Bugga, timing belt snapped

Submitted: Thursday, Jan 17, 2008 at 13:20
ThreadID: 53579 Views:5073 Replies:11 FollowUps:8
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The timing belt on the 2L diesel snapped yesterday, grr.

Gave no warning, just let go with no noise as I pulled up at some lights so engine was just about idling.

Pushed it off the road and checked, I could see it was not outa diesel, the engine cranked freely so I removed the oil cap on the rocker cover and cranked it knowing in my heart the o/h cam would not be moving, I was correct and I hated myself, my fault, I shoulda done the valve adjustments a few thousand km ago, I would have seen the belt was starting to fray then, grr.
Had it towed home by RAC.


so the big question is:

HOW DO YOU TELL IF the VALVES or PISTONS are DAMAGED ?

-> "WITH-OUT" lifting the head, as it's a real *** of a job and the new belt has to go back over the cam drive gear on the head, I don't want to put it on, adjust the valve and pump timing and then remove it, just to replace some damaged pistons or bent valves etc. that I did not check, for whatever reason.

Have removed the belt and it's a complete mess, cleaned the front valve train/gear cover and no damage there so will go to Perth by bus and come back next week and fix the ol girl.
Mainey...
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Reply By: Leroy - Thursday, Jan 17, 2008 at 13:36

Thursday, Jan 17, 2008 at 13:36
If you are lucky the engine may be designed such that the valves won't kiss the pistons! Call your Toyota dealer to find out.

Leroy
AnswerID: 282076

Reply By: Robnicko - Thursday, Jan 17, 2008 at 13:53

Thursday, Jan 17, 2008 at 13:53
Mainey,
My wifes old car, Mazda 626, had the timing belt snap just like yours (idling engine, went to take off and then nothing)
Put a new belt on and the thing fired up and never had an issue. I think you should be ok as it was idling + being a diesel it would idle alot slower than what the old Mazda did.
Good luck.

Rob
AnswerID: 282077

Reply By: MrBitchi (QLD) - Thursday, Jan 17, 2008 at 15:37

Thursday, Jan 17, 2008 at 15:37
Depends if it's a "free spinner" or an "interference" design. If it's a free spinner then the valves will be fine. As Leroy said, ask Toyota.
AnswerID: 282094

Reply By: Member - Matthew ,United Fuel- Thursday, Jan 17, 2008 at 17:12

Thursday, Jan 17, 2008 at 17:12
Mainey

If its the 2L engine they normally break rocker arms instead of bending valves but have seen them bend valves at high RPM failures.

Best thing to do is put the new belt on and check the tappet clearances straight away before you put all the front back on.

Matt
AnswerID: 282110

Reply By: donks1 - Thursday, Jan 17, 2008 at 18:21

Thursday, Jan 17, 2008 at 18:21
Mainey

it's a 2L

they bend, simple as that.. if yours hasn't, buy a lottery tickett

as said below, they also break cam caps and rocker arms. that will be your first indication

donks
AnswerID: 282116

Follow Up By: donks1 - Thursday, Jan 17, 2008 at 18:21

Thursday, Jan 17, 2008 at 18:21
that should have been above


donks
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FollowupID: 546616

Reply By: stefan P (Penrith NSW) - Thursday, Jan 17, 2008 at 18:45

Thursday, Jan 17, 2008 at 18:45
I snapped a timing belt in my old Cressida, $4500 for a rebuild or $1000 for a low KM jap import......try and guess which way I went???

Cheers Stefan
AnswerID: 282120

Follow Up By: porl - Thursday, Jan 17, 2008 at 21:31

Thursday, Jan 17, 2008 at 21:31
crikey, my wife was driving our old import Holden gemini (circ 1995), in 2003, it got towed to the nearest RACQ repair depot at Coomera, me thinking crikey how far to the nearest car yard, the bill for replacing the broken belt was $75.80, I fell off the chair ...
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FollowupID: 546649

Follow Up By: stefan P (Penrith NSW) - Friday, Jan 18, 2008 at 14:48

Friday, Jan 18, 2008 at 14:48
the new belt was $120........the new valves ect mega $$$$$.

As said before some engines are free spinning and its no issue.
Some smash the engine to pieces
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FollowupID: 546770

Reply By: nowimnumberone - Thursday, Jan 17, 2008 at 19:44

Thursday, Jan 17, 2008 at 19:44
before you do anything check your valve clearances.
if the valves are bent they wont seat right so you will have big clearances.
cheers
AnswerID: 282129

Reply By: Old Dave - Thursday, Jan 17, 2008 at 20:17

Thursday, Jan 17, 2008 at 20:17
Mainey

The 2L is an interference engine,

do not turn engine or cam with the belt of unless you know that

pistons are all half way up / down,

i have manual for 2L if you wish yo borrow

dave
AnswerID: 282134

Follow Up By: Mainey (wa) - Saturday, Jan 19, 2008 at 10:28

Saturday, Jan 19, 2008 at 10:28
dave,
Thanks for the offer, however I have the engine workshop manual, used it to set-up the pump and valve timing for the previous belt install I did some 3 or waz it 4 years ago, a few hundred thousand km's over the belt change requirement for sure.

Too many fish, too little time available to do vehicle servicing.
Mainey...
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FollowupID: 546960

Reply By: Davo_60 - Thursday, Jan 17, 2008 at 21:42

Thursday, Jan 17, 2008 at 21:42
Mainey,

As above, if you take the rocker cover off you may find that a rocker arm or two have busted off which may result in other engine damage. I had a timing belt break on the 2.2 (L) engine at about 3000rpm and it broke all but one of the rocker arms. You may be lucky at idle. Good luck,

Dave
AnswerID: 282154

Follow Up By: Mainey (wa) - Saturday, Jan 19, 2008 at 10:31

Saturday, Jan 19, 2008 at 10:31
Dave,
I must be lucky no broken rocker arms, will clean and inspect oil galley tomorrow.
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FollowupID: 546962

Reply By: furph - Friday, Jan 18, 2008 at 08:07

Friday, Jan 18, 2008 at 08:07
Sadly its always easy to be wise in hindsite, but when was the belt last changed.
If recently you may have some recourse through the workshop who did the replacement.
There could well be quite a few $'s in the repair job, maybe, as has been suggested, cheaper to visit the wreckers for another complete motor.
If that were the case, fit a new belt at the time the motor goes in (but I dont need to mention that).
furph
AnswerID: 282214

Follow Up By: Mainey (wa) - Saturday, Jan 19, 2008 at 10:22

Saturday, Jan 19, 2008 at 10:22
furph,
It's my own fault I (personally) changed the belt some time ago, ok more than a few hundred thousand Km ago, and they are supposed to be changed every 100,000 km.
It's a vehicle that's worth nothing as a trade or resale an I've had it since new so it's paid for it's self.
Now if I can't just fit another belt, adjust the pump and valve timing I will probably dump it with a wrecker. It's got an as new gearbox and windscreen lol

Will probably replace it with a small Toyota or Mitsubishi 4x4 ute or similar, as my travelling requirements have now changed due to having a home as a base and the option of having a boat instead of the Camper Trailer.

Means I will have to reconfigure the solar/battery/fridge system grr.
Mainey...
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FollowupID: 546957

Reply By: Mainey (wa) - Saturday, Feb 02, 2008 at 18:53

Saturday, Feb 02, 2008 at 18:53
Well bugga me,
I loosened off the oh cam retainers, replaced the torn-up timing belt and adjusted the timing again, tightened up all the nuts n bolts, filled radiator with water and kicked it into life....

IT W0RKS

went for a drive down the highway for about 10Klm to check for damage or unusual sounds

Now will have to adjust the valves (one day)

Either you just can't kill these Toyota Diesels or I'm just really 'lucky'

Mainey . . .
AnswerID: 285177

Follow Up By: Mike Harding - Saturday, Feb 02, 2008 at 19:04

Saturday, Feb 02, 2008 at 19:04
I suspect you're just lucky.

But I'm more interested in why the belt broke? Lack of maintenance? Act of God? Poor quality belt? If the third who made the belt?

It's funny, but I hardly remember a timing chain breaking - in fact I don't think I recall even one but I, personally, know of quite a few belts which have...?

Mike Harding
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FollowupID: 549995

Follow Up By: Mainey (wa) - Saturday, Feb 02, 2008 at 19:34

Saturday, Feb 02, 2008 at 19:34
It was LACK of maintenance :-(

Motor had done a couple of hundred thousand km on the belt and they are recommended them to be changed at ONE hundred thousand km.
Vehicle has done 600,000 Km and it was only the 3rd belt.

When I get time I must adjust valve clearance, as it's NOT been done since I installed that last broken timing belt.


I imported a Mercedes and the timing CHAIN broke in it early last year, was worth more to fix than it cost me, so gave it away as I was packed ready to leave for a trip north, have to get the priorities right.

Mainey . . .
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FollowupID: 550001

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