SOHC.co.uk Forums > CB500/550

exhaust stud ..... welding the head

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MikeM:
 I have used the m8x1.25x10.8 mm neilsen kit, used the drill and tap in the kit

aluminium seems really soft and wont take the tap for some reason hence the helicoil pulls out

am currently going down the route of replacing head as unable to get someone to weld and retap back to m6

Paull:
Hi MikeM

Aluminum is soft, compared to steel and helicoils are tempered steel to stop them snapping out.

It sounds as if you are running out of options, a good ali welder or a new head, sorry to say.

Paull

 
 

MikeM:
yeah i have a new head coming and a more experienced guy on it to repair mine

will be sorted shortly  :)

Paull:
Cool Let us know how you get on.

Paull

Bitsa (Ralph Wright - RIP):
Mike
I had a mate Ali weld a spare alternator cover which had a hairline crack in it.When I got it back I was so surprised at how hard it was to grind down.So going on that basis your head if done the same way will come out as new and stronger.
Best of luck
Bitsa

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