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Timing gears jumping

Getting the best performance from your Isuzu, the in's and out's

Timing gears jumping

Postby Morties2019 » Sun Nov 24, 2019 4:46 pm

Hi all
I am driving an Isuzu pick-up with 4jb1 motor. On two occurrences it just shut down and with further inv9I have found that the timing gears have jumped. Not every time on the same gear. The gears teeth looks visibly to be ok . The motor have seen 370 000 km.
Please advise on what could be the problem.

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Re: Timing gears jumping

Postby geeves » Mon Nov 25, 2019 12:12 pm

Is this the gear or belt drive version? Belt will have a plastic timing cover.
If belt options are loose worn or wrong belt
if gear worn gears or the pulley slipping
Sanding your knuckles before starting work can help. That way you cant skin them
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