![]() The same could also be happening due to a bad head gasket but that will typically allow the coolant into the engine much easier than the lower seal on a precombustion chamber will so should be much easier to diagnose as being the problem.īeyond that I really don't know what else you can check, or do as you've already covered most of the basic checks already. If that's the case eventually it will erode away at the metal around the leak and you'll start seeing coolant getting into the engine when it's not running, but as long as it is running combustion chamber pressures are high enough to keep the coolant out. (GST applies to buyers in Australia) (Price entered as: AUD 70,000) Finance for as low as CAD 1,202.50 monthly. ![]() If your engine has precombustion chambers it's possible one of them didn't seal and combustion gasses are entering the coolant system that that way. You also said it had been overhauled and the problem started shortly thereafter. Even though it checks good (ie-the impeller is tight on the shaft) when you look at it, once the system heats up the impeller will slip causing a reduction in coolant flow and an overheating problem. The increased vis and white color that you saw is water contamination. You can use other commercial TDTO oils as long as they comply with the specification. The attached doc is the current Cat lubrication recommendations. Another thing I haven't seen personally, but have heard about on several occasions, is a bad water pump. The dozer uses TDTO for the transmission. Taking one apart, or removing it will usually cause the coolant to flow too fast (((not hanging around long enough to pick up heat like it needs to in the engine and flowing through the radiator too fast to transfer enough heat out of it))) again casing an overheating problem. I had a look at the chains & cannot seem to find an apparent master link. I am thinking it is time to take one link out & get some more adjustment out of it. 2.5 Caterpillar D4D Track-Type Tractor Dozer with Blade & Ripper - mfd by NZG in W Germany. Next, how did taking the center out of the thermostat work? Usually if a bad thermostat is causing one to overheat it's because it's stuck shut so no coolant can flow. On my Cat D4D dozer, Ser 78A5667, new to me since last Oct., the left hand track appears to be at the end of its adjustment when putting grease in the hyd adjuster. Re: Cat D4d overheating in reply to Avalon Farm, 04-30-2013 12:22:49įirst, flushing the radiator might not be enough, it may need to be rodded out to clear out clogged tubes that the flush won't touch.
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