450 valves

Tinks · Feb 17, 2018

I have ground valves on several 400 heads but I noticed on the first 450 that I am doing that the exhaust valves have a reduced stem size next to the head of the valve. Is this normal and if so why ? Thanks for any info !!!!

pete 23 · Feb 17, 2018

I would say that the stem has eroded away which is not uncommon when operated under certain conditions. Used to run into this now and then but it was not a problem limited to a 450. I remember one 400 that that made me wonder why they didn't pull the heads off the valves.

Tinks · Feb 17, 2018

so should I replace the valves it is only on the exhaust valves ?

rustred · Feb 18, 2018

any stem damage and valve should be replaced. dont want a dropped valve.

OldFarmall450 · Feb 18, 2018

Tinks, when I had the head on my 450 rebuilt I ran into the same thing. The machinist said I had to many valves needing replacing to order A la carte, so I went with a new valve train. Money well spent, IMHO.

450 valves

Tinks

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pete 23

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Tinks

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rustred

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OldFarmall450

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