Thread size AU 5.0 bellhousing to alloy engine bracket

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TUF250

Post subject: Thread size AU 5.0 bellhousing to alloy engine bracket

Posted: Sat May 16, 2015 10:54 pm

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Hi everyone,

I need some help. I was under my Au xr8 the other day and noticed that there is a bolt missing!

It must not have been put back when the clutch was done.

It is the bolt on the drivers side at the bottom onof the bell housing. It connects the bell housing to a long aalloy bracket that mounts up on the side of the engine block. The bolt would be approxim 80mm long.

I tried a 10mm but it wants to cross thread. Can anyone confirm??

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TimmyA

Post subject: Re: Thread size AU 5.0 bellhousing to alloy engine bracket

Posted: Sun May 17, 2015 10:53 am

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If 10mm is close then you don't have a lot of options...

10mm a*** (1.5 pitch)
10mm fine (1.25 pitch)
3/8UNC
3/8UNF

Not sure if the Windsors were an imperial based engine or not... If not then disregard the 3/8 sizes and try the other 10mm pitch...

If there on the other side of the motor you can take to someone to get the pitch read?

Cheers,
Tim

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Nigel

Post subject: Re: Thread size AU 5.0 bellhousing to alloy engine bracket

Posted: Sun May 17, 2015 12:48 pm

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Windsors are Imperial Based - but the transmission is Metric (ha!).

Gearbox to Engine bolts are all imperial. Im not 100% sure but fairly sure that that bottom bolt is 3/8

Nigel

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TUF250

Post subject: Re: Thread size AU 5.0 bellhousing to alloy engine bracket

Posted: Mon May 18, 2015 10:27 am

Getting Side Ways

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Ride: AU XR8 220 Manual

Thanks guys. I will go and buy a 3/8th bolt and give it a go. I will report back so anyone in the future who has this annoying problem will have a record!

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TimmyA

Post subject: Re: Thread size AU 5.0 bellhousing to alloy engine bracket

Posted: Mon May 18, 2015 10:47 am

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Fair chance you'll be looking for a 3/8 UNC then... Can't really imagine them using a UNF...

Cheers,
Tim

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xafalcon

Post subject: Re: Thread size AU 5.0 bellhousing to alloy engine bracket

Posted: Mon May 18, 2015 4:58 pm

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Since it bolts into the aussie made support bracket, my money is on it being a standard pitch metric thread. Most likely M10.

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xafalcon

Post subject: Re: Thread size AU 5.0 bellhousing to alloy engine bracket

Posted: Wed May 20, 2015 4:26 pm

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Confirmed as M10 standard pitch.

A 3/8 UNC is initially a loose fit in the treads but only screws in about 6mm before binding

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TUF250

Post subject: Re: Thread size AU 5.0 bellhousing to alloy engine bracket

Posted: Thu May 21, 2015 11:03 am

Getting Side Ways

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strange. Mine was definately 3/8. M10 would not thread. Maybe it has been re -tapped. It has had a clutch change at some stage.

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TROYMAN

Post subject: Re: Thread size AU 5.0 bellhousing to alloy engine bracket

Posted: Fri May 22, 2015 10:56 am

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mine is 3/8..

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Nigel

Post subject: Re: Thread size AU 5.0 bellhousing to alloy engine bracket

Posted: Fri May 22, 2015 11:48 am

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My previous ones hav all been 3/8. Interesting

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xafalcon

Post subject: Re: Thread size AU 5.0 bellhousing to alloy engine bracket

Posted: Sun May 24, 2015 1:57 pm

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I measured about a dozen I had in my scrap bin

91DA all seem to be M10x1.5mm

94DA are not M10x1.5mm

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