Ford 3000 Valve guide wear

acaswell · Feb 26, 2017

I'm rebuilding the diesel engine on my Ford 3000 and found that one of the exhaust valve guides was worn out of spec. Should I just ream that one valve or all of them while I'm in there? The rest are well within tolerance.

pomester · Feb 26, 2017

"If it ain't broke, don't fix it"

I should follow that advice myself.... we'll see if anyone else has a contrary opinion...

Fordfarmer · Feb 26, 2017

Considering the cost, I'd at least replace all the
exhaust valves, if not ALL of them, with new ones
with +.003" stems. Not a big expense, and then it's
done right.

acaswell · Feb 26, 2017

Thanks. I'm not sure that the +.003 will work. I was thinking of going with the +.015. Is there any disadvantage to going with the larger stem? Any suggestions on a reamer?

Brianjbell · Feb 27, 2017

I just replaced all of the valves on my 4000. #3 exhaust was stuck bad and the other 2 exhaust were sticking somewhat. I ended up having to have the machine shop bore and replace the #3 guide. I just bought
a new valve overhaul kit that had the valves, spring and keepers and they took care of it. Cost me 85 bucks in total for the job. Money well spent I think.

Fordfarmer · Feb 27, 2017

.003" was an oversize that stuck in my head. Now,
I'm not even sure that was for a thousand series
engine.
If .003" won't for sure give you a good fit, then yes,
go bigger. No disadvantage to bigger stems that I've
ever heard of, unless you're talking about high RPM
race engines. That's a very small percentage of the
valve face diameter. On a low RPM engine like this,
the difference in flow will never be noticed.

acaswell · Feb 27, 2017

Thanks for the info guys! Looks like new valves all around for me.

Ultradog MN · Feb 27, 2017

I bought an NOS 36/4600 head on Ebay a few
years ago. Ebay seller had bought 3 of them
at a government auction. It was just a blank
head - no valves, springs, rotators, etc in
it. Didn't even have the studs for the
injectors in it.
I bought all those parts and put them in.
It was just sitting on the shelf here and my
pal Kenny needed a fresh head for his 4600
engine he was rebuilding. He offered to make
his head "new" again if I would trade him.
I made the trade. He brought his head in and
told them to make it new.
Paid a pretty penny to have it done.
I could see they were all new springs and
valves in it. I asked him if they reamed the
guides and put in oversized valves. He said
no. The machinist told him since he wanted
it "new" he went ahead and bored the guides
and installed bushings to bring them back to
standard and used new standard valves. Said
that was much better.
I couldn't see how that was better than OS
valve stems but he assured me it was.
Dunno...
I still have the head here. One of these
days I'm going to do another gas to diesel
conversion on a 201 I have and will use it
then.

Ford 3000 Valve guide wear

acaswell

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pomester

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Fordfarmer

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acaswell

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Brianjbell

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Fordfarmer

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acaswell

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Ultradog MN

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