ramdispatch Posted May 28, 2010 Share Posted May 28, 2010 On our 07 CTP713 we had an o-ring blow on the lower steel line going to the Rad.Rep;aced and drove about 50 miles Anti freeze started gushing out behind water pump.Mechanic took apart and found an o-ring (one of many back there) that was swelled up to twice its normal size.Put back together and then checked the anti-freeze and found diesel fuel in the anti-freeze.Anybody have any ideas how it got there?Appreciate any help. Bob(Canada) Quote Link to comment https://www.bigmacktrucks.com/topic/14107-diesel-fuel-in-anti-freeze/ Share on other sites More sharing options...
Rob Posted May 28, 2010 Share Posted May 28, 2010 On our 07 CTP713 we had an o-ring blow on the lower steel line going to the Rad.Rep;aced and drove about 50 miles Anti freeze started gushing out behind water pump.Mechanic took apart and found an o-ring (one of many back there) that was swelled up to twice its normal size.Put back together and then checked the anti-freeze and found diesel fuel in the anti-freeze.Anybody have any ideas how it got there?Appreciate any help. Bob(Canada)I don't know that engine but you could have defective "O" rings on the unit injectors. A lot of times they sit in a water jacket for cooling.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/14107-diesel-fuel-in-anti-freeze/#findComment-55991 Share on other sites More sharing options...
Lmackattack Posted May 28, 2010 Share Posted May 28, 2010 yep another bad idea for emission engines. lets put the injectors in a jacket that has water and if the injector cups or orings fail you will mix water and diesel... not to mention 1 electronic injector will cost the same as 6 mechanical injectors do. Quote Link to comment https://www.bigmacktrucks.com/topic/14107-diesel-fuel-in-anti-freeze/#findComment-55996 Share on other sites More sharing options...
rhasler Posted May 28, 2010 Share Posted May 28, 2010 I don't know that engine but you could have defective "O" rings on the unit injectors. A lot of times they sit in a water jacket for cooling.RobMMost likely from the injector cups (that the injectors sit in). They are sealed with an o-ring at the top of the cup & swaged into the head at the bottom. The cups have been something of a weak spot. I would suggest having a dealership check it out. It is an in depth repair requiring special tools and may still covered by your warranty. Quote "Mebbe I'm too ugly and stupid to give up!" Link to comment https://www.bigmacktrucks.com/topic/14107-diesel-fuel-in-anti-freeze/#findComment-56008 Share on other sites More sharing options...
Lmackattack Posted May 28, 2010 Share Posted May 28, 2010 I should mention this is kinda common with other makes as well.. we have had 2 3406E cats at work louse the seal in the cups and eat the injectors. Quote Link to comment https://www.bigmacktrucks.com/topic/14107-diesel-fuel-in-anti-freeze/#findComment-56016 Share on other sites More sharing options...
ramdispatch Posted June 9, 2010 Author Share Posted June 9, 2010 Thanks guys, You were right ,it was an injector cup and was covered by warranty. Thanks again! Bob Quote Link to comment https://www.bigmacktrucks.com/topic/14107-diesel-fuel-in-anti-freeze/#findComment-56889 Share on other sites More sharing options...
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