I see a lip on the outside edge of the valve, if you're not going to pay a shop for a valve job just clean and run as is...
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Possible Engine Build for my 93 Truck
- Thread starter dbrannon79
- Start date
dbrannon79
I'm getting there!
I might have to do that. I did make some progress on the one intake valve in the last photo. I used some of the jewelers rouge and a dab of oil and did a quick couple of passes. also did a leak test with the compressed air. it's only leaking on the side that's between the valves on the head. in the pic it polished up almost half way around leaving the area where I see it leaking.
I've only done maybe two sessions about 5 minutes each on this valve using the lapping compound (sessions were apply compound lap, wipe off and reapply compound. do it again)
I've only done maybe two sessions about 5 minutes each on this valve using the lapping compound (sessions were apply compound lap, wipe off and reapply compound. do it again)
dbrannon79
I'm getting there!
I looked on RA but they don't list new valves. I had wondered if getting new ones would lap in and seal better if these have a lip.
correction: they do list them. exhaust valves are about $30 ea and intake are about $8 each.
I suspect that there not far from sealing all the way around, but I don't want to keep lapping if they are out of round or not perfectly straight. any advice on a poor man's valve job?
correction: they do list them. exhaust valves are about $30 ea and intake are about $8 each.
I suspect that there not far from sealing all the way around, but I don't want to keep lapping if they are out of round or not perfectly straight. any advice on a poor man's valve job?
Last edited:
dbrannon79
I'm getting there!
Ok Update: I seem to be getting somewhere now.
I figured I would keep trying on one valve. intake for #8. I took my homemade doodad I made to fit the suction cup and chuck it into my drill. applied some lapping compound and went at it. spun the drill slow in both directions while lifting every couple of seconds same as hand lapping. I went at that for a little longer than I would do doing it by hand. then cleaned it all up and used the jewelers rouge to do a polish on them. again for a little longer.
wiped everything down real good, slid the valve back in the hole, spitzed some windex on the top and applied some air pressure while holding the valve down by hand. it's sealing!! YAY!!
I figured I would keep trying on one valve. intake for #8. I took my homemade doodad I made to fit the suction cup and chuck it into my drill. applied some lapping compound and went at it. spun the drill slow in both directions while lifting every couple of seconds same as hand lapping. I went at that for a little longer than I would do doing it by hand. then cleaned it all up and used the jewelers rouge to do a polish on them. again for a little longer.
wiped everything down real good, slid the valve back in the hole, spitzed some windex on the top and applied some air pressure while holding the valve down by hand. it's sealing!! YAY!!