07 Lexus 460 serpentine jumped off of pulley when I accelerated (a lot)
#1
Driver School Candidate
Thread Starter
07 Lexus 460 serpentine jumped off of pulley when I accelerated (a lot)
Good afternoon,
I'm enjoying my first lexus! Also my dream car, silver lexus 460.
I put it to the test stepping on the gas, and the serpentine belt slipped out of the wheel. (no alternator, no AC, no water pump working).
I'm putting a new serpentine now. But just curious why? The car has 143,000 miles. My guess is that it was never replaced. Maybe it stretched some? Maybe the tensioner is not tensioning enough?
Thanks!
I'm enjoying my first lexus! Also my dream car, silver lexus 460.
I put it to the test stepping on the gas, and the serpentine belt slipped out of the wheel. (no alternator, no AC, no water pump working).
I'm putting a new serpentine now. But just curious why? The car has 143,000 miles. My guess is that it was never replaced. Maybe it stretched some? Maybe the tensioner is not tensioning enough?
Thanks!
Last edited by PabloBontt; 02-27-17 at 12:24 PM.
#2
Pole Position
If it does it again, you have either a bad tensioner, or another component in the serpentine drive line is loose/wobbly and working the belt off.
Inspect all pulleys, make sure they spin freely and true. If they all check out, and the belt is new, suspect the tensioner.
Inspect all pulleys, make sure they spin freely and true. If they all check out, and the belt is new, suspect the tensioner.
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PabloBontt (02-27-17)
#3
Driver School Candidate
Thread Starter
Thanks for yout tips!
The alternator is making quite a lot of noise also, I'm wondering if somehow the wheel from the alternator was going a bit heavier than what it should and when I stepped on the gas it contributed to the jump. (The noise from the alternator honestly is quite annoying, I'm thinking about going ahead and replacing it also.
The alternator is making quite a lot of noise also, I'm wondering if somehow the wheel from the alternator was going a bit heavier than what it should and when I stepped on the gas it contributed to the jump. (The noise from the alternator honestly is quite annoying, I'm thinking about going ahead and replacing it also.
#4
Pole Position
Thanks for yout tips!
The alternator is making quite a lot of noise also, I'm wondering if somehow the wheel from the alternator was going a bit heavier than what it should and when I stepped on the gas it contributed to the jump. (The noise from the alternator honestly is quite annoying, I'm thinking about going ahead and replacing it also.
The alternator is making quite a lot of noise also, I'm wondering if somehow the wheel from the alternator was going a bit heavier than what it should and when I stepped on the gas it contributed to the jump. (The noise from the alternator honestly is quite annoying, I'm thinking about going ahead and replacing it also.
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PabloBontt (02-27-17)
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#9
Pole Position
A very chewed up tensioner pulley due to bearing failure. Available separate from the tensioner (provided the tensioner is still good) so it's a cheap fix if you go aftermarket. $10.
If you want OEM, complete tensioner only, about $200.
If you want OEM, complete tensioner only, about $200.
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CRowe14 (02-28-17)
#10
Lexus Test Driver
Thanks so much for that information, greatly appreciate it!
#12
Considering that little bearing lasted 143,000 miles, it did its job. I did a rough calculation and found that it has turned at least 300 million revolutions, all with the same grease from 2007.
#13
Pole Position
Yea, not too shabby. These guys usually warn you so failures like this are pretty rare. They get changed out before they get to this point. OP just bought the car so looks like the PO just ignored it knowing he was going to sell.
#14
Lexus Test Driver
Things like this are too bad...but glad the new owner is taking the reigns on fixing the small things to get the car running right again. Take care of a car, it'll take care of you.
#15
Pole Position
I was at a seminar last summer and Gates belt representatives were there and they stressed that belts should be changed every 50,000 miles with the tensioner, which can I found to be ridiculous (and an obvious bias/conflict of interest). But hey, it couldn't hurt. They claim that mysterious check engine lights and loss of power occurs from worn out tensioners and belts...that you can't really visually inspect a belt anymore because they are made from material that doesn't crack like the older belts, instead the rubber just wears away. And the logic behind the tensioner replacement was, because they lose tension they cause the alternator to underpower your electrical accessories...effecting fuel pressure and spark...causing phantom driveability issues. Don't know if I believe that, but that's what I was told.