tomorrow or Wednesday to pick up the car. (At this point I think I'll just put it under my pillow and see if there's an RS America waiting in the garage when I wake up.)