HOW TO CHECK DECK HEIGHT?????
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Pro
Joined: Dec 2001
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From: Renton Wa
HOW TO CHECK DECK HEIGHT?????
How do I check the deck height? I have heard of the way by using a plate bolted across the bore. But whats some other ways? involving the use of a dial indicator?
Le Mans Master
Joined: Nov 1999
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From: San Diego CA
Re: HOW TO CHECK DECK HEIGHT????? (WashingtonRacer)
How do I check the deck height? I have heard of the way by using a plate bolted across the bore. But whats some other ways? involving the use of a dial indicator?
First you set the bridge and indicator where you will measure the deck surface - set one of the dial indicators movable pointers at that measurement - then place the bridge over the cylinder so that it touches the piston at a point near a ring land. compare that measurement to the indicator you set and you should have a good idea of deck height of piston - obviously be very careful not to measure inside a dish or valve relief or to the top of a dome as these will give you a bad reading.
Real engine builders will chime in and tell you what is wrong about my description but thats the way I understand it anyway. :lol:
Drifting
Joined: Feb 2002
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From: Little Rock Arkansas
Re: HOW TO CHECK DECK HEIGHT????? (fauxrs)
What 'faux' said is essentially accurate for determining how far the piston is in the hole which will give you a rough estimate on deck height providing you know how much clearance is built into the pistons...
We use a special fixture on our boring/decking setup to accurately measure the deck height... But, you can get very close yourself by simply straight-edging the deck surface and measuring from the crankshaft centerline.
-Jeb Burnett
We use a special fixture on our boring/decking setup to accurately measure the deck height... But, you can get very close yourself by simply straight-edging the deck surface and measuring from the crankshaft centerline.
-Jeb Burnett
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From: Renton Wa
Re: HOW TO CHECK DECK HEIGHT????? (jburnett)
Okay I found a measurment of .96mm, but one problem I found was the piston could rock just a tad in the bore, so it was rather hard to get consistant measurments. so I went a 4 points 90 degrees of eachother, and had a low of .84 and the high of .96 so I guess an average between the 2 of .90. I am assuming that the rocking is normal due to the fact that I no not have any rings installed as of yet. Also I went ahead and measured the clearance between the piston and bore, and found it to be right at about .0045. This seems like a very tight clearance to me, but it is also what JE states on the specs sheet.
Le Mans Master
Joined: Nov 1999
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From: San Diego CA
Re: HOW TO CHECK DECK HEIGHT????? (WashingtonRacer)
Okay I found a measurment of .96mm, but one problem I found was the piston could rock just a tad in the bore,
