'92 SHO DOHCams: non-interference?

[DennisT]

Boy has a 1992 SHO, with Yamaha Dual OHC 3.0. I have been reading these forums to see if a timing belt failure would damage valves, etc. I think I am seeing these engines are non-interference and such an event would NOT harm the engine. Am I right?

Thanks,
Dennis

 

[NotSoSlowSHO]

You are correct.

The SHO motor is a non-interference motor.

 

[93rev2sev]

The Gen 1 and Gen 2 V6 SHO motors are non-interference.

the Gen3 ************* is an interference engine(with a VERY weak timing set design)

 

[hawkeye18]

The only thing the timing belt breaking will cause is you to a) be stuck on the side of the road, and b) swear a lot. There will be no engine damage.

 

[zblackbeast]

so the 93 3.0 is interference????

 

[frosho]

No, all the 3.0's and 3.2's are non-interference.

 

[shoon]

so the 93 3.0 is interference????

No.
they used 2 different engines in all SHO's from 89-95.
3.0 & 3.2 engines = non-interference

 

[zblackbeast]

Oh just reread his post and saw gen 3. haha i thought he said 93!! haha. my bad. yea, thats why i was confused, i didnt think they would change the design and retain the same power...

 

[AREA 91]

Now when you add bigger cams without changing pistons, you have an interfearence engine.

 

[hawkeye18]

I thought the +20s kept the engine NI? Wasn't it +40 and higher that made it interfere?

 

[ManySHOs]

+20's are interference.

Ian