SOHC.co.uk Forums > CB500/550

Valve seat guide

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bomber:
So, after almost 6 months and two broken exhaust valve seats guides, I'm looking for a new engineering shop who can do it...
Is it really difficult to do? I thought, you need press and bloody push old one out and then squeeze new one in after freezing it.

I didn't get charged for work, and they did honed cylinder block but I rather have job done.

Bloody boooring.

Any one can recommend a place to do this job around London preferably North London?

Thanks

Trigger:
Valve seats? or valve guides?
The valve guides go in by heating the head and freezing the guides, then a air hammer. Valve seats, well that is a secret.

Lobo:
Bomber,

Google 'Stotfold Engineering' (Biggleswade). Terry Ives is the man... a down to earth & very approachable chap. Restored a 400F engine of mine 2 years ago... very happy.

Cheers,
Simon.

andy_c101:
Needs use of the valve guide installation tool(c/o David Silvers) & Heat-n-freeze!
Andy

Trigger:
The problem with valve guide these days is they are crap metal (even the ones that come in Honda Bags). I am finding that the quality is that bad that they distort when putting them in. I prefer to make my own so that i get a good match to the valve, a bit like matching a piston when doing a re-bore.

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