LX 470 Timing belt service info (archives read) (1 Viewer)

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Q

Quick

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Hello guys,

Thinking about replacing the timing belt and besides changing the water pump what else needs changing?

Is it necessary to replace the PS pump?

What about the Cam seals?

The pulley's?

Can some one please post a list what needs to be done and why?

Thanks
 
This tells you most everything you need to know and has a link to Scott's great 'timing belt for dummies' write up.

https://forum.ih8mud.com/100-series-cruisers/452563-time-replace-t-belt-q-about-idler-pullies.html

Cam seals are optional, but I did do mine as a PM.

PS pump is irrelevant to the job, however you will want to remove the pulley.

About the only other advise I'd give would be to pull the radiator so you don't have to fight the shroud like Scott did. Good time to drain/refill coolant. Drain cocks are on both sides of the block.
 
OregonLC said:
This tells you most everything you need to know and has a link to Scott's great 'timing belt for dummies' write up.

Good time to drain/refill coolant. Drain cocks are on both sides of the block.
Click to expand...
...as well as one mounted to bottom of radiator on passenger's side. ;)

Steve
 
I have a 2003 LX 470 with 61k miles. I am going back and forth is it time to change the timing belt and water pump due to the age of the truck (10yrs).
 
2003lx470 said:
I have a 2003 LX 470 with 61k miles. I am going back and forth is it time to change the timing belt and water pump due to the age of the truck (10yrs).
Click to expand...

You're fine. Wait til 90k. Search for 'belt 10 years' and you'll have plenty to read. Zero known timing belt failures, even up to over 200k miles.
 
2003lx470 said:
I have a 2003 LX 470 with 61k miles. I am going back and forth is it time to change the timing belt and water pump due to the age of the truck (10yrs).
Click to expand...

I did my 99 LC at 58k it was almost 9 years old. It spent its life in SW so it was hot and dry. The belt was dried out and cracked and the water pump was starting to leak. The mechanic and I agreed it was a good thing I decided to change it since it would not of made it to 90k miles. I would recommend you change it, cheap insurance,
 
Can some one please post a list of part numbers, prices and an average cost of labor to get it all done?

Parts/labor

Timing belt
Water pump
Thermostat
Idler pulleys
Idler tension-er
Serpentine belts
Serpentine pulleys(?)
crankshaft pulley
fan clutch pulley
Fan bracket

Also: Labor

Crank shaft seal
Cam seals
Valve cover gaskit
PCV valve

Lexus said pulleys don't have to be replaced just like what they told me about the AHC fluid :flipoff2:

Thanks and help greatly appreciated
 
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I would definitely use OEM parts. I learned the hard way. I had the timing belt on my LX470 changed at 90,000. I assumed (wrongly) at the time that the mechanic was using all OEM parts. Fast forward seven years and 85,000 miles - the timing belt broke. The truck basically shut down. After I pulled to the side of the road, I tried to start it up. Nothing happened. Just a bunch of lights on the dashboard. I had it towed to my new trusted mechanic. He immediately diagnosed the problem as the timing belt and went so far as to say that there was no way that there was an OEM one in there if it had failed at 85,000 miles. Well, he was right - the previous mechanic had used a Goodyear timing belt. My fault for not confirming 100% that OEM was being used. Luckily, there was no damage to the engine. I just ended up having my 180,000 mile service done 5,000 miles early. Truck is running better than ever, except the manifold tick.
 
Wow, how on earth did you escape catastrophic failure on a motor that is an interference motor? From everything I have read I was under the impression that when the belt breaks the motor is done.
 
Quick, don't know what year your LX is, but if its the 200k service, might as well consider the alternator and serp belt tensioner. My tensioner started making a racket just a couple of months after my 200k overhaul, and it was an unnecessary extra hour of fiddling to switch out a $66 part and would have been a 3 minute job had I done it with the other service.
 
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That's incredible! One lucky dude!

My timing belt had 130K on it, there isn't a day that I don't hit the rev limiter. I had very little coolant in the engine, and was always running 220*F-270*F. I was under the assumption my engine was in great shape, the dealership that *used* to maintain it apparently did not...Sandy Springs Toyota...you listening? Anyways, the timing belt looked just as good as the new one! Needless to say, I was expecting the belt to look like hell...I was kind of pissed we did all that work to find out it was fine!

I replaced my water pump, some of the blades had broken off. It was time. As for the cam seal, mine wasn't seeping, so we left it. I replaced all the tensioners, the old ones felt fine and didn't have any junk in them, but the timing belt tensioner isn't something you want to skip when your 7 hours deep in your engine. Replace the tensioner and that little hydraulic piston while your in there.

Again, I owe Onur (beno) a huge thanks for performing the 180K. I now see why it costs so much!
 
Lx470iH8Mud said:
Wow, how on earth did you escape catastrophic failure on a motor that is an interference motor? From everything I have read I was under the impression that when the belt breaks the motor is done.
Click to expand...

No idea. Was cruising on the freeway and the engine lost all power. Stopped on the side of the road and tried to start it back up again. Nothing happened - only a bunch of warning lights on my dashboard went on.
 
2000UZJ said:
That's incredible! One lucky dude!
Click to expand...

It's not lucky, it's impossible. It's DOHC, but with a single gear driving both. So when the belt breaks at least some of the valves will be open. When the piston comes up, there would be contact. And with it in 'D' the engine would keep spinning for a while.
 
OregonLC said:
It's not lucky, it's impossible. It's DOHC, but with a single gear driving both. So when the belt breaks at least some of the valves will be open. When the piston comes up, there would be contact. And with it in 'D' the engine would keep spinning for a while.
Click to expand...

So how did this dudes engine not go up in smoke? It's possible (.000000001%). I would say that is pure luck that the engine is still in one piece.
 
Sometimes hearing 'timing belt broke' and what really happened are two different things. Bad sensor, skipped tooth, bad tensioner... hard to say. It's either interference or it's not. And with 4 cylinders on a bank two of them had to have either inlet or exhaust open.
 
OregonLC said:
Sometimes hearing 'timing belt broke' and what really happened are two different things. Bad sensor, skipped tooth, bad tensioner... hard to say. It's either interference or it's not. And with 4 cylinders on a bank two of them had to have either inlet or exhaust open.
Click to expand...

So the belt "broke"? From what I can tell, the belt broke, but engine still runs. Seems like something doesn't quite line up. A common mistake when doing the timing belt is not routing the cam sensor harness properly. That could probably give similar symptoms to a broken belt. I bet the serpentine cut through it like it has on mine. I need to replace that harness soon.
 
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