oil leak in coolant tank and part identification of dd15 engine.

I never saw an oil cooler fail in a Detroit. If it’s it does fail the oil will be so thick you can stand a spoon up in it. 3k is good price for a reman head. Your liners were probably pitted causing a little oil to leak into the coolant. That willl also give a lot blowby if the liners are worn. A bad egr cooler will cause you to lose coolant. You’ll also have some white smoke when starting out the exhaust. If they get bad enough. It will look like mud in the coolant reservoir.

 

I dint know what u mean by accessories. But 3k is about right for a reman head. I wouldn’t buy a used one unless it’s guaranteed to not be warped or cracked. You ll never know until you get it back together. I would just spend the extra for a reman one.

 

That’s high for an oil cooler I bought one a freightliner for like $160 with the ring seal kit. I had the same issues as your having and turned out be a piston liner. Little oil in the coolant a lot blowby. The block with have to be repaired if that’s the case from cavitation.

 

With that many miles it’s best just do an inframe. It d probably cost you 7 or 8 gran just to replace the liners and counterbore the block. You should be able to get it inframed for 12k with a year warranty unlimited mileage. Rebuilding it from the block up and then replace rod and main bearings on the crankshaft through the bottom. If you guys are mechanically inclined you can drain the oil out of it and remove the oil pan and look up into the cyclinders and look at the liners but that’s probably where the oil is getting into the coolant

 

It’s called a core charge. They charge a certain amount for your core if you don’t bring it with u. They give it back if you send your core so it looks like if you take the old one in they will refund 1498

 

If they found it was cracked then the core may be no good to them, in that case they will not refund the core charge.
Standard charge.