David Smith Posted January 6, 2006 Share Posted January 6, 2006 My ENDT 675 is pumping motor oil into the cooling system. What would you check first ? Thanks !!! Quote Link to comment https://www.bigmacktrucks.com/topic/667-engine-problems/ Share on other sites More sharing options...
mackcl96 Posted January 6, 2006 Share Posted January 6, 2006 oil cooler {copper tubes wore out in area of steel support cage} Quote Thanks for hearing me out.You can have the soap box now---------JIM Link to comment https://www.bigmacktrucks.com/topic/667-engine-problems/#findComment-3152 Share on other sites More sharing options...
Lmackattack Posted January 6, 2006 Share Posted January 6, 2006 My ENDT 675 is pumping motor oil into the cooling system. What would you check first ? Thanks !!!←check the oil cooler for cracks Quote Link to comment https://www.bigmacktrucks.com/topic/667-engine-problems/#findComment-3153 Share on other sites More sharing options...
b61mack Posted January 6, 2006 Share Posted January 6, 2006 You can get a rebuilt oil cooler from your mack dealer, i had the same problem on a 300, there is O rings in there, you get the cooler and housing together just bolt it on. Ron Quote Link to comment https://www.bigmacktrucks.com/topic/667-engine-problems/#findComment-3157 Share on other sites More sharing options...
David Smith Posted January 9, 2006 Author Share Posted January 9, 2006 You can get a rebuilt oil cooler from your mack dealer, i had the same problem on a 300, there is O rings in there, you get the cooler and housing together just bolt it on. Ron←Thanks for everyone's help. I will check the oil cooler this week. Quote Link to comment https://www.bigmacktrucks.com/topic/667-engine-problems/#findComment-3201 Share on other sites More sharing options...
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