super99
Well-known Member
The older 550 (1963) had a miss, so I ran a compression test with all spark plugs out. 3 cylinders had 110#s and #4 had 60#s. I got the head off yesterday afternoon and the exhaust valve is burned a little. It's been years since I had a head worked on.
I know that one valve needs replaced, question is, do I have all of the valves ground or just fix the one that needs replaced? Will a machine shop do just one valve or will they want to do all or nothing? The tach reads a little over 5000 hrs. There is a slight ridge in the cylinder walls, I can't catch a fingernail on it, but you can see it. I'm not concerned about that, it will run longer than I will be around. The tractor will have light use, so I just need the valve fixed and call it good. 1/2 of my lifetime ago there was an old guy that had a valve grinding set up in his shop and he would grind and replace valves in the head on my super 88 when it would burn one out running the corn dryer. He is long gone and I don't know of anyone that does it anymore, so it will have to go to a machine shop to be repaired.
I read a lots on here about valve protrusion. I kinda think I have a vague idea what it is but not sure. Is this something I need to be concerned with, or does that only apply to diesel motors? Thanks, Chris
I know that one valve needs replaced, question is, do I have all of the valves ground or just fix the one that needs replaced? Will a machine shop do just one valve or will they want to do all or nothing? The tach reads a little over 5000 hrs. There is a slight ridge in the cylinder walls, I can't catch a fingernail on it, but you can see it. I'm not concerned about that, it will run longer than I will be around. The tractor will have light use, so I just need the valve fixed and call it good. 1/2 of my lifetime ago there was an old guy that had a valve grinding set up in his shop and he would grind and replace valves in the head on my super 88 when it would burn one out running the corn dryer. He is long gone and I don't know of anyone that does it anymore, so it will have to go to a machine shop to be repaired.
I read a lots on here about valve protrusion. I kinda think I have a vague idea what it is but not sure. Is this something I need to be concerned with, or does that only apply to diesel motors? Thanks, Chris