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i would use a micrometer to measure the wear on the skirts and the ring lands.
you should be able to find specs online.
-FREEDOM-is cruisin at 80, windows down and listening to the perfect song-thinking"this is it" -The Beauty in the Tragedy- MECHANIC SMASH!!- (you all know you do it) Got Drop?? ;-)
Originally posted by JinormusJ
But of course
E30s are know to be notoriously really really really ridiculously good looking
The first step is a visual examination after cleaning. The edges of the grooves should be sharp. Then then you measure the width of the grooves with a gap micrometer at several points around the piston and compare that to the spec.
The car makes it possible, but the driver makes it happen.
Jim Levie, Huntsville, AL
thank you
for the help because im gonna need it doing this all on my own
Originally posted by jlevie
The first step is a visual examination after cleaning. The edges of the grooves should be sharp. Then then you measure the width of the grooves with a gap micrometer at several points around the piston and compare that to the spec.
Not having an inside mic that small, I use a feeler gauge on the old rings-
if it's not way out, I spring for new rings, and check again.
A few thou over the max spec doesn't seem to cause a problem.
That said, I've only come across a few sets that weren't so worn in the skirts as to be unusable.
But I buy junk to start with.
t
now, sometimes I just mess with people. It's more entertaining that way. george graves
Definitely ETA pistons... did the seller say they were 'i'?
I've got my old 'i' pistons laying around here somewhere, can't promise they aren't worn (never go them checked) but I'd let them go cheap. They're just laying around right now.
Tinker Engineering - 2014
Mica - 2000 BMW 323i - The one that started it all Fiona - 1975 BMW 2002 - The Definition of Project Creep Heidi - 1988 BMW M5 - The piece of BMW history Silvia - 2013 Subaru WRX - Stock, for now
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