I Have a 86 TD8E that I bought for working on some property I purchased . I'll start off by stating that I am a commercial fisherman by trade and have no formal heavy equipment training, but I am mechanically inclined and have rebuilt numerous gas automotive engines top to bottom. When I bought it everything worked as it should and I have put about 120 hrs on it. I noticed it was starting to get hotter and hotter as time went on, progressively getting overheated faster and faster and I'm now at the point that it only takes 35-45 minutes and I have to stop. Here are the things that I have done so far.
1. When purchased it had a leaky valve cover gasket and the muffler was shot. Replaced the gasket, this is the only engine work done. After about 80 hours I got tired of sucking in exhaust fumes so I replaced the muffler with one I found online specifically for this machine at Finney equipment parts. Shortly after this is when I started to notice the over heating, so I took the muffler off and put a 4 ft straight pipe on it. Still was getting abnormally hot.
2. Drained and flushed the system with Prestone radiator flush. The original fluid seemed to be close to brand new in color. Replaced the fluid and still overheated so I repeated. Two flushes and new coolant mixed at proper ratios - Still overheated.
3. Replaced water pump belt and tightened. No luck
4. Replaced thermostat and inspected all hoses except the one going into the bottom of the radiator, replaced the two hoses for the oil cooler. Still overheated. At this point I will note that the original fluid was green and what I put in it was yellow and every hose I took off had yellow coolant in that area so it seemed to me it was circulating, maybe not enough?
5. Replaced the water pump which required pulling the radiator half way out so inspected lower hose and inlet, everything normal. Old water pump seemed OK but put the new one on anyways (pulling the radiator was not fun or easy so it wasn't going to be for nothing). Used air to clean out fins of the radiator and transmission cooler (two separate units). All factory shrouds in place. While putting the fan back on i realized it went on both ways so I just looked at the rotation of the water pump and put the fan on by referencing my truck. Once it was back together and running I took some dried grass and sprinkled it in front of the radiators and it was sucked in so the fan was installed correctly. Still overheating
6. Now i figure maybe the gauge is bad so I purchased a laser temp gun at Harbor Freight and started temping the engine at various points when the engine got to the check point on the gauge. Crankcase, cylinders, thermostat housing, water pump - all were in the range of 210 - 220 degrees. Hoses around 195. I took off the radiator cap (safely under a thick towel) and used a deep fry thermometer and the coolant temp was 190. If I ran it for another 15 minutes under load the engine gunned at 230.
7. This is the point I found this forum and joined so I could post my issues. Found the thread of the gentlemen having similar problems with a D7G and one suggestion was to laser temp the top and bottom. Did that and they both were around 200 degrees so again it seems it's circulating
There also was a mention about other fluids so I checked the transmission oil level and it was a little low but clear, topped it off. I believe though with a separate cooler for the transmission they are two separate systems.
I have been trying to clear off the building site for our new home before I have to go back to work and can't run it longer than 35 minutes, very frustrating.
I've included a picture of the fan.
Any suggestions?
Here is a link to the project I'm working on for those interested, all kinds of equipment being used. - http://ift.tt/1fGpP3K
1. When purchased it had a leaky valve cover gasket and the muffler was shot. Replaced the gasket, this is the only engine work done. After about 80 hours I got tired of sucking in exhaust fumes so I replaced the muffler with one I found online specifically for this machine at Finney equipment parts. Shortly after this is when I started to notice the over heating, so I took the muffler off and put a 4 ft straight pipe on it. Still was getting abnormally hot.
2. Drained and flushed the system with Prestone radiator flush. The original fluid seemed to be close to brand new in color. Replaced the fluid and still overheated so I repeated. Two flushes and new coolant mixed at proper ratios - Still overheated.
3. Replaced water pump belt and tightened. No luck
4. Replaced thermostat and inspected all hoses except the one going into the bottom of the radiator, replaced the two hoses for the oil cooler. Still overheated. At this point I will note that the original fluid was green and what I put in it was yellow and every hose I took off had yellow coolant in that area so it seemed to me it was circulating, maybe not enough?
5. Replaced the water pump which required pulling the radiator half way out so inspected lower hose and inlet, everything normal. Old water pump seemed OK but put the new one on anyways (pulling the radiator was not fun or easy so it wasn't going to be for nothing). Used air to clean out fins of the radiator and transmission cooler (two separate units). All factory shrouds in place. While putting the fan back on i realized it went on both ways so I just looked at the rotation of the water pump and put the fan on by referencing my truck. Once it was back together and running I took some dried grass and sprinkled it in front of the radiators and it was sucked in so the fan was installed correctly. Still overheating
6. Now i figure maybe the gauge is bad so I purchased a laser temp gun at Harbor Freight and started temping the engine at various points when the engine got to the check point on the gauge. Crankcase, cylinders, thermostat housing, water pump - all were in the range of 210 - 220 degrees. Hoses around 195. I took off the radiator cap (safely under a thick towel) and used a deep fry thermometer and the coolant temp was 190. If I ran it for another 15 minutes under load the engine gunned at 230.
7. This is the point I found this forum and joined so I could post my issues. Found the thread of the gentlemen having similar problems with a D7G and one suggestion was to laser temp the top and bottom. Did that and they both were around 200 degrees so again it seems it's circulating
There also was a mention about other fluids so I checked the transmission oil level and it was a little low but clear, topped it off. I believe though with a separate cooler for the transmission they are two separate systems.
I have been trying to clear off the building site for our new home before I have to go back to work and can't run it longer than 35 minutes, very frustrating.
I've included a picture of the fan.
Any suggestions?
Here is a link to the project I'm working on for those interested, all kinds of equipment being used. - http://ift.tt/1fGpP3K
'86 International TD8E Overheating
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