injector cup longevity question
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Laughing Gas
Joined: Apr 2009
Posts: 903
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From: melbourne beach, fl
injector cup longevity question
Been thinking about what the lead contributing factor for cracked injector cups. Would it be age/ fatigue, defective production run, metal composite, running bigger injectors, or scenarios with decked heads and higher compresion? certainly someone has knowledge in this realm, thankx, Ronjon
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Joined: Apr 2004
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My number #8 cylinder inj cup developed one small hairline crack at 180K. I don't believe it was due to a defective product but just normal wear and tear. I think there is a possibility improper SCA levels may influence cracks and pinholes but I'm not certain. Are your's bad?
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Laughing Gas
Joined: Apr 2009
Posts: 903
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From: melbourne beach, fl
got a rebuild going on and just ordered new cups. The heads will then be brand new as already did the comp cams 910-16 springs, and new seals and intakes. Just curious, and this is a spare motor so did not have any symptoms, although had 210k on the motor.
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It's funny as I just had my injectors out about four months ago when I installed new O-rings, and the cups were fine. I pressurized the system then and there were no leaks. I removed my injectors a month ago as they were not seated properly, (operator error
) . I repressurized the system and found one leaking cup, but it wasn't from the same sleeve the improperly sealed injectors came out of. So even if I had properly seated my injectors the first time, I had a serious problem underway. I can smell the diesel in my coolant because of this leak.
) . I repressurized the system and found one leaking cup, but it wasn't from the same sleeve the improperly sealed injectors came out of. So even if I had properly seated my injectors the first time, I had a serious problem underway. I can smell the diesel in my coolant because of this leak.
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