injector tip cracked, 1000 miles - Ford Powerstroke Diesel Forum
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post #1 of 11 Old 02-22-2009, 09:43 AM Thread Starter
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injector tip cracked, 1000 miles

Had an injector tip that cracked on the 190cc hypermax injectors, less than a 1000 miles, question, what causes inj. tips tp crack? Pulled all of them and shipped tp hypermax to fix the cracked tip and bench test the rest. Any thoughts

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post #2 of 11 Old 02-22-2009, 09:45 AM
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I dont know what causes it but I have noticed it is happening a lot on all of the big three's diesels!

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post #3 of 11 Old 02-22-2009, 10:08 AM Thread Starter
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Do you think the bigger the inj the more prone to cracking? I am wondering this. I just want to know because like I said the injectors will be bench tested probablt Tuesday and I was thinking about having hypermax rework them to 50hp instead of keeping them 190cc. Truck is built for power, but not sure if I want 190cc everyday drivers. I am being told with the right turbo they are very good and driver friendly. I do know i will run a good non vgt turbo and sct tunes after I decide on injectors.

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post #4 of 11 Old 02-22-2009, 10:13 AM
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air in the fuel system is the usual problem, thats why your suposed to unhook the cps and crank the engine to purge any air that may have got in the system. or thats what ih states anyway
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post #5 of 11 Old 02-22-2009, 10:15 AM
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air in the fuel system is the usual problem, thats why your suposed to unhook the cps and crank the engine to purge any air that may have got in the system. or thats what ih states anyway
Thats right, I have heard that elsewhere!

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post #6 of 11 Old 02-22-2009, 10:20 AM
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i sold a $14k dt466e to bfi waste cause they didnt know to do this, and after an injector tip flew off and caused the rod to blow out the side of a recon engine less than a year old, they are well aware of the procedure now.
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post #7 of 11 Old 02-22-2009, 10:21 AM
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tips

Water or air will crack it and EDM or EH.EDM will mess up the temp of tips.

my 2 cents
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post #8 of 11 Old 02-22-2009, 10:22 AM
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Did the injector with the cracked tip still work(in some capacity), or did it quit working entirely. I would think in your situation with only 1k on them that it was a manufacturing defect. Nobody's fault, just one of those things. Hypermax injectors are very good, and the power difference if you step down a little from the 190's is alot less than you would think.

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post #9 of 11 Old 02-22-2009, 12:15 PM
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Fuel pressure loss would also cause injector tips to crack. If an injector isn't getting enough fuel then it doesn't have that fuel to cushion itself and thus nozzles start to crack. Although it could be manufactor's defect or anyother issues that have been mentioned, just thought I would throw that out there as well.

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post #10 of 11 Old 02-22-2009, 02:54 PM Thread Starter
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Quote:
Originally Posted by 19558077 View Post
air in the fuel system is the usual problem, thats why your suposed to unhook the cps and crank the engine to purge any air that may have got in the system. or thats what ih states anyway
Tell me more about this???? Also I am sre its manufacture error, just one of those things.......

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