You've came this far, take it to a machine shop and have them hot tank and magnaflux the head. I would completely rebuild the thing and be done with it. Grind the valves and seats, fix the rocker, then put it back together with no worries.
what the hell is wrong NOW?! head gasket? head crack?
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- #23
seriously, AS you typed that, I was typing up a new post about my cracked precups...
sent PM
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- #24
precup 4
new ones
New 3B head on Ebay AU. for $499.00
crushers
post ho
i hate to tell you this but i suspect the leak has NOTHING to do with the head gasket or the head the location of the antifreeze cancels that assumption...
did you so the coolant pressure test when the engine was cold? did you actually see the coolant come out somewhere? did you take the pressure up to 16PSI for the test?
i would pressure test the "new" rad for a pin hole, replace all the hoses, check the impeller shaft on the water pump and test the rad cap...
sorry for taking so long to respond...
did you so the coolant pressure test when the engine was cold? did you actually see the coolant come out somewhere? did you take the pressure up to 16PSI for the test?
i would pressure test the "new" rad for a pin hole, replace all the hoses, check the impeller shaft on the water pump and test the rad cap...
sorry for taking so long to respond...
crushers
post ho
do you have cracks between teh valves? if not then there is nothing wrong with your head either...
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- #29
honestly, i suspect you may be right about the head. The leak was definitely coming from the back half of the engine, but I didn't find anything on the head or gasket that really looked like it was the problem.
so, yeah, i think i might have been a little rash. nothing but good will come of it though, ive got new precups now, a new head gasket, ground my f*ed up rockers, and will have properly set valve clearance. No downside.
so, yeah, i think i might have been a little rash. nothing but good will come of it though, ive got new precups now, a new head gasket, ground my f*ed up rockers, and will have properly set valve clearance. No downside.
crushers
post ho
the rockers can be ground to take out the divit... do not try and adjust with the divit remaining... the setting will vary...
s*** happens.
s*** happens.
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- #31
already done. that divit was causing ~1/16" of clearance on that valve, I wonder if things will run better now?
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- #32
All back together. Notes, please feel free to comment:
I couldn't, for the life of me, sink the precups as close as the FSM specified (+/-0.05mm; I could only get +.10mm on the worst one) even after cleaning the holes. Hopefully this won't cause any problems.
I adjusted the valve clearances to 2x what the factory specified, because I only had hot clearance specs, but my motor wasn't capable of operating yet (was cold) and I didn't know what happens if you are set too tight. All of my valves were *way* off, clearances on the order of 1/16" or 1/32".
A little scary and smokey when bleeding the injectors (this was the first time I'd done that), but when I tightened that last fitting... prrrrr. I've never heard my engine so quiet! It runs GREAT!
BUT! The leak is still there, hahahaha! This was all for nothing! I found a tiiiiiny pinhole in that heater hose after all.
I've really gotta learn to slow down, this was epic stupidity.
In any case, I've got an engine that runs even better than it did before, and no longer have to worry about my precups dropping. I guess thats a good thing....
I couldn't, for the life of me, sink the precups as close as the FSM specified (+/-0.05mm; I could only get +.10mm on the worst one) even after cleaning the holes. Hopefully this won't cause any problems.
I adjusted the valve clearances to 2x what the factory specified, because I only had hot clearance specs, but my motor wasn't capable of operating yet (was cold) and I didn't know what happens if you are set too tight. All of my valves were *way* off, clearances on the order of 1/16" or 1/32".
A little scary and smokey when bleeding the injectors (this was the first time I'd done that), but when I tightened that last fitting... prrrrr. I've never heard my engine so quiet! It runs GREAT!
BUT! The leak is still there, hahahaha! This was all for nothing! I found a tiiiiiny pinhole in that heater hose after all.
I've really gotta learn to slow down, this was epic stupidity.In any case, I've got an engine that runs even better than it did before, and no longer have to worry about my precups dropping. I guess thats a good thing....
All back together. Notes, please feel free to comment:
I couldn't, for the life of me, sink the precups as close as the FSM specified (+/-0.05mm; I could only get +.10mm on the worst one) even after cleaning the holes. Hopefully this won't cause any problems.
I adjusted the valve clearances to 2x what the factory specified, because I only had hot clearance specs, but my motor wasn't capable of operating yet (was cold) and I didn't know what happens if you are set too tight. All of my valves were *way* off, clearances on the order of 1/16" or 1/32".
A little scary and smokey when bleeding the injectors (this was the first time I'd done that), but when I tightened that last fitting... prrrrr. I've never heard my engine so quiet! It runs GREAT!
BUT! The leak is still there, hahahaha! This was all for nothing! I found a tiiiiiny pinhole in that heater hose after all.
In any case, I've got an engine that runs even better than it did before, and no longer have to worry about my precups dropping. I guess thats a good thing....
CONGRTAS!!!
On both finding the leak and all the other work you did! You learned alot and have a much better longer last rig for it. I need to find the guts to pull me head and check everything out...you give me inspiration!!!
Last edited:
Congratulations and well done.
my question is how in the hell did you get a toyo diesel in California?
So thats what the 3b looks like......Interesting.
I'm from across the forums over on the 60 and 80 side. I just decided to drop by.
So thats what the 3b looks like......Interesting.
I'm from across the forums over on the 60 and 80 side. I just decided to drop by.
cruiser_guy
Out of Africa / North Africa
Personally, I would not pull the head unless there is a problem. Of 3-4 3B's I've torn down not one has had a good head though they were all running fine except one.
I would however recommend pulling the rockers and checking them as they can easily be fixed/replaced and you won't risk opening a "can of worms".
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- #38
x2, ignorance is bliss!
