excessive oil leak

Is that pulling the head?

 

I don't think you need to R&R the head for a rear structure leak do you?

 

Head doesn't have to come off.

We ARE talking about a detroit S60 like the OP, right?

 

What he is most likely talking about is what you might call the "bell housing" on a car.....on these motors its a large casting that bolts onto the back of the block, the flywheel sets inside of it and then the clutch housing mounts to it, then the tranny etc.....also the starter is mounted to it, that's probably the best side to visualixe it from.....anyway this piece is machined to double as one of the main oil return galleys from the rear of the motor back down into the pan....they are sealed with some kind of super goop stuff but over time they will start to leak from torque and vibration. The best time to have these resealed is when you change the clutch but of course the leak doesn't always cooperate with your repair schedule. Yes it is a big job since the driveline, tranny, and clutch all have to be removed as well as the starter and a few other items. Before doing this I would get the motor completely steam cleaned and get a second opinion as many of these DD60's leak oil form the back of the head and it looks like it is coming from the "rear structure".....if it is from the back of the head then you need a head gasket.....the most common head gasket failures in these older Detroits will leak oil from #6 area or back of the head or coolant from #1 area......when a head gasket goes bad on these it doesn't neccesarilly effect perfomance or cause contamination depending where the break is.

The oil cooler is another common culprit for messy leaks that travel back behind the block to the undercarriage of the truck and nicely coat everything in black gold.

Don't know where you hail from but I know a shop in Augusta, GA who does a lot of Detroit work and are very resonable.

 

I also have an oil leak if anyone can help. Every 200 miles like 2 gallons. Everything by the air compressor is in oil. Detroit 60s 14L egr. I get clouds of smoke coming out when motor gets close to 200 degrees. I can see the clouds goin under my truck n trailer while I drive. Soon as I hit a hill for a whole n temp starts to go up the smoke clouds start coming. My driver side fuel tank all in oil it's spitting like crazy soon as it gets a lil hotter goin up hills. Can it leak oil through the air compressor somehow?

 

The rear structure is a fancy way of saying the rear housing, they have to remove the, oil pan, transmission, clutch, flywheel, rear motor mounts, and rear housing clean it all up, and reapply the anaerobic sealant, and reassemble it al hopefully you allow them to replace the motor mount rubbers.
Just a thought!

 

@Alexevomr8- currently having the same issue. did you ever find out exactly what it was?

 

Ding, Ding, Ding! We have a winner! Rear cam seals are a major problem with Series 60 motors that are experiencing rear engine leaks. Given the time and labor involved, might as well do everything else while there, like main seal and clutch if one is close to needing one. And rear mounts, not a bad idea either. No use skimping on repair just to find out you have to go back in later to do something else. Yeah, a hit in the wallet, but everything will be done and you shouldn't have to open anything up for a long time.

 

I have a leak in my rear tires and I have abs ligth on