If it ain't broke don't fix it... But, You can check if there is too much
clearance between the valve and guide by measuring the amount that the valve
wobbles in the guide. A shop may reccommend ferrulling sp? the guides which
I believe is just like threading the guide so that the peaks of the thread
take up the clearance problem. I asked my shop to do this when I had work
done to the head but they insisted it didn't need it. I get a nice little
plume of blue smoke when I start the car after its been sitting for a while
from the oil leaking down the guides. If anything, I would magnaflux it at a
shop to check for cracks and ask their advice. ~$20 to magnaflux a head
Subject: Valve guides
Date: Friday,May 03,1996 12:37PM
Since I have to pull the head on 78 MGB to replace a leaky head gasket, I
had a question on valve guides. I feel they are leaking and need to be
replaced. But, do I or should I replace the valves at the same time.
Engine runs great and the compression is pretty good. If I don't want to
mess with the valves if I don't have to.
Jeff from San Diego that does drive his MG around town and autocross's it.