agm2112 Posted February 18, 2020 Report Share Posted February 18, 2020 On sunday night I was driving on a highway at mid speed when the "overheating" icon appeared on the dashboard. I stopped the car and opened the hood... the cooling system was absolutely dry. Luckily I was less than a mile from home, and returned stopping two times for 20 minutes to cool the engine, under heavy rain. I found the problem on the oil cooler. One of the three plastic water seals simply popped out, allowing all colling fluid to jump to the road in ten seconds. I believe this is a very bad factory defect, that puts the entire engine at risk (and a car stopped on the road under heavy rain) for such a simple piece of plastic.... Quote Link to comment Share on other sites More sharing options...
larryl Posted February 18, 2020 Report Share Posted February 18, 2020 Yes it happens and they are a really crappy design in an otherwise great engine.....whoever designed it was an idiot agm2112 and jkeaton 2 Quote Link to comment Share on other sites More sharing options...
2late4u Posted February 18, 2020 Report Share Posted February 18, 2020 first iv ever heard of this happening here on a journey. thanks for the picture of the oil cooler..does seem weird that it is designed like that wonder why the ends look like that looks like it was designed to cool other things or what ever,,,,, that said put 70 k on my 2011 .3.6 eng and just turned 100 k on my 2014 3.6 eng no problems with either except the oil pressure sending unit o the 14. glad you were able to get it fixed before damaging your engine jkeaton 1 Quote Link to comment Share on other sites More sharing options...
John/Horace Posted February 18, 2020 Report Share Posted February 18, 2020 Almost looks like frost pushed out thermowelded cap. But glycol and south location nixs that possibility. Glad you got home safely, scary failure. Mine failured last Jan on the oil side; I think orings against block, not really positive. Topped up twice 1 liter in 24 hrs, then found leak( car at 80k miles or 120kms). Date stamp on my part shows Nov 2013 manufacture. 2014 was first year of redesigned part, lots of 3.2 jeeps had issues as well. Plastic holds up on oil pans and valve covers, heat exchanger should not be a problem IMO. Design or manufacture flaw, hard to know. Save your oil filter cap off old heat exchanger; one person had issue with fitting inside cap breaking. larryl and jkeaton 2 Quote Link to comment Share on other sites More sharing options...
agm2112 Posted February 18, 2020 Author Report Share Posted February 18, 2020 48 minutes ago, John/Horace said: Save your oil filter cap off old heat exchanger; one person had issue with fitting inside cap breaking. I won´t replace it (yet). I took it to a (machine shop ? - I don´t know the name in english), will try to open a thread on the hole and build a nylon screw to cover it. jkeaton 1 Quote Link to comment Share on other sites More sharing options...
John/Horace Posted February 25, 2020 Report Share Posted February 25, 2020 There are thermowelding kits available for plastic. Walls kinda thin on heat exchanger housing for threading IMO. Quote Link to comment Share on other sites More sharing options...
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