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measuring piston groove wear

blacksnapon

blacksnapon

Moderator
Staff member
9,461
301
waynesville,mo.
technician "A" says piston ring groove wear can be measured with a ball gauge. Technician "B" says ring groove wear can be measured with a new piston ring and a feeler gauge. Who is correct? 1) A only 2) B only 3) Both A&B 4) neither
 
mrfixit

mrfixit

Chief Chaotic Engineer
8,334
171
Malfunction Junction, Fidelity MO -or- Mound City,
Technician "B" is correct, insofar as the "NEW" ring is the identical ring as previously installed :) you use the new ring to be able to detect shouldering and tapering in the groove with a feeler gauge.
 
6L PWR

6L PWR

Kansas Chapter member
7,961
255
Osage Beach, MO
You don't want me to tell you what I think a ball gauge is!! I don't know on this either. I'm not into that part of engines. I just turn the bolts my friend tells me to and he does all the thinkin' and planin'.
 
mrfixit

mrfixit

Chief Chaotic Engineer
8,334
171
Malfunction Junction, Fidelity MO -or- Mound City,
Sheesh! Your friend should have HIS name painted on the side of your truck, then!
 
econo61

econo61

head pervert
559
30
okla
ah hell, i'll go wit #4 so we can have them all on here!
 
mrxlh

mrxlh

Oilfield Trash
5,904
430
Stigler, OK
Both would be correct.
 
Fellro

Fellro

Moderator
Staff member
7,953
360
Iowa County, Iowa
I'm with both... The ball gauge, used properly, will indicate the actual size of the area measured, but since cylinders typically do not stay round and true, it can be deceiving. The ring will give a measurement that the ring itself will have.
 
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