Piston clearance

stevieg

New member

Equipment
D640
Oct 21, 2024
1
0
1
Portugal
Hi guys,could anyone tell me if the piston should be slightly raised from the block at tdc.i ask as have had the block skimmed and bored and new oversized pistons which I am assured have been skimmed the same amount as the block.i have installed pistons and notice they are slightly proud of the block.many thanks
 

North Idaho Wolfman

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Staff member
Lifetime Member

Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
29,867
6,070
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Sandpoint, ID
Did you get a number for the amount they took off the block?
You really need that number because not only do you need it for the head gasket (there are shims) you will need it for under the injection pump, as that sets the timing.