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Old Jun 16th, 2014, 07:26 PM
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knocking from front after gear and coolant change?

I jacked up the car (r52 JCW) level to change the gear oil (bought from BMW dealer) and then drained and refilled as much of the coolant as I could (couldn't find the drain plug for the block) Went for a spin - all good. Then picked up missus from station and when we got home (ie slowed down for speed bumps) I could hear a knocking from what seemed like the front of the car, when slowing and dipping the clutch/braking. It seems to go away under acceleration.

What could it be - would it be related to have all four wheels off the ground - ie suspension issue? Engine mounts? (although they should not have been affected by the lifting) More scary gearbox issues?

All feedback greatly appreciated!
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Old Jun 17th, 2014, 07:47 AM
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Anything to do with where you positioned the jack when jacking the car up? Have you bent something?
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Old Jun 17th, 2014, 08:09 AM
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Quote: Originally Posted by The Nun (original)
Anything to do with where you positioned the jack when jacking the car up? Have you bent something?

I hope not - I jacked with the supplied jack in the jack points then used axle stands on the chassis rails at the front then the jack and a two ton jack on the jacking points at the back.
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Old Jun 17th, 2014, 10:30 AM
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Doh! Went to check the suspension and discovered Only three wheelnuts and only one tight! The PO hadn't tightened them up and jacking up and down a couple of times has loosened them further. Phew, could have been nasty.....
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