TimD Posted September 6, 2016 Share Posted September 6, 2016 I'm finally getting around to putting my engine back together, when inspecting the pistons I've noticed they all have a B stamped on them. But, 3 have the number 1 stamped, and one has a number 2. Any ideas what they mean? Quote Link to post Share on other sites
TimD Posted September 6, 2016 Author Share Posted September 6, 2016 Answered my own question. The block is also stamped with corresponding numbers, in my case: Cyl 1: 2 Cyl 2: 1 Cyl 3: 1 Cyl 4: 1 Quote Link to post Share on other sites
gorganl2000 Posted September 6, 2016 Share Posted September 6, 2016 pistons come in 3 sizes stock....so the builder/you basically know what to order when you need to replace---assuming everything is within original tolerances and the builder is using standard pistons as you've seen,,,its also stamped on the block by each cylinder Quote Link to post Share on other sites
Socks Posted September 7, 2016 Share Posted September 7, 2016 Bore diameters:STD mark 1 = 74.000-74.010mmSTD mark 2 = 74.010mm-74.020mmSTD mark 3 = 74.020mm-74.030mmLimit before rebore = 74.23mmPiston diameter:STD mark 1 = 73.900-73.910mmSTD mark 2 = 73.910mm-73.020mmSTD mark 3 = 73.920mm-73.930mm Quote Link to post Share on other sites
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