Quick question before destroy or buy wrong , I bored out my 340 to .030 and looking at summit ring compressor non adjustable size 4.030 , is this the correct size needed ?
340 .030 bore piston
- Thread starter 72dustervs
- Start date
-
Scody21
Just send it
Get an adjustable one. Can use for other projects in the future...
I had a cheap adjustable and it moves to much and cant get the bottom 3rd ring to get past it as its the thinner ring an shifts just enough to cause an issue
Plymouth 65
I'll be in the shop
A 340 0.030 over measures 4.07 65'
Demonic
Well-Known Member
It is a challenge to get new pistons and rings in a fresh bore. Two sets of hands helps, and plenty of oil. Adjustable ring compressors take some getting used to. Your piston-to-wall clearance should be checked too. No offense, but if you know you bored it .030" over, you should know your bore size.
mechanicmark
Well-Known Member
You need a 4.070" tapered ring compressor. (4.040+.030 overbore)
This guy has one 4.070" for sale....
[FOR SALE] - Tapered piston ring compressors, various bore sizes
dano
Evil Handy Man
Don't forget rod booties. I hate being the guy to keep the rod bolts for hitting the crank and keeping it aligned. My dad send pistons in like he is hitting a grand slam.
Its always good advice , I always take care in the process , my cheap ring compressor is my biggest issue , thanks for the reply
Just FYI - LA standard bore sizes are:
273 - 3.625
318 - 3.91
360 - 4.00
340 - 4.04
Stroke on all but 360 is 3.31
360 stroke is 3.58
273 - 3.625
318 - 3.91
360 - 4.00
340 - 4.04
Stroke on all but 360 is 3.31
360 stroke is 3.58
"cheap" is your problem.
-
