|
|
|
|
Joined: Sep 2003
Posts: 28
Grease Monkey
|
OP
Grease Monkey
Joined: Sep 2003
Posts: 28 |
Anyone know how much a 1928 Chevy 4 cylinder can be bored out. I parted out the top end of one of my spare engines and am saving the block (nice unused rebuilt bottom-end). I noticed that the pistons are brand new and are marked .040, how much can these be bored out before they are too thin? I am not planning on boring one out, just curiosity...
|
|
|
|
|
Joined: Dec 2001
Posts: 10,379 Likes: 1
Technical Advisor ChatMaster - 10,000
|
|
Technical Advisor ChatMaster - 10,000
Joined: Dec 2001
Posts: 10,379 Likes: 1 |
The limiting factor is the wall between 1 and 2, and 3 and 4. This would be an area that is difficult to seal. If the engine is currently at .040 it has lots of life left. All things considered I think you can go to .100. With as many blocks that exist I think the practical limit would be .080. 
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
|
|
|
|
|
Joined: Nov 2001
Posts: 19,758 Likes: 63
ChatMaster - 15,000
|
|
ChatMaster - 15,000
Joined: Nov 2001
Posts: 19,758 Likes: 63 |
If there is a need to go larger than 0.080" then the block can be sleeved back to standard and the process started again. Just had three sleeves put into a '31 block. Have run sleeved blocks for many, many years without problems.
How Sweet the roar of a Chevy four!
|
|
|
|
|
Joined: Dec 2001
Posts: 239
Backyard Mechanic
|
|
Backyard Mechanic
Joined: Dec 2001
Posts: 239 |
The 27 block I am running was bored out 0.180" over in order to use Model A pistons and rods and has never given any problems, but I use special studs with nuts so I can torque to much higher values. For the reasons stated by Ray and Chip I agree that about 0.100" is a practical limit and would then sleeve or use another block.
Herb
|
|
|
|
|
|
|
