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  • Engine Mounts driving me bonkers.

    Ok team, this is totally doing my head in. I really need some help. So far my 2008 1KD Prado has been to four mechanics and I am starting to get seriously frustrated.

    Originally the vehicle was shuddering in 'Drive'. First mechanic serviced, upgraded and fully checked transmission. Then he replaced the left engine mount. Shuddering changed, but did not go away.

    Second mechanic discovered first mechanic had broken the vacuum solenoid controlling the diaphragms in the engine mounts. Replaced. Shuddering still happening.

    Third mechanic performed full diagnosis on vehicle including injectors (perfect) and decided that right hand mount was stuffed. Replaced. The shuddering in "D" is now completely gone, but now when I put the vehicle in reverse, the thing feels like an out-of-control helicopter - big shuddering - most times. Then other times I start it up and can't get the shudder to happen...... WTF!!!

    I cannot work this out. The shuddering in reverse was not there prior to the right mount being replaced. It happens at around 700rpm and then vanishes as the revs go up. If the vehicle started shuddering when I first start it up and put in reverse, it will do it it on subsequent visits to reverse gear - but if it does not shudder when it goes first into reverse from starting, it will not do it during that driving session. All that said, if there is no shudder, and I put the air con on, it will start to shudder, then it will stay shuddering even if the A/C goes off.

    All I can think is the vacuum controller is somehow not doing its job properly (there is def suction getting to the solenoid) or that the mechanics have maybe done something wrong during install. Maybe the new left-hand mount was faulty from the get-go?

    The intermittent nature is making diagnosing hellish for the techs. I have had the vehicle in with reputable, 4x4 / toyota experienced etc shop for three weeks now and we cant find the issue. There was a thread somewhere on here about the correct procedure for swapping out mounts, but I can't find it. Any links or advice greatly appreciated. Thanks a million.
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