If the exhaust valves are "going bad", I'll go out on a limb and suggest
that other things are also going bad. Patch repairs are rarely a wise
consideration. Once we get things apart and patched, we find the next
weakest link in the chain..... and so on and so on...
FWIW, bad valve seats and faces wont cause smoke.... bad exhaust valve
guides may but not usually cause smoke.... bad intake valve guides nearly
always cause smoke but are not the only reason for smoke...
Generally speaking you pull the heads off and take them to your local
machine shop. Or you can just buy rebuilt heads and install those. But like
Jim told you, if the guides are bad the rest of the engine is also probably
worn. I'd bet good money that you will still have your "smoke" problem after
your guides are fixed.
That's exactly right.... This motor is over 20 years old. I would guess that
there are many other components showing signs of advance wear and, if these
are not addressed at the same time, will come back to haunt the original
Doing it right isn't cheap... doing it piecemeal is even more expensive, not
to mention frustrating. To borrow a term from the woodworkers.... do it
right and only cry once...
I think you guys worry too much.:) I wouldn't put rebuilt heads on it if
the compression was low or it knocks or something but....I would check
the price of a rebuilt long block verses just heads and decide from
there I guess. Do a compression check wet and dry and if the bottom end
is good and the price makes since, just do the heads...
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