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Fairtax4me · 10-19-2021, 09:56 AM

Wasn't sure so I took a look at a head I had in storage and to me it doesn't look like anything is wrong there, but the one I have is a 97+ clockwise engine and there are differences in the heads on some of these Fe350s.

If the exhaust guide has lifted, then you should get a machine shop to knurl a new guide and press it in. Just cramming a new one in there will probably result in the same failure in a short time.

Typically if a valve guide moves its because the engine has overheating (as in being run multiple times overheated), or there is excessive buildup on the base of the valve stem that is causing the valve to stick to the guide. Normally this results in the guide dropping (being pulled down toward the cylinder).
A lifted guide is almost entirely due to overeating.

10-19-2021, 09:56 AM	#8
Fairtax4me Bonafide Nincompoop Join Date: Dec 2015 Location: Charlottesburg Va Posts: 8,987	Re: Fe350 cylinder head questions Wasn't sure so I took a look at a head I had in storage and to me it doesn't look like anything is wrong there, but the one I have is a 97+ clockwise engine and there are differences in the heads on some of these Fe350s. If the exhaust guide has lifted, then you should get a machine shop to knurl a new guide and press it in. Just cramming a new one in there will probably result in the same failure in a short time. Typically if a valve guide moves its because the engine has overheating (as in being run multiple times overheated), or there is excessive buildup on the base of the valve stem that is causing the valve to stick to the guide. Normally this results in the guide dropping (being pulled down toward the cylinder). A lifted guide is almost entirely due to overeating.