SuperCoupe400

What would be the reprocusions to the engine if the timingbelt were to break at moderate to high speed?

I know (with the old-school push-rod engines) you'd end up with bent rods, trashed valve stems, and quite possibly a wrecked cylinder head.

But is the SC400 engine built the same way as that? Would the same type of damage occur if the timing belt got thrown at highway speeds?

If not, then what type of damage would (might) occur?

Thanks.

sc250tt

No damage will occour. The 1uz fe non vvit is a non interferance engine

SuperCoupe400

NON-INTERFERANCE.... I knew there was a term for it that I had heard before (just couldn't remember what it was). Thanks. This is good to know.

I'm probably a bit (5k-10k) over the recommended timing belt change interval. I recently bought a belt to swap out myself, but just haven't had the time to get in there and do the work. It's good to know that I won't wreck my engine if I can't get to it before it snaps.

Thanks.

5sp_jzz30

iTrader: (2)

its not like the belt has an expiration date in it. it wont snap right after you pass a certain interval at which you have to change it. my buddy had a 2003 is300 with like 130k and no timing belt change yet....i told him its not good but he has no time to do it. his car is about 60k over the recommended change interval and it still runs fine.

if you are over just a bit on the mileage i wouldnt worry about it too much.

SuperCoupe400

Yeah, jzz30, I really am not really too worried. I may just wait until the spring or summer months to do it anyway (its only 11 degrees right now here in Michigan).

I've had belts snap on two other cars of mine, so it's nothing new to me. And they were probably about 40k-60k over.

5sp_jzz30

iTrader: (2)

its 11 degrees here in chicago too. i want to work on my car...i just dont want hypothermia good luck with the timing belt job once you do it.

97-SC300

iTrader: (17)

yeah this cold is getting to me.

Dx3

iTrader: (13)

Please don't let him try and sell it on here if he ever sells it

Jonny

jmwenick

no big deal, my Toyota Celica had 210,000 on it before the timing belt snapped, and that was only because the water pump was leaking onto it. Just put in a new belt and bam, back on the road. You gotta love Toyota/Lexus!

TheMole

iTrader: (13)

It's non-interferEnce for future search purposes.

T0ked

iTrader: (2)

FYI, the later year VVT-i engines are interference designs and so a bit more care should be paid to those. The earlier non VVT-i ones are as described.

JesLet

iTrader: (19)

I thought when a timing belt snaps, the valves will snap as well. Then you have to change the head. Lol I live under the rock.

Newb question: Is 92 1UZ-FE non-VVTI?

forcefed86

Little off topic but along the same lines... ]

Are the 2jzge/2jzgte non interferance engines as well?

sc250tt

Yes the non vvt-i 2jz engines are also non interference engines also