Stripped Thread

[ElectroFunkDaddy]

Took the NC29 out for a spin in my street a couple times at the weekend, and noticed oil leaking from the bottom of the crank case cover,

Noticed the bolt was not tightend, or so I thought ! , I pull out the hex nnut by hand and noticed that the bolt hole threads were rapped round the bolt like a steel wire, looks like it had been over torqued and stripped the thread.

any who, since its in quite a critical area, and oil prices what they are haha.

i dont fancy topping it up every week, , how do you repair a stripped bolt hole, I thinks it a M3 nut about

LI--------------------- this long haha.

Cheers,


Also it i just take the crank case cover off, will it just spew out oil, do i need to drain the oil 1st?


Thanks

Simon

[Gazza]

Took the NC29 out for a spin in my street a couple times at the weekend, and noticed oil leaking from the bottom of the crank case cover,

Noticed the bolt was not tightend, or so I thought ! , I pull out the hex nnut by hand and noticed that the bolt hole threads were rapped round the bolt like a steel wire, looks like it had been over torqued and stripped the thread.

any who, since its in quite a critical area, and oil prices what they are haha.

i dont fancy topping it up every week, , how do you repair a stripped bolt hole, I thinks it a M3 nut about

LI--------------------- this long haha.

Cheers,


Also it i just take the crank case cover off, will it just spew out oil, do i need to drain the oil 1st?


Thanks

Simon

If there's enough beef in the casing around the stripped thread your best bet is a heli-coil kit. Essentially you drill it out and tap it slightly larger. A heli-coil then screws into the new hole, leaving the original thread inside the coil.

Best to have somebody do it for you if you're not a dab hand with a drill and tap.

Good luck

[ElectroFunkDaddy]

hmm how much do you think it would to get it done?

suppose i can get it done when i take it for MOT

[Gazza]

hmm how much do you think it would to get it done?

suppose i can get it done when i take it for MOT

Shouldn't cost too much. It only takes a few minutes with the correct tools. Try asking around for a quote.

[Coddy]

Again, depending on what material there is spare, you could increase the size of the hole from the M3 size, upto M5 and re-tap the hole.

You would also need to increase the size of the hole through the crank case cover so the new bolt passes through it.