No... they all need to be changed, the're simmilar to 22R/E motors and usualy around 150k they need to be looked at and probably changed. You may want to look into some new chain guides too at the time of changing. Cause alot of T-Chain failoures are guide failures and the pieces of the worn guide (causing excessive chain slap/flail wich wears a hole in the T-chain cover) end up taking out the chain as well. The chain also stretches over time. Older 22R's have the best of all because they have the double row chains that are virtualy bombproof..
Originally Posted by Bergger
Luckily for us, I don't belive that Toyota's motors are "interference motors" meaning should the T-chain go the valves don't get smashed into the pistons. I was told this by Ted of Engnbldr fame and his brother who put my 22RE in my toyota. Sure enough, I had a freak break after only 300 miles and the motor was fine, just needed a new chain (free of course)
PM DaveinDenver here on the boards, he knows so much about Toyotas it's really crazy. You could also try talking to Rodger Brown of 4Crawler fame, he's a Toyota guru of sorts as well.
*EMS/Fire/Rescue/Winderness EMS guy... it comes in handy from time to time.*
- 95 Toyota 4Runner SR5 Limited: Project "4Rescue2" underway
*1KZ-TE Diesel, SAS, OME Rear Leaf suspension conversion, Custom Armor... I'm going grey faster then this truck is getting finished.
- 89 Toyota 4Runner dubbed "Project 4Rescue": Rafting/Exploration rig, Rescue rig, daily driver, Home away from home...
*22RE 5spd. OME suspension, 33x10.50 BFG At's, Marlin Armor, 389K miles