Okay, just joined ACMOC, and here goes. Picked up a very tidy D2, 5U series in exchange for some excavation work, has 8417 hours, and starts and runs beautifully. It hardly smokes at all, maybe a wee bit of blue haze. But the exhaust slobber is terrible, there's wet black oil all inside the exhaust, and spatters everywhere when its working hard. It has decent compression, doesn't take long on the pony to get it to fire up. Top of the radiator is quite hot when running, but the bottom hose is always cold. Does it just need to run hotter, or could it have glazed bores or something? Any advice on how to fix this wet stacking would be great. This is my first Caterpillar, so any advice on where to get filters and parts would also be appreciated.
cheers from New Zealand.

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What temp does it show on the temp gauge? It should be up in the normal range when working it. It sounds like it needs to be worked hard for a period of time to get any glaze off the cylinder walls. Does it use alot of engine oil? Dont let it idle for extended periods either, that is hard on them.

Hi, Fieldchief5U.
Welkum too ther 4um.

If my understanding is 'kee-wrecked', there should be about a 15 - 20 degree temperature drop between the top and bottom radiator hoses. If you have more than that, your radiator core may be partially blocked and need cleaning.

The slobber can usually be cleared up by working the machine HARD for a while, several hours to a full day. If your machine has a dozer blade fitted, it is worth bearing in mind that dozer work, even HARD dozer work does not keep the machine working hard all the time, unless you are deep ripping, root plowing or similar.

Just my 0.02.

Hello Fieldchief5u, I have a 1950 D2 5U also. Serial #6453. I am experiencing the exact problem. It slobbers like a champ when I run it in parades or around the grounds. When I hook it up to a disk to work the fields, the problem goes away after 20 minutes of hard running. I always cover the radiator with a piece of cardboard to keep the temperature up. I ran it last week very hard for 4 hours straight and it never slobbered after it warmed up. The temp gauge ran just above 180 the entire time. I am sure the problem will come back if I drive it around with no load on it.

Hi, D4Angelo.
So keep both your own and your D2's tired butts WORKING. LOL.

Just my 0.02.

Hey Deas, that sounds like some good advise.

I'm going to put a new thermostat in the ol girl today, and I'll flush the cooling system. The bottom hose is always cold, top of the radiator is hot after work, but you can hold your hand on it. Need to get the temperature gauge working, fixed the fuel pressure gauge the other day, needle was gummed up. Hopefully the slobbering goes away. One other question I have, what sort of fuel consumption is normal for a D2? I've only done 3 hours work on a full tank, and it's only got half a tank left. Thanks for the responses 

My D2’s burn around 1 gallon an hour under a decent load, and about 1-1/2 gallons an hour if I’m working one flat-out with a steady heavy load on the drawbar. If you’re losing that much fuel, pull the diesel engine’s dipstick and make sure it’s not overfull and smelling like diesel, because the rubber o-ring seal between the fuel tower and injection pump can go bad and start leaking fuel into the crankcase. Another thing to check is the “tell-tale” drain tube below the fuel transfer pump, if the transfer pump packing seals start to go out you’ll see fuel running out of that tube and onto the ground.

Now that you mention it Sasquatch, the drain hose for the transfer pump is wet. Probably leaks worse when it's running. That I guess is also contributing to the low fuel pressure it has. Cheers for the help