Interference???
#6
So let it be known that this statement: "95 and newer V8's ARE interference motors. 90-94 are not. " from fire is incorrect.
the 1uz and 2jz are both noninterference motors throughout their entire existence
the 1uz and 2jz are both noninterference motors throughout their entire existence
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#8
Ummmm... no proof, but my Lexus tech has told us that nothing will happen if the timing belt snaps on our 99 GS400, 92 SC300 or 93 LS400 (no longer have the LS).
I'm at the dealer quite a bit talking to the techs and what not. Never seen an engine pulled for a bent valve. Oddly enough I always seem to see RX300s with engines pulled for worn cylinder bores...
I personally wouldn't replace a timing belt before 100k miles (unless the water pump fails) on these. They just don't break enough.
I'm at the dealer quite a bit talking to the techs and what not. Never seen an engine pulled for a bent valve. Oddly enough I always seem to see RX300s with engines pulled for worn cylinder bores...
I personally wouldn't replace a timing belt before 100k miles (unless the water pump fails) on these. They just don't break enough.
#9
Guys,
Thanks for the imput. Problem is everyone is going on someone elses imformation. Lexus owners are for the most part NOT high rpm people. They, for the most part, are scheduled maintenance types. This means very few cars will ever get to the point of failure. Just because something doesn't fail doesn't mean it will not. I have seen tires on cars that are thread worn NOT fail and seen nearly new tires fail!!! Sometimes, usually, don't worry about it are like any accident... never happens until it does
I am VERY surprised at ANY high compression engine that will not hit valves during a cam drive failure. This means that any valve can be held completely open and have the piston NOT hit it as it passes TDC. Very unusual. I did have a low compression (8 to 1) turbo motor with dished pistons that was non-interference but that, as I said, is unusual. SO, understandably I am sceptical. I have had MANY experts tell me INCORRECT information.
My 96 LS400 is approaching 90k miles. It is warrantied to 100k. If I do not do the service and something fails it is my cost. I know it is only 10k miles but I do want the belt replaced within no more than 20k (yes I intend to keep the car) so, I will probably have it done and have peace of mind. I would LOVE to see an actual technical page or bulletin from Toyota on this question. Any guesses as to where to look?
Thanks for the imput. Problem is everyone is going on someone elses imformation. Lexus owners are for the most part NOT high rpm people. They, for the most part, are scheduled maintenance types. This means very few cars will ever get to the point of failure. Just because something doesn't fail doesn't mean it will not. I have seen tires on cars that are thread worn NOT fail and seen nearly new tires fail!!! Sometimes, usually, don't worry about it are like any accident... never happens until it does
I am VERY surprised at ANY high compression engine that will not hit valves during a cam drive failure. This means that any valve can be held completely open and have the piston NOT hit it as it passes TDC. Very unusual. I did have a low compression (8 to 1) turbo motor with dished pistons that was non-interference but that, as I said, is unusual. SO, understandably I am sceptical. I have had MANY experts tell me INCORRECT information.
My 96 LS400 is approaching 90k miles. It is warrantied to 100k. If I do not do the service and something fails it is my cost. I know it is only 10k miles but I do want the belt replaced within no more than 20k (yes I intend to keep the car) so, I will probably have it done and have peace of mind. I would LOVE to see an actual technical page or bulletin from Toyota on this question. Any guesses as to where to look?
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