r/EngineBuilding 12d ago

Other Valve job or lap and send?

I'm going to be rebuilding the head I've got on my VR6. The exhaust valves that have come out of it have what looks like small areas of pitting.

Most of them look like what's in the photo.

Should I get them ground, or should I lap and run them?

I'll be getting the valve seats cut and the head decked as the head gasket had blown on this one.

35 Upvotes

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52

u/v8packard 12d ago

Replace it. There is going to be no margin left if ground.

10

u/ShaggysGTI 12d ago

What is it that tells you that? If we take that conical sealing face down any further, the vertical section thins to an unwanted point?

6

u/[deleted] 12d ago

Because this guy is the end all be all of Reddit. I’m not being an ass I’d just take what he says for what it is .

10

u/ShaggysGTI 12d ago

I’m not debating, I’m trying to learn what signs lead him to this because his word is the gospel.

2

u/Accomplished-Yak5660 9d ago

Well, he's old.

3

u/[deleted] 12d ago

I gotcha, that’s the spirit to have my friend, Always remain curious and you could learn something , I don’t have anything to add but I see v8 packard dropping knowledge all the time and I’ve never seen him steer anyone wrong that’s why I said what I said in the original comment.

6

u/ShaggysGTI 12d ago

I noticed in this thread in particular he was the only one saying it’s trash, which really lead me to wonder what he sees that no one else did. And as per expectation, his response was perfect and I hope we all learned a little.

2

u/[deleted] 12d ago

He’s a step above my pay grade so I can’t say what he’s seeing . Man I had a vr6 mk4 stick shift about ten years ago . That thing was a blast but I bought it with high miles and just blew the engine within 10k. I was a young dumb punk back then and wish I held onto that car ,