[TR] Valve Stem Wear

[Cliff Hansen]

I’d suspect the valves and not replace the rockers unless they show a wear pattern. The softer of the two metal surfaces would deform.

Just my $0.20 ($0.02 after inflation)

Cliff


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From: George Haynes<mailto:ghaynestr4 at aol.com>
Sent: Sunday, May 2, 2021 12:43 PM
To: triumphs at autox.team.net<mailto:triumphs at autox.team.net>
Subject: [TR] Valve Stem Wear

Had the rocker shaft off my TR4A recently and found several valve stem tips pitted and peened over.
Metal was displaced so a finger nail could feel it.  Would you call it Galling?  Head was done about 35K miles ago.

I've never seen this before. Stock Crane camshaft, valve springs and tubular pushrods. Valvoline VR-1 20W-50 oil.

The rocker arm pads have been ground at what was supposed to be the correct radius.  Don't know how to verify that.

Has anyone experienced this?  How does it happen?  My inclination is to replace the all valves and rockers.

Thanks for any insight!

George Haynes
CTC55423LO

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