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Diagnostic & Repair Tech HELP! My car is not running right. All about Natural Aspirated OEM Lexus/Toyota V8 Powertrain. Post your N/A car problems here.


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Old 04-23-2007, 11:54 AM
maxuslexus maxuslexus is offline
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Default Reliabilty of Lexus LS400, 1uz-fe timing belt?

Hello:

I'm a newbie here and this is my first post! I have never owned a Lexus before. However, I'm working an a "potential" deal for an 1996 Lexus LS400 with 47,000 original miles on it! This LS400 is factory original in every way! This car runs and drives great and seems to have alot of power for one of these(unmodified)LS400's! My question involves the expected reliability of the timing belt, before replacement might be needed? Please answer this question, in regards to a stock(unmodified)LS400? At this point, I just want to know just how good and reliable(Or, unreliable?)these timing belts are-since the proceedure appears to be complicated for replacing the timing belt on these LS400's? No, the timing belt on the 1996 LS400 in question, doesn't need to be changed now-but, I'm just wanting to know what the expected lifespan(In normal driving!)would be, on the average, for these LS400's? I mean, on lot's of less expensive cars-these timing belts are just "throw-away" belts and require fairly early replacement! So, are these LS400 timing belts the "throw away" type-or, are these belts of higher quality and would last much longer, for their overall life span, before "requiring replacement? Please explain and clarify your answers? Thank you!
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Old 04-23-2007, 11:59 AM
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Lextreme Lextreme is offline
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47K is very low. I just got a 1995 LS400 with 141K and its very smooth and quiet. As for the life of the timing belt, they are good for 95 to 100k miles. So you are good for the next few years.
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Old 05-15-2007, 07:19 AM
miamistyle miamistyle is offline
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On the TB, Lexus says 90k or 6 years. You don't want it to go on your 96, it's got the interferance engine. If it snaps you'll need a lot more than another belt. At the least I would have it inspected.
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Old 05-15-2007, 10:33 AM
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stevechumo stevechumo is offline
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Quote:
Originally Posted by miamistyle View Post
On the TB, Lexus says 90k or 6 years. You don't want it to go on your 96, it's got the interferance engine. If it snaps you'll need a lot more than another belt. At the least I would have it inspected.
If the timing belt breaks on the LS, it shouldn't snap anything else such as the head valves..etc. Toyota designed this better than a Honda. However, a Toyota/Lexus with a broken belt should need to be stopped immediately to prevent further damage.

David is right. The LS/SC belt is way too good at around 90K miles. It's recommended to be replaced at this point by factory. However, to be sure take out the belt cover, turn the crank slowly and check for any wear or crack.
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Old 05-15-2007, 11:03 AM
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I think 1995 and up are interferance engines. So, if the dealer require change of TB every 6 years, then I think you should.
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* 1998 GS400 - Daily Stock
* 1995 Previa - Supercharged Previa
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Old 05-18-2007, 04:00 PM
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Thermactor Thermactor is offline
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My '96 is on its second timing belt - last time it was done was at 120k, now it's at 243k... I must be on borrowed time? When I took the spark plug valley covers off, the timing belt looked fine to me.
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