cracked injector tip

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Apr 25, 2016 | 04:36 PM

ss72450

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cracked injector tip

Thanks for all the valuable info here. My question is can a cracked injector tip let gases back in the fuel system?

Apr 25, 2016 | 05:38 PM

wedge542

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Yes it can, pull the filter out, use the crank wire on left fender to turn motor look at bubbles in filter housing while cranking.

Apr 25, 2016 | 07:06 PM

ss72450

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Thanks, I tried that first and it actually blew fuel out of the bowl. I then did the balloons to see what side it was and pulled those injectors. I found one with a cracked tip and everything else looked ok. I was having a problem with heavy smoke and pretty sure the cracked tip was the cause of that, just wasnt sure about all the air.

Apr 25, 2016 | 07:58 PM

m-chan68

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From: Woodbridge, Ontario, CA

The bigger, and most important question will be WHERE the end of the broken tip ended up, and how much damage did it cause?

Apr 25, 2016 | 08:24 PM

87crewdually

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Joined: Dec 2006

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From: So. Jersey

........ and to add to m-chan68's post, how long were you driving it like that. Fuel dumping from a cracked tip is a good way to torch and melt piston tops.
I'd check compression with a gauge to be on the safe side. Compare all cylinders and they should be within 10% of each other.
Also next time when you do the balloon/bubble test, pull one glow plug at a time until the bubbles stop. Then you know that's the problem cylinder.
Hopefully all is well. If it burnt a hole it would build pressure in the crankcase.