Loggato
Well-Known Member
Engine has been sitting for MANY years. I imagine there is some steel under the rust, but should I save myself the embarrassment at the machine shop by even asking if they want to regrind those valve seats??
If I'm seeing it correctly, it looks like one of those valves broke off and rusted into the valve guide. Not sure how you can fix that, the guide would be destroyed when you try and get the rusted valve stem out???I will be doing whatever is the most cost effective. And my plan A is to save these heads if possible. Currently the couple of valve seats that are serious rust are my biggest threat. I'm thinking I'll dissemble them, soak them in muriatic acid and then see just what I'm up against.
Previously on a 390 Ford, I was able break everything free and clean the seats up by just lapping them which it looks like I can do with most of these. They turned out pretty good.
If I'm seeing it correctly, it looks like one of those valves broke off and rusted into the valve guide. Not sure how you can fix that, the guide would be destroyed when you try and get the rusted valve stem out???
If I'm seeing it correctly, it looks like one of those valves broke off and rusted into the valve guide. Not sure how you can fix that, the guide would be destroyed when you try and get the rusted valve stem out???
Will be fun to see what those rusted heads look like after a 48 hour vinegar dunk. Will then probably have to wire brush them down, tap on a few things and see what loosens up. Sand the burrs off the valve tips so he can get them out. If things are stuck yet, back in the vinegar tank again for another 12 hours. Maybe even a 12 hour dunk after that, in diesel fuel too if things are really stuck, that will cut the carbon.
Usually the exhaust guides are the one that are wore enough to need attention. If he is lucky he could knurl them and go again.
Let's wish him luck and see what he can do with these heads.
A new set of valves solve a lot of problems and help tighten up the guides, if he can get past the rust pitting in the seats.
Good Luck Loggato !
After this experience is the day I started doing all my own valve jobs in house.
View attachment 1715576970
Do you have the ability to install valve seats and if so what tooling are you using to do that?