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Jimny timing belt broken

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08 May 2023 11:05 #249004 by Ekul10007
Hi Folks, I have a 2003 Jimny manual and parked it one day, 3 days later tried to start it and the engine would turn but not fire up. It has been determined that the timing belt has slipped or broken as I  tried to start the car.  Is this a normal occurance and will there be any engine damage seeing that the car was stationery all the time?

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  • Lambert
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08 May 2023 14:46 #249005 by Lambert
Replied by Lambert on topic Jimny timing belt broken
Does your engine have a plastic cover on the front between the block and the rotating ancillaries it's just that most hard top Jimny by 2003 were on chains not belts. As to turning over and over and not starting I wouldn't put a snapped belt anywhere near the list of possible causes, is this diagnosis via a professional facility? There's many things that could cause your symptoms from electronic sensor failure to fuel system failure I really wouldn't jump to a failed cambelt.

Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
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08 May 2023 15:56 #249010 by Ekul10007
Replied by Ekul10007 on topic Jimny timing belt broken
Thanks for your thoughts. The opinion is per a professional. mechanic. It was also the last option from my mind. He checked through the oil filler plug and as I cranked the engine he noticed the tappets were not moving. The engine is a m13a. According to the specs this model still has a timing belt. I was thinking of removing the tappet cover to check is the belt/chain is intact.
The fuel pump is working,as I can hear the pressure noise as I swtich on the ignition.
It was just strange to me that the timing belt would break as i started the engine.

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08 May 2023 16:22 #249011 by mlines
Replied by mlines on topic Re:Jimny timing belt broken
M13a has a timing chain, not belt

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Martin

2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses
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08 May 2023 21:28 - 08 May 2023 21:29 #249021 by lightning
Well, if the valves aren't moving when the engine is turned over then something has clearly broken.

So your next step is to remove the timing cover (if there is one) and have a look. Or take off the cylinder head cover and have a look in there.
Last edit: 08 May 2023 21:29 by lightning.

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  • Lambert
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09 May 2023 03:27 #249023 by Lambert
Replied by Lambert on topic Re:Jimny timing belt broken
The chance of snapping the timing chain on its own is very small and the chance of it still being able to turn over without making some very horrible noises is even smaller. By all means take the rocker cover off and confirm but I really expect it to be something else. This professional, are they a specialist you have used for years or just the first one you found in the phone book?

Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
ADOS Attention Deficit Ooooh Shiny!

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09 May 2023 05:11 #249025 by Ekul10007
Thank you. I cannot see the timing cover but I will remove the cylinder head cover and check today.

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09 May 2023 05:18 #249026 by Ekul10007
Yes and what is even stranger to me is that the vehicle was stationery. as I tried starting the engine this problem occurred. NO noises, no metallic grinding..........just the engine turning the fan but no starting. i live in Cyprus and the mechanic , qualified apparently works for his dad in a small family business. I have used them for 18months now.
Thanks for input.

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09 May 2023 07:12 #249029 by mlines
Crank woodruff key sheared, keyway stripped?

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Martin

2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses

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10 May 2023 06:41 #249064 by Ekul10007
Replied by Ekul10007 on topic Jimny timing belt broken
After removing the tappet cover i see that the timing chain has sagged between the 2 camshaft gears. I assume from this that is has snapped somewhere near the crankshaft.. on the positive side, because the engine was not running I doubt (and pray) that no damage has been done to valves or pistons.
Is the replacement of a timing belt a "engine out" job or can one preform this task by removing the radiator?
Thanks for all advice.

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  • Lambert
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10 May 2023 08:01 #249065 by Lambert
Replied by Lambert on topic Jimny timing belt broken
Having never had to change one I don't know, probably easier on the bench and then you can check or replace the clutch at the same time but I don't know how necessary taking the motor out actually is.

Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
ADOS Attention Deficit Ooooh Shiny!

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10 May 2023 09:01 #249066 by Busta
Replied by Busta on topic Jimny timing belt broken
It's very unusual for a timing chain to simply snap! Be interesting to find out what has caused it. Replacement is much the same as replacing a timing belt, you don't need to take the engine out. Access on the Jimny is better than most cars once you have the radiator out.
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