Honda-SOHC

SOHC.co.uk Forums => CB500/550 => Topic started by: Siloxious on March 22, 2024, 11:21:42 AM

Title: Broken valve tappet covers
Post by: Siloxious on March 22, 2024, 11:21:42 AM

Hey everyone,

I have a crack in one of my valve tappet covers. Coincidentally, this cover is placed on a cylinder that is misfiring (but this could also be due to a clogged idle circuit in the carbs - I'm adressing that now).

I was wondering if this broken valve tappet cover has any influence on the performance of the engine. Of course I understand that oil could leak out of the engine because of this crack, but are there any other influences? I don't know if the camshaft and valve area of the engine should be at a certain pressure and this crack prevents that, but that would have an influence on all cylinders...

Does anyone have an opinion about this?


Kind regards

Title: Re: Broken valve tappet covers
Post by: Bryanj on March 22, 2024, 12:04:10 PM

No chance of any connection with missfire

Title: Re: Broken valve tappet covers
Post by: davidcumbria on March 22, 2024, 12:12:49 PM

I’ve got a spare valve cover ( the better type with pegged rocker shafts ) if you are interested.

Title: Re: Broken valve tappet covers
Post by: McCabe-Thiele (Ted) on March 22, 2024, 03:09:02 PM

Just a thought

Are you sure it's a crack that is visible on both sides of the casing & not an internal casting mark?

Title: Re: Broken valve tappet covers
Post by: taysidedragon on March 22, 2024, 03:26:04 PM

If there is a crack I would be worried about water getting in. Rain or when washing the bike. Not good inside your engine. 😖

Title: Re: Broken valve tappet covers
Post by: mickwinf on March 22, 2024, 04:09:23 PM

I think he is talking about the tappet adjustment cap? dont think it would affect the running.