cylinder bore size question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

grnddwn · 11-28-2003, 10:17 PM

What is the easiest way to tell if my block has been bored over

frogsmakr · 11-28-2003, 10:39 PM

look for .30 or .60 or similar stamped on the pistins

jmanz69 · 11-28-2003, 10:47 PM

The stamp will be on the top of the pistons, usually under whatever carbon crud is on them. If the pistons are gone, then go to the nearest parts store and buy a cheap dial caliper. Then use it to measure the bore. It won't be exact, but it will let you know if it's oversized. a 350 small block has a standard bore of 4.000 inches. Check all the way around the cylinder, as the bore may be slightly out of round if it's really worn. Best way is with the pistons as stated above.

grnddwn · 11-29-2003, 12:20 AM

Thanks

11-28-2003, 10:17 PM	#1
grnddwn belly dragger Join Date: Feb 2002 Location: sherwood park AB. Canada Posts: 694	cylinder bore size question What is the easiest way to tell if my block has been bored over

11-28-2003, 10:39 PM	#2
frogsmakr Registered User Join Date: Feb 2000 Location: Sherwood AR Posts: 553	look for .30 or .60 or similar stamped on the pistins __________________ 67 C-10 shortwide '06 Triumph Thruxton '09 Harley 'Lectra Glide '95 Z-71 two door Tahoe

11-28-2003, 10:47 PM	#3
jmanz69 Careful, they attack... Join Date: Aug 2001 Location: Waterford, MI, USA Posts: 1,107	The stamp will be on the top of the pistons, usually under whatever carbon crud is on them. If the pistons are gone, then go to the nearest parts store and buy a cheap dial caliper. Then use it to measure the bore. It won't be exact, but it will let you know if it's oversized. a 350 small block has a standard bore of 4.000 inches. Check all the way around the cylinder, as the bore may be slightly out of round if it's really worn. Best way is with the pistons as stated above.

11-29-2003, 12:20 AM	#4
grnddwn belly dragger Join Date: Feb 2002 Location: sherwood park AB. Canada Posts: 694	Thanks



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