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dBDawg
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VBMWMO #8575
Joined: 01/18/2013
Posts: 53

Anyone know where I can get valve lifters? I have one missing and the rest are pitted with holes. Thanks

VintageSalesand...
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VBMWMO #7368
Corona, CA
Joined: 03/24/2008
Posts: 295
Lifter

I have a lifter for you - also pitted - but you can send them to Cycleworks.net and have him weld the ends up and regrind them.

Jeff

schrader7032
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VBMWMO #7032
San Antonio, TX
Joined: 10/27/2006
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Just for my own education, is

Just for my own education, is there any more treatment than welding metal and grinding/smoothing? I thought there was a special hardening process done to the face of the lifters. It's a small thickness to which its done, meaning you can't grind existing faces to remove the pits because you'll go through this hardness layer.

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

VintageSalesand...
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VBMWMO #7368
Corona, CA
Joined: 03/24/2008
Posts: 295
Lifters

hi,

My understanding is that special hard material is welded to the face after prep. Then it is ground to shape, perhaps a case hardening operation is performed after grinding? Not sure. Dan at Cycelworks.net can tell you.

Jeff

dBDawg
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VBMWMO #8575
Joined: 01/18/2013
Posts: 53
Jeff, I'll definitely let you

Jeff, I'll definitely let you know once I hear from someone here on the east coast. hopefully in a day or so. Thanks for offering.

I've been looking into this just in case I have to make new ones. This is what I've gathered so, far. Feel free to dispute anything that seems wrong. It's only about 4 days of research.

Wether it's refurbished or made from scratch, it has to be ground down and/or surface hardened. To a Rockwell hardness of 55 to 60. I just realize I didn't write down what scale that is. Maybe someone might be able to chime in with that. Apparently surface hardening is enough but it's only amounts to about 0.020" thickness. Mine are pitted much more than that, so they'll have to be re-hardened once cleaned up. The cam face should also be finished between RA 7 to 10.

I feel like with all the guys that have redone these prewar engines, they'd make a manual with drawings and specs.

brown3459
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VBMWMO #3459
Joined: 10/27/2006
Posts: 74
If the profile is not worn

If the profile is not worn then minor pitting is not detrimental and actually may be beneficial in oil retention

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Barry Brown
Canada

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