Well I did it, I cross threaded a coil bolt when replacing my plugs. It is the back one on the drivers side.
I can't get a tap back there and was wondering if there is such a thing as a extra hardened bolt that I could just crank on and that would make new threads without breaking.
I know the original ones are 8.8.
Is there anything hard enough or even a self tapper.

Thanks

 

Sorry, I meant coil bolt

 

I wonder why they used hardened coil bolts? The things thread into aluminum and it isn't like they have any difficult job. I was thinking maybe because of the spark plugs blowing, but the fuel rail is there to prevent the coil pack from going too far.

 

Grade 8.8 material is not very hard. About equal to U.S. grade 5 material. Try and find a trhead cutting screw or thread forming screw. Look at McMaster Carr.

 

Can anybody tell me the exact size and thread of the coil bolt so I know what to ask for.
Thanks

 

Can anybody help out with the size and thread pattern of the bolt so I know what to ask for.
Thanks again

 

Stormyday,
Coil bolt.

M5 X 0.8 X 27 Bolt
HEX FLNG PILOT (Torque) 4.5 - 7 Nm)




THOR.

 

Thank you very much thor

 

What you need is a self tapping bolt. They are hard enough to cut their own threads in steel.

If you can't find one, send me a PM with your address and I will mail you one.