slightly deformed spline - subframe bolt hole

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bmw9818
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Post Wed Aug 26, 2015 6:55 am

Firstly wasn't me, had a mate round trying to chisel remains of.the subframe bush stuck inside, slipped and slightly deformed the top of the splines only a bit on one side,

Should I file the lip off then whack the bolt in, do you tighten it up or tap it in from the top, and it will just seat in..
Acaciastrain360
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Post Wed Aug 26, 2015 7:10 am

Use a tapping set to re cut the thread
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Motorhole
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Post Wed Aug 26, 2015 8:16 am

Just pick up a new subframe bolt? Bent one of mine when dropping the rear subframe and a kind man gave me one for free off a breaker - but surely not silly money at BMW?
bmw9818
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Post Wed Aug 26, 2015 8:44 am

Not the bolt, the seat bit In the chassis,

Didn't know could get a spline tap set?
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Brianmoooore
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Post Wed Aug 26, 2015 9:56 am

Don't worry about it. There's no metal that's been removed, only moved, so when the bolt (much harder than the chassis metal) goes back in, it will reform the spline.
Compare the two sides once the subframe is refitted, to check that there is the same amount of thread protruding through the nut, and check the torque again after a couple of wees of use.k
bmw9818
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Post Wed Aug 26, 2015 10:47 am

Ah cool, so just line.it up and hammer it down,