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Is it essential to replace this valve?

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McCabe-Thiele (Ted):
Before I grind in the last valve I am thinking this old damage might cause a problem.

It's not deep but it has gone throught the top surface of the valve in 4 places - I suspect in the past some plug porcelain or similar has done the damage.

Should I fit a new valve I'm hoping they are still available?

I'm unlikely to do more than 500 miles a year in reality over the next 4 or 4 years.

No 4 exhuast valve by Macabe Thiele, on Flickr

taysidedragon:
Personally, I wouldn't use that one again. Source a new or good used valve to replace it.

Athame57:
Steve at 400Four has got a selection of used valves... https://www.400fourbits.co.uk/#engine

McCabe-Thiele (Ted):

--- Quote from: Athame57 on September 06, 2021, 07:38:30 PM ---Steve at 400Four has got a selection of used valves... https://www.400fourbits.co.uk/#engine

--- End quote ---

I've sent an e-mail I wonder why he does not price his parts?

Athame57:

--- Quote from: Macabethiele (Ted) on September 06, 2021, 07:44:43 PM ---
--- Quote from: Athame57 on September 06, 2021, 07:38:30 PM ---Steve at 400Four has got a selection of used valves... https://www.400fourbits.co.uk/#engine

--- End quote ---

I've sent an e-mail I wonder why he does not price his parts?

--- End quote ---
Maybe he is shrewd and checks for availability elsewhere!

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