Yoda's Turbo Log

[cali yaris]

The Cp pistons I bought are for a stock bore 1nzfe but I think they are to small.

If they were too small, and the right measurements were made, wouldn't you know that before you put them in? What tolerances did you use when you put the motor together?

Mine was done by a professional engine builder, as you suggested. So I'm curious to learn more about how you did it.

[pimp my yaris]

Originally Posted by cali yaris

If they were too small, and the right measurements were made, wouldn't you know that before you put them in? What tolerances did you use when you put the motor together?

Mine was done by a professional engine builder, as you suggested. So I'm curious to learn more about how you did it.

I did not have a proper bore guage. That is why I am stressing that it needs to be checked and double checked. I thought ordering a oem bore piston and using a stock unbored block would be OK. But it is very noisy and I am concerned about piston wall scoring or a piston skirt breaking. This is a perfect example of what my car sounds like when starting cold. My piston rings gap was checked and I am not burning any oil and the car runs great. Just very noisy. I have searched the net and it seems to be a common complaint with cp pistons.

http://www.youtube.com/watch?v=7NVjR...e_gdata_player

[Blown_xa]

Originally Posted by pimp my yaris

I did not have a proper bore guage. That is why I am stressing that it needs to be checked and double checked. I thought ordering a oem bore piston and using a stock unbored block would be OK. But it is very noisy and I am concerned about piston wall scoring or a piston skirt breaking. This is a perfect example of what my car sounds like when starting cold. My piston rings gap was checked and I am not burning any oil and the car runs great. Just very noisy. I have searched the net and it seems to be a common complaint with cp pistons.

http://www.youtube.com/watch?v=7NVjR...e_gdata_player

Ive built probably 20 motors, unless you resleeve you pretty much need .5mm larger pistons. My motor has stock bore pistons, but I used a block with 5000 miles on it. Even then, the piston wall clearance is on the loose end of being acceptable after proper honing.

I know many people on here like to save a buck, but sometimes it is better to get a pre assembled shortblock. Many don't realize the work put into a shortblock, it isn't just pistons and rods thrown into a block. (not aiming this toward you)