Hydro-idi
Full Access Member
Thanks for the generous offer Gary! Might take you up on that but I might try a straight edge and feeler gauges first & see where that gets me
Fresh Reman Engine Ticking
- Thread starter Hydro-idi
- Start date
Thanks for the generous offer Gary! Might take you up on that but I might try a straight edge and feeler gauges first & see where that gets me
Also they make replacement valves with a thicker margin for sunken seats.Something we dont need ,especially if surfacing decks and heads. Cheapo quickie fix for some shops. These engines can be sunk a long way in the seats before hard starting is an issue.
Zero out a dial indicator on deck swivel mag so indicator is above piston bring piston to tdc read indicator.
JM0.030"W
Hydro-idi
Full Access Member
That's interesting information. Thanks for sharing I didn't know that.
Hydro-idi
Full Access Member
Good idear Al thx!
Hydro-idi
Full Access Member
Ok so I measured the piston protrusion to deck. It is .020 so I think we are good there. Looks like this is on the machine shop who did heads now.
IMO, everyone should have one of these in their tool box.
you can find them a little cheaper, but not very precision like.
but the average joe can deal with +/- 0.002
http://www.ebay.com/itm/Mitutoyo-12...219999?hash=item4d3d6fd11f:g:e8sAAOSwo3pWgyoe
i buy these from MSC 125$ with calibration certs, and they still are no good for .001, but i deal with .0002's
you can find them a little cheaper, but not very precision like.
but the average joe can deal with +/- 0.002
http://www.ebay.com/itm/Mitutoyo-12...219999?hash=item4d3d6fd11f:g:e8sAAOSwo3pWgyoe
i buy these from MSC 125$ with calibration certs, and they still are no good for .001, but i deal with .0002's
Hydro-idi
Full Access Member
And I just checked the piston protrusion on my old short block and it measures out to exactly .020 too. What the hell is going on here??
the cam....
due to the higher lift cam, the valves are protruding into the "combustion area" more.
or you used different head gaskets.
you can always bring the head by and i can mic the valves for you....
perhaps, when you got them inspected they took some metal off the deck of the heads?
due to the higher lift cam, the valves are protruding into the "combustion area" more.
or you used different head gaskets.
you can always bring the head by and i can mic the valves for you....
perhaps, when you got them inspected they took some metal off the deck of the heads?
Hydro-idi
Full Access Member
Same felpro head gaskets. And they didn't take any more material off of heads when I brought them in. Thanks for offer Brian but I'm on my way up to Sacramento. Got 3 heads in back of truck lol.
So the only other thing this could have been is the camshaft I am guessing. That and maybe weak valve springs?
So the only other thing this could have been is the camshaft I am guessing. That and maybe weak valve springs?
icanfixall
Official GMM hand model
If a head was milled below 4.975 that only means the head is at the minimum thickness measured from the machined deck surface to the valve cover gasket machined area. The valves will clear the pistons if they are within specs. Only if the valves are not sunk into the head seats correctly will the valves POSSIBLY contact the pistons. Measuring the pistons above the deck of the block can only be done correctly from the very center of the piston at tdc. This is why the piston to deck tool is so necessary. I will search for the pic and try to post it here later.
This is what I was referring to. I purchased mine from Northern Tools some time ago but this is the idea.
http://www.ebay.com/itm/B-B-40100-U...:g:O-kAAOSwGvhT0Bza&item=400746292813&vxp=mtr
This is the tool I have from Northern Tools. Its red with the magnets on the feet. Its stupid simple to use.
http://www.bing.com/images/search?q...ef935935a116b3d0e05c8a8ebaf2913bo0&ajaxhist=0
This is what I was referring to. I purchased mine from Northern Tools some time ago but this is the idea.
http://www.ebay.com/itm/B-B-40100-U...:g:O-kAAOSwGvhT0Bza&item=400746292813&vxp=mtr
This is the tool I have from Northern Tools. Its red with the magnets on the feet. Its stupid simple to use.
http://www.bing.com/images/search?q...ef935935a116b3d0e05c8a8ebaf2913bo0&ajaxhist=0
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Hydro-idi
Full Access Member
Just measured all valve recession with my cylinder heads at Brian's. They all are within spec......
Hydro-idi
Full Access Member
The only thing that seems to be different is the torque cam at this point.
