pistons

1991 TOYOTA PICKUP
4 CYL • 2WD • MANUAL
Avatar
BERSYL671
  • MEMBER
  • 55 POSTS
My 1001 toyota pickup piston & rings. What is the least dia. i can use and the biggest i can use. What is the standard size for the truck. Is it .020" or the .030".
Jun 4, 2011 at 6:08 PM
Advertisement
Avatar
MHPAUTOS
  • ✓Experienced Mechanic
  • 31,937 POSTS
Standard size is referred as STD and is usually stamped on the piston crown, repair over size is usually in .005" increments, never re bore more than required to obtain a new bore size, the bore will have to be measured with an internal micrometer to attain the correct repair size needed.
Jun 4, 2011 at 7:35 PM
Avatar
KHLOW2008
  • ✓Experienced Mechanic
  • 41,814 POSTS
The shop doing the job should be able to advise you on the corect oversize to use if reboring is required.

The limit for oversized pistons for most vehicles would be 0.040".

0.020 is the 2nd oversize available.
Jun 5, 2011 at 6:02 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.