Hi, '67 BJ8. First query here, although I've been working back from page 340 or so for the past several weeks.
Anyway, I took the cylinder head off last week to check valves, seats guides etc and replace disintegrated seals. The head is in the machine shop for light skimming and flattening (minor blow-through in the gasket) and a basic valve job.
However, I noticed 2 pistons are in the wrong way round - #2 and 4 have the "front" stamp facing backwards, the others are OK. I haven't noticed any rattles or slaps. Compression on cold cranking earlier gave all about 170psi rising to 190psi with oil.
The pistons are 30 thou oversize but I don't know when the "rebuild" was done.
Q. the machinist says I should turn them round, is this necessary? I took the sump off this morning but have not yet taken the offending pistons out.
Can I simply take them out, take them apart, turn them round, maybe rotate the rings and put them back or will they have worn in to the configuration of the cylinders?
Should I replace the rings?
Thanks.
Anyway, I took the cylinder head off last week to check valves, seats guides etc and replace disintegrated seals. The head is in the machine shop for light skimming and flattening (minor blow-through in the gasket) and a basic valve job.
However, I noticed 2 pistons are in the wrong way round - #2 and 4 have the "front" stamp facing backwards, the others are OK. I haven't noticed any rattles or slaps. Compression on cold cranking earlier gave all about 170psi rising to 190psi with oil.
The pistons are 30 thou oversize but I don't know when the "rebuild" was done.
Q. the machinist says I should turn them round, is this necessary? I took the sump off this morning but have not yet taken the offending pistons out.
Can I simply take them out, take them apart, turn them round, maybe rotate the rings and put them back or will they have worn in to the configuration of the cylinders?
Should I replace the rings?
Thanks.