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New valves or can we fix old?

B

Bhunt

Member
Will I be better off buying all new valves or is it cheaper and can they grind and repair the old ones? I would like to buy the rod bearings instead of spending a lot on valves.! 1952 case SC Thanks in advance Byron
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They can be ground IF there is enough valve margin left. Based on what I think I can see from your photos, this is not the case. You will most likely need mew valves, and the seats ground. Also, the seats may need to be replaced if those pits are too deep to grind out. A good shop will be able to advise you on what you should do.
 
Looks like you will be able to shave with those after they are ground. You might try H&J machining, 701-652-3289. They carry many different sizes of valves and priced reasonable.
 
Rod Bearings are inexpensive for a CASE engine. Those valves are junk. There is no "Margin" left to work with. If one were incompetent enough to re-use those valves, you would then have expensive repairs to deal with.
 
Your valves are too far gone. You can't just put new valves in. You need to match the valve seating surface with the seat insert that means grinding. Take it to a machine.

Joe
 
(reply to post at 17:00:46 08/12/15)
Click to expand...

I just did one that needed new seats, guides were ok and stems were good. new seats made the seating surface well down so I reground them and narrowed the edge of the valve and got a real nice wide margin. more than a new valve has. I'm sure of my work !

Some times necessity is the mother of invention, I think I heard that somewhere.

Mel.
 
What mel did can work. But, from what I can tell, he is both knowledgeable, skilled, and has the right tools to do his own work. The cost of paying a shop to re-machine several features on the valves will easily exceed the cost of new valves. Also, it looks like your engine either has had a steady diet of dirt for a while, or has been run clean for a very long while. In either case, it is likely that the stems are worn, and that the guides also need to be replaced.
 

I presume we are working with an S series engine ??? Just got off the Phone with Saeli and he has those valves in stock relatively inexpensively. He is a real source for parts for older iron and don't gouge
 
I didn't even consider an "S" engine. Valves are cheap for the "S" series engine, but bearings are $$$. Standard Rod Bearings are $34.15/Rod.
 
Yep, valves are shot. Being a gas engine where valve protrusion isn’t as critical for compression reasons (compared to a diesel), the seats should probably be reusable after re-facing. It would also be a good idea to have the head resurfaced while you’re at it. But before any of that, have it crack checked first. Looks like a crack between the seats in the bottom left picture, but without the right tools you won’t know for sure. Trust me, 90% of cracks you can’t see yourself, but then a scratch you think is a crack turns out to be nothing. Best of luck to you!
 
Thank you all for the reply's. No one likes to spend money needlessly particularly if your on a fix income. I appreciate and value all the input.
Thanks again Byron
 
Yea the guides are at max .316 S/B .312 stems are .309 I just wasn't sure if they could repair the valves. That isn't looking good. Thanks Byron
 
The valves are too far gone to grind. I really can't tell by the photos how the seats are. I'm guessing they are shot as well.

I think bearings will be hard to find.
 
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