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574 diesel injectors

M

makin hay

Member
Have fuel lines off, forked clamps removed, now do the injectors unscrew or pull out? I really dont want to damage anything as i have been trying to turn them and they wont budge. Thanks
 
Hi, make sure everything is very clean. The injectors pull out but you should drain coolant down some as there is a brass sleeve that may pull out with injector and that would let coolant into cylinder. I believe IH made a tool for the German Diesels to pull the injectors.

JimB
 
Great, Thanks!!! I will drain coolant and check with dealer. #2 is leaking, could it be this brass sleeve? I was thinking o-ring.
 
If it's leaking coolant it is brass sleeve. If diesel fuel it is nozzle, if compression leak, brass sleeve as that injection nozzle does not have a gasket where it seats in bottom of brass sleeve as I recall.
 
It is definetly fuel. So the injector should be replaced? I would assume if I am going to replace that I should do the sleeve as well? On my Cat there are o-rings that will go bad, I have never done an IH before. Thanks!
 
I wouldn't think you would need to replace the brass sleeve in this case. There are no o-rings to replace in the injection nozzle, it is all highly polished lapped surfaces. Some times though, a leaking fuel return or even injection line can run fuel down in along side of those and make it appear to be coming from the injection nozzle itself. But, I have seen the injection nozzle leak also. The o-ring on top end is just to keep crud out of sleeve.
 
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