snw blue by you Posted May 2, 2008 Share Posted May 2, 2008 Has anyone ever had one fall out of a motor? Any idea what may have caused this? '03 Excursion, 83K, customer performed maintainience(based on the condition of K&N air filter, below average marks). Changed his oil and jet was on the drain plug. Of course he is out of warranty by time but wants it covered. Not my problem. Quote Link to comment Share on other sites More sharing options...
Rickster42 Posted May 2, 2008 Share Posted May 2, 2008 yep, seen it 3 or 4 times. probably been broken since the first few times the engine turned over,as the ones I did with real low mileage had impact damage right near the tip of the jet,like it was bent installing the rod, and the bottom of the piston skirt hit it.Real hard to say though, because as soon as they get a few miles on the engine they take quite a few hits floating around in the pan... Quote Link to comment Share on other sites More sharing options...
Bruce Amacker Posted May 2, 2008 Share Posted May 2, 2008 Ditto. Seen it/ heard of it several times. Good Luck! /forums/images/%%GRAEMLIN_URL%%/grin.gif Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted May 3, 2008 Share Posted May 3, 2008 One time myself. Customer came in with the jet in an envelope, said it came out when he changed his oil. I remember the truck was well over 100,000 miles and we were jammed with work so he had it repaired elsewhere. I am curious as to what the long term effect of running the engine with that cooling jet missing would be. Quote Link to comment Share on other sites More sharing options...
DwayneGorniak Posted May 3, 2008 Share Posted May 3, 2008 I am curious as to what the long term effect of running the engine with that cooling jet missing would be. Scored cylinder wall and piston on the last one I saw. I have seen two and heard of quite a few. Quote Link to comment Share on other sites More sharing options...
Brad Clayton Posted May 3, 2008 Share Posted May 3, 2008 Most of the people I know would run 'er til she laid down. Of course I am from the South though. Now up here in the Northeast it would be an easy fix because the frickin' oil pan is probably rotted out and in dire need of replacement as well, thus killing to birds with one stone. Quote Link to comment Share on other sites More sharing options...
Jim Warman Posted May 3, 2008 Share Posted May 3, 2008 I've seen it often enough that, when the oil is drained, I like to hit the bottom of the oil pan with a rubber mallet... and listen for a reply... Long term concerns? If the truck is an unchipped penis enlarger, the owner will probably never know the difference... If the owner is a "who needs a Kenworth, my 350 can haul that" kinda guy, we could see melt-down... Let's look at it this way... the "bottom line" is the bottom line for any manufacturer. It costs money to drill and tap these oil passages... and to manufacture and install the cooling jets.... If they weren't necessary for some instances, there's a pretty good chance they wouldn't be there to drop into the pan in the first place... Just so we're all on the same page... the job of the piston cooling jet is to direct a stream of oil to the bottom of the piston crown... This helps to draw heat from the piston. CAT has them, Detroit Diesel has them, Cummins has them... Hmmmmm.... Me? If I have reason to believe or evidence that a piston cooling jet isn't in place and doing it's intended job, I will highly recommend that the appropriate repair is made... In a round about way, we are the part time custodians of our customers finances... We must choose our repair recommendations and priorities with care... Can we put a cooling jet on the "back burner"? Yeah.... but not if he is going to be dragging his 5er all over the countryside next month... If we are to err, we should err on the side of safety.... Quote Link to comment Share on other sites More sharing options...
Brad Clayton Posted May 3, 2008 Share Posted May 3, 2008 It's a good thing the design on these isn't like the 6.4's with an actual hole in the piston the jet has to line up with everytime she comes around. Quote Link to comment Share on other sites More sharing options...
snw blue by you Posted May 5, 2008 Author Share Posted May 5, 2008 Thanks for the replys. At the very least I guess I will be pulling the pan and giving a look see, as well I will use the boroscope to check the piston and cylinder for damage. I'll let management figue out whos payin' for what. Quote Link to comment Share on other sites More sharing options...
HeuiTim Posted May 5, 2008 Share Posted May 5, 2008 I've seen it often enough that, when the oil is drained, I like to hit the bottom of the oil pan with a rubber mallet... and listen for a reply... Your engines talk to you too, thank god I thought it was the voices in my head /forums/images/%%GRAEMLIN_URL%%/hammer2.gif Bigger diesels dont run very long when a jet is not working, things tend to expand quite a bit without the oil pulling heat out of the piston. Even a bent one has caused problems over the long term. Quote Link to comment Share on other sites More sharing options...
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