Briaineo

Hi

2003 grand Cherokee 2.7 diesel

Was driving last night and the belt tensioner snapped, was only a few miles from home so drove it back! It did run hot.

Opened the hood and saw that all the oil made its way into the coolant system, it was coming out of the expansion tank.

Just wondering if there is another way other than through the head gasket or a crack in the block for the oil to enter the coolant system?

Could the oil push past rings when very hot and be OK after?

Was told to remove the expansion tank + rad & clean oil out, replace tensioner put back together and see what she does?

This happened before to anyone? Did a search can't seem to see anything.

If the heads gone can it be skimmed or is a new head required?

Thanks

Bustedback

Is there an engine oil cooler in the radiator?

Briaineo

No not as far as I can see, only the auto transmission

andrewmp6

I wish we could be more help but we never got the diesel in the usa.But it sounds like to me you have a blown head gasket or cracked head.

Briaineo

Possibly the head but there is one other possibility; which is the oil cooler it's not on the rad but is located on the back of the filter casing: this engine is also in the Mercedes sprinter van has this has caused this problem on them, might as well rule that one out before tearing down. There is no evidence of any water in the oil whatsoever so fingers crossed. No overheating issues either.

Briaineo

http://www.mercedes.gen.in/WP35/mercedes-sprinter-engine-oil-in-coolant-water-oil-cooler-leak-fix/