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Discussion Starter · #1 ·
I posted this on the LLY section but am not getting replies so am posting here:

I have a coolant leak (head gaskets). Took off the heads and everything looks good. They're at the machine shop getting checked for cracks and surface flatness.

Questions:
Can I check the valves myself and what to look for?
How do I press the new valve stem seals on?
Should I lap the valves and if so can you recommend a lapping fluid?

Lightly used 2005 LLY with 240,000 miles

Thanks!
 

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I would think the machine shop that's checking your heads could check and check/grind the valves, install new stem seals and anything else needed once the heads are known to be OK.
 

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Discussion Starter · #3 ·
The heads passed the pressure test and that cost $180

Surfacing to remove the gouges from the compression rings on the gaskets is another $180

They will check everything else for between $300 to $500 in labor. Just wondering if I can realistically do this myself. Truck runs great and doesn't smoke.
 

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Re your questions:

Can I check the valves myself and what to look for?
How do I press the new valve stem seals on?

The answer can be found on Youtube videos. I think any person who works carefully can accurately do both of these items. No need to pay someone to do these.



Should I lap the valves and if so can you recommend a lapping fluid?


You should lap the valves. I don't know any specifics about valve grinding paste but I'm sure that you can find the answer on Google.
 
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