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Head gasket must have been bad for a while...

Absent Minded Farmer

Absent Minded Farmer

Well-known Member
Location
Gehl Country, Wis.
At least I think so. My H sounds like a new tractor. Runs smoother than before the gasket went. I had an occasional put-putter in the exhaust shortly befor I cut my last crop of hay. Didn't effect the performance in the least, just didn't sound right.

Should I recheck the head torque tomorrow & then warm up the engine & check tappet clearence? Is tappet clearence taken from an engine that has been warmed to operating temerature or just warm? Anything else I'm forgetting?

Thanks, everyone, for the help!
Mike
 
Yes, retorque and reset the valves. I ignore the warmup because I can't work fast enough to finish it before it cools off. In other words if temperature really makes a difference, then every valve will be done at a different temperature. Some say it needs to be at operating temperature, some not. I have also read that as long as the air temp is not real low, you can consider it warm. Maybe someone will give a more definitive answer. I have fixed an occasional miss by slightly changing the timing. In other words timing by ear, another thing that some say is ok, others say you will get it too far advanced. I haven't had a problem timing that way.
 
[b:80a5fd83e0]My understanding is the difference between a cold and warm adjust spec is .002"


Maxx[/b:80a5fd83e0]
 
(quoted from post at 18:33:31 10/24/11) [b:3048e33424]My understanding is the difference between a cold and warm adjust spec is .002"


Maxx[/b:3048e33424]
Click to expand...

I go with .001 loose when adjusting valves cold.

I wouldn't retorque the head tomorrow unless you got it up to operating temp today. In other words, I would get it warm once before retightening it again. I certainly wouldn't hurt to do it now and then get it warm and do it again. You could be like me and break off a valve hold down stud...that would be a reason not to do it "too much."
 
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