1G Are these exhaust valves toast?

[AWD-Tony]

Should I bother trying to lap these?

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[Kryndon]

I actually can't see from the blur, is that pitting or carbon buildup? If carbon, try a brass wire wheel or scotch brite + drill method.

If it's deep pitting I'd say have them re-ground. Margins look healthy so it should be machine-able. Trying to lap them like that might still leave a few pitts here and there which is a no-go.

 

[AWD-Tony]

I actually can't see from the blur, is that pitting or carbon buildup? If carbon, try a brass wire wheel or scotch brite + drill method.

If it's deep pitting I'd say have them re-ground. Margins look healthy so it should be machine-able. Trying to lap them like that might still leave a few pitts here and there which is a no-go.

Thanks Kryndon! I used drill on brass wire wheel. They’re pitted but not deep, maybe 1mm.
Re-ground is done by machine shop?
Idk if this pictures is any better.

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[arrowhead]

They seem to be too far gone, if machine would leave a very thin margin.
You must also look at seats, probably as bad.

 

[AWD-Tony]

Seats aren’t bad

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[motomattx]

I would toss those, if your on a budget a automotive machine shop can reface them.

 

[AWD-Tony]

I would toss those, if your on a budget a automotive machine shop can reface them.

Thanks Matt!

 

[Bud92gsx]

Or engnbldr on Ebay sells legit OEM plus oversize valves and guides. That's what I used when I rebuilt my head. Great prices great dudes to deal with.

 

[AWD-Tony]

Or engnbldr on Ebay sells legit OEM plus oversize valves and guides. That's what I used when I rebuilt my head. Great prices great dudes to deal with.

Thanks Bud! I’ll be searching the web tomorrow.

 

[Bud92gsx]

Thanks Bud! I’ll be searching the web tomorrow.

Here is his email actually. [email protected]
Wink

 

[AWD-Tony]

Here is his email actually. [email protected]
Wink

I couldn’t find them on eBay. I’ll shoot them an email tomorrow.
Thanks again Bud!!

 

[AWD-Tony]

Here is his email actually. [email protected]
Wink

Looks like he retired.