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Chassis Strengthening plate
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Chassis Strengthening plate 7 years 6 months ago #173328

Hi, a number of bolts in the chassis strengthening plate under the centre of the car [removed by PO to replace the pipes] are either seized or the captive nut has let go. Please can anyone advise on repair procedure?
Many thanks
Richard

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Chassis Strengthening plate 7 years 6 months ago #173352

The captive bolts are not going to be easy, I guess the answer would be riv-nuts.

For the seized bolts use some plus-gas penetrating oil.

Home to black Alfa Romeo 159 3.2 V6 Q4 ,green MGF VVC and red MG Maestro T16.

MG - the friendly marque.
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Chassis Strengthening plate 7 years 6 months ago #173359

An oxyacetylene torch on the bolts works wonders too... :dry:
David
:shrug:
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Chassis Strengthening plate 7 years 6 months ago #173384

When you put it all back together put some copper grease on all bolts etc it can help any future removal of them.


:beer: :beer: Steve
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Chassis Strengthening plate 7 years 6 months ago #173408

i did the same as stevew suggested.....put plenty of copper grease on the bolts.......stainless steel bolts are available ..... :wave:
MGF / MG TF STAINLESS STEEL BOLT PACK 4 - UNDER CAR FLOOR PAN BOLTS - MG SPARES
Completed
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Last edit: Post by mgtfbluestreak.

Chassis Strengthening plate 7 years 6 months ago #173428

I had about a dozen bolts shear off when I was sorting the TF out, four of them on that reinforcing tray.

I simply drilled them out and ran a tap down them. I think they are 6mmx1 if I remember.

Fortunately the threaded bosses welded on the other side of the floor are quite big and if all else fails you can drill them out to the next metric size up which is what I had to do for a few of the bolts.

I would run a tape through every thread you come across then use stainless flanged bolts with a white waterproof grease.

I don't think you can use Riv-Nuts because they are intended for sheet steel and the welded boss can't be removed without a lot of hassle and also they are not really intended for high loading use.

GWR fasteners do a complete range.

http://www.gwr-fasteners.co.uk/metric-hexagon-flange-bolts---a2-stainless-537-c.asp

Geoff.
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