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post #1 of (permalink) Old 09-27-2002, 03:14 PM
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Valve Question

Any one know if its possible to lap your valves while the heads are on the motor?

I was swaping springs for my BB swap and put the air hold adapter in the spark plug and I got valves with air blowing past them. Like blowing past them BAD. Seems the machine shop did a really good job seting up my heads. If anything went right in my life I would get worried. Always check everything. Dont assume that they arnt degenerates Looks like I am eating some head gaskets....

Just had to vent [img]images/graemlins/mad.gif[/img]

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post #2 of (permalink) Old 09-27-2002, 05:23 PM
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Re: Valve Question

I don't know of any mechanical method that would allow the valves to be lapped while the heads were bolted to the cylinder block. [img]images/graemlins/frown.gif[/img] I have used an electric drill motor on the valve stems to spin the valves to help lubricate the valve guides on an engine that sat for several years. I doubt my electric drill motor trick would help the seats any.
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post #3 of (permalink) Old 09-27-2002, 07:42 PM
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Re: Valve Question

Yeah, the drill method would work if you could get lapping compound on the seats some how...

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post #4 of (permalink) Old 09-28-2002, 05:56 AM
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Re: Valve Question

I think you could get the compound on easy enough through the ports. But I would be concerned as to getting it back off, not to mention that abrasive stuff ending up in the cylinders. They would probally seat in once it is run. But I don't think I would risk it. Plus, i would have the machine shop pay for my gaskets.
post #5 of (permalink) Old 09-30-2002, 07:00 AM
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Re: Valve Question

I know there aint really any way to do it without yanking the heads. I'm just going to go at it with some compound and the little suction cup dealy. This crap just pisses off [img]images/graemlins/mad.gif[/img]

Then again I was open to some majic method from motor building gurus [img]images/graemlins/wink.gif[/img]
post #6 of (permalink) Old 09-30-2002, 05:32 PM
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Re: Valve Question

I'm interesed in what the machine shop had to say about it.
I know if I did a job like that in my shop, I would be expected to pay something.
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