DC valve guides

casered

Member
Started disassembly of the head on the DC today and the guides are worn REALLY bad and need serviced. Looking for opinions here. Would you just press them out and put in new ones or have them bored out and sleeves put in them? I see there are a couple different places out there that have them available but I am not sure if the companies are reputable to deal with or not. I have the means to replace them myself. I am leaning to doing that and then just take the head to my local machine shop and have the valve seats ground. This hinges on if the ones available are correct. I know the exhaust and intake guides are different.

So whats the opinions out there on this repair?
 
I would simply replace. I would even be
John Saeli would have them sitting on the
shelf and ready to ship.
 

I'd take the head to the shop and let them deal with the guides. The guides will most likely need to be reamed a little before the valve stems will fit correctly. I did a little of this kind of work when I worked at an auto parts store. We had all the machine tools for rebuilding heads and I don't remember having guides for specific engine brands. We would remove the old guides and pick out guides from our stock by measurements. We would have to ream the head a little to fit the new guides, then ream the inside of the guides to fit the valve stems into the guides. We could also remove and replace the valve seats.
 
If you are comfortable with doing it yourself and have the tools install and reem them to spec.

I had Arnold?s Parts Supply install new guides, reemed them, ground the valves,installed new valve springs, planed the head surface for
$490.00

John Saeli supplied the springs they couldn?t find.

I?m happy
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I think I am just going to put new ones in then and proceed from there. I have all the new springs and valves and keepers from
John already but he will be hearing from me anyway because I want to get some new head studs from him. I may have the head planed
like you did Pastor John and the block while its out and have the sleeve counterbores done to match it.

Its really amazing that this tractor even ran at all. There is almost an 1/8" gap between the pistons and sleeves and most of the
exhaust seats have been hammered to submission. Plus the #3 exhaust valve has 3 separate cracks and is burned through in one spot
really bad. I will put some pictures up for all to see.
 
Those old DC?s are work horses and will run to the very end!

The machine shop said my guides were worn enough to almost fit two valve stems down them (an over exaggeration)

Good luck
a179135.jpg
 
Here are the pics. The valve and then each
of the seats. The exhaust seats are all
shot and I can't understand how they
sealed! And the tractor would start right
up and run. Just amazing!
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a179141.jpg
 

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