Timing Belt Failure. Anyone ever had one?

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Muddy Bean

Breaking something or fixing something
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Not trying to discuss when to replace it, or the catastrophic battle that would ensue between pistons and valves if it ever snapped. Just want to know if anyone here has ever had their timing belt fail on a 100 series?
 
I've never had a Toyota belt snap, but I change them every 90-130k miles. On my other Tacoma, the belt looked almost new at 130k miles. There was another thread where a guy's mom drove 300k miles on the original belt in a 100. Wouldn't advise that, though.
 
Not my truck, but I have seen the cam gears break off of the front of a 3.4 in a 4runner because of engine sludge. One of the worst cases I have ever seen but the timing belt was still in one piece.
 
I know it can happen, but I'm wondering because I've driven cars into the 280,000 mile range and never changed the timing belt. I have a Camry with a non-interference engine...I wasn't worried about engine damage so I never changed it until around 240,000 miles and only because my water pump went out and they were located under the same cover. Just curious. I haven't done a TB change yet on our 100 series and it has 117,000 miles on it so far.
 
Not trying to discuss when to replace it, or the catastrophic battle that would ensue between pistons and valves if it ever snapped. Just want to know if anyone here has ever had their timing belt fail on a 100 series?
I am a service advisor for Toyota I have said before in threads I have never seen a V8 timing belt break. I sell 3 or 4 a week and always check the condition of the belts I change. Some look new some look worn out and starting to crack. Don't have any clue as to why. As some have stated waterpumps go first, have that checked and do both if it's weeping. I would not worry about going 150k before doing it but as I tell my customers you gotta do it eventually might as well do it now while I have my monthly special. $369.00 plus tax and shop fees
 
That's a great price!!
Is it true when they change the timing belt. They put a sticker on the cover with the mileage it was done at?
I am asking cause I bought a 2002 Lx470 at auction and don't have records. Has 135k on it? This is what the lady told me today at the toyota dealership when i was getting pricing on the timing belt...
 
That's a great price!!
Is it true when they change the timing belt. They put a sticker on the cover with the mileage it was done at?
I am asking cause I bought a 2002 Lx470 at auction and don't have records. Has 135k on it? This is what the lady told me today at the toyota dealership when i was getting pricing on the timing belt...

Any Lexus dealership can pull up the service records for you. Just FYI.
 
Only timing belt I've seen break on a V8 Toyota was on a 92 LS400 @ 235k on an original belt a couple years ago.

I have seen water pump failures, and vehicles that had not been maintained properly seize camshafts, but broken belts are not common.

Sent from my PC36100 2
 
That's a great price!!
Is it true when they change the timing belt. They put a sticker on the cover with the mileage it was done at?
I am asking cause I bought a 2002 Lx470 at auction and don't have records. Has 135k on it? This is what the lady told me today at the toyota dealership when i was getting pricing on the timing belt...

Generally, if done at the dealer, yes. If its not there and service records don't show the replacement - with those miles I'd do the belt and water pump.
 
That's a great price!!
Is it true when they change the timing belt. They put a sticker on the cover with the mileage it was done at?
I am asking cause I bought a 2002 Lx470 at auction and don't have records. Has 135k on it? This is what the lady told me today at the toyota dealership when i was getting pricing on the timing belt...

Hello,
I had the T-Belt done at a Toyota dealership a little over a month ago and they did not place a sticker on the cover. I would imagine some might do so, but I can say that the dealership I went to does not.
Cheers,
Jack
 
Call me crazy, but I'll change the belt when the water pump weeps. And hope I don't weep.
 
Call me crazy, but I'll change the belt when the water pump weeps. And hope I don't weep.

How would you know? Weep hole isn't visible with the covers on.
 
I have a question. If I take the timing cover off. Couldn't I just look at he belt and the brand? What would it say? If it has not been changed and is the original belt? Would it say Toyota on it? I have a 02 Lexus Lx470

If you spun it enough you could eventually see the logo. The condition of the outside of the belt isn't really an indication, it's the inside. And to really tell you need the belt off where you can flex it backward and look for cracks. But by then you would only be $60 away from a new belt.

If the belt looks wet or oily you also have a very strong indication of a problem.

But as others have said, the water pump lasts a long time but will likely go before the belt. It does have a weep hole. The purpose of the hole is to allow a small amount of water that made it past the primary seal and into the bearing area to get out without allowing the bearing to become saturated and fail. The problem is that the coolant can crystallize in the hole and block drainage and you'd never know because its behind the covers.



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Interesting. Every other car I owned leaked enough coolant out of the weep hole that I had coolant loss or could certainly see the steam in the winter. If the LC isn't going to indicate, then I might have to rethink my strategy :-/
 
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