Check all cooling system hoses for cracking or stretching. Stir the water in the pan. Oil was clean when we changed it before we started spraying, so we haven't run it maybe 500 miles so hopefully the engine will be fine. CAT WATER PUMP C15 DOME DRIVE. If it is leaking, the water pump will have to be replaced. Start the engine. The cooling system retains a constant test pressure for at least five minutes. A loss of coolant is found. If the cooling system is equipped with a sight glass, the level of the coolant should be to the proper level on the sight glass. Scan tool for Detroit DDEC IV Akkaid posted Jan 7, 2021 at 6:01 AM. The proper glycol concentration will ensure adequate freeze protection. A weep hole has been machined in the water pump housing in order to allow this coolant/seal lubricant to drain from the pump housing. The engine oil will have a milky appearance if contamination from the cooling system is present. The water temperature regulator must be below the surface of the water. 17: $237.55 $ 237. If internal leakage is suspected, refer to "Testing The Radiator And Cooling System For Leaks" for instructions on pressure testing the cooling system. Most water pumps have a drain opening or weep hole that prevents water from getting past the second seal into the bearings and the rest of the engine if it is a gear driven pump. This surface must be clean and free of corrosion. Cooling systems that are not regularly inspected and maintained may be the cause of increased engine temperatures. It had some sensors in the wrong places. After ten minutes, remove the water temperature regulator. 1U-7297 Coolant/Battery Tester or 1U-7298 Coolant/Battery Tester. Slowly release the pressure from the cooling system and remove the filler cap. Personal injury can result from hot coolant, steam and alkali. Internal leakage of engine coolant will be indicated by a scheduled oil sampling result that indicates a positive test result for ethylene glycol in the engine oil. So, we take it to Fargo and have them run it on the dyno. The water pump pressure should be 100 to 125 kPa (15 to 18 psi). Ensure that the cause of any internal leakage is addressed prior to repairing the leak. Keep your water pumps performing properly with high-quality replacement parts. For an example, refer to the Illustration 1. The names Caterpillar, John Deere, JD, JCB, Hyundai Add to Cart Add to Cart Add to Cart Add to Cart Customer Rating: 1.0 out of 5 stars: Price: $182.69 $ 182. Either of the testers can be used to check the freeze point of the coolant. If you think there is a leak, inspect the coolant reservoir. The mechanical forces that are created by the pumping action of the water pump are considered to be a common cause of cavitation. Even barred the engine over until my arms got too tired to do it any more with no leaks. If a pressure indication is shown on the indicator, push the release valve in order to relieve pressure before removing any hose from the radiator. Cat® C12 Diesel Marine Propulsion Engines, with ratings of 340-490 bhp (254-366 bkW) at 1800-2300 rpm, meet IMO II emission standards with the exception of the 497 mhp (490 bhp) rating at 2300 rpm which meets IMO I emissions standards. Use the following procedure to check the cooling system for leaks: The cooling system is not considered to have leakage if the following conditions exist: The cooling system may have an internal leak if the following conditions exist: An internal leak can also be detected by regularly scheduled oil sampling. $1200 later, Cat says engine is running and pulling perfectly. Refer to Disassembly and Assembly, "Water Pump" for the replacement procedure of the water pump seals. Avoid contact with skin and eyes. Temperature and pressure work together. As the glycol concentration increases, the concentration of dissolved solids and undissolved chemical inhibitors in the cooling system also increases. Remove filler cap slowly to relieve pressure only when engine is stopped and radiator cap is cool enough to touch with your bare hand. The internal seal on the water pump shaft has failed. Remove plug (1) from water manifold assembly (3). Refer to the testing procedure in Operator Manual, NEHS0605. The level of the coolant should not be more than 13 mm (0.5 inch) from the bottom of the filler neck. CORE- CAT C12 WATER PUMP, CAST# 176-6999: REMAN WATER PUMP CAT C12 3176B: C12 REMAN WATER PUMP, INCLUDES GASKETS AND BOLTS CAT W.P. 15: $133.17 $ 133. No external leaks either. Truck/engine sat for a … You will be getting a complete water pump, WITH a clean, open weep hole passage, too.If your big, short hose between rear of water pump and oil cooler is getting old and bulged out, I would definitely replace it, too. Caterpillar C12 (Stock #522-11513) Engines & Engine Parts / Water Pumps. Dripping water or a rusty appearance at this location indicates a pump shaft or seal failure. sure glad catguy is here to actually help. Read the two level indicators for the cooling system that are in the top of the radiator. Elevation also affects a pressure type cooling system. Pressurize the cooling system to a pressure that is 20 kPa (3 psi) greater than the rated pressure of the filler cap. Check the coolant solution frequently in cold weather for the proper glycol concentration with the 1U-7297 Coolant/Battery Tester or 1U-7298 Coolant/Battery Tester. The C12 took its place and was a almost 12 liter engine. A pressure type cooling system tends to inhibit the formation of air bubbles within the cooling system. The coolant level must be within specifications prior to testing the cooling system. I can't remember specifically with the c12, because i haven't worked on a lot of them... but, in 99.9% of cooling system water pumps, there is an airspace between the cooling system and the crankcase where a weep hole will leak coolant 'on it's way' to the oil side of the engine. Intermittent leakage of small amounts of coolant from this hole is not an indication of water pump seal failure. The 8T-2700 Blowby/Air Flow Indicator is used to check the air flow through the radiator core. Check the accuracy of the engine coolant temperature gauge and coolant temperature sensor if you find either of the following conditions: You can also use an Electronic Service Tool such as CAT ET to read the engine coolant temperature. Keep the water at the correct temperature for ten minutes. Problems of C-12 engines; tend to be water pump weep hole can become plugged, thus when water pump seal leaks, it pushes coolant into the oil pan. Found some loads to get me to Bismarck to have it checked. Look for damage to the seals and damage to the cap's sealing surface. New bypass valves, new filter base, new oil pump… This check will determine if the water pump is operating correctly. At operating temperature, engine coolant is hot and under pressure. Refer to the testing procedure in Operating Manual, NEHS0554. The chart also demonstrates this effect. Free shipping on many items | Browse your favorite brands | affordable prices. This item CAT WATER PUMP C12. The cooling system does not hold the test pressure for the required five minutes. Good Used Caterpillar C12 oil pump 9Y-3794, and oil pump elbow, 122-0760. Step 6: Inspect the coolant reservoir. Next: the cylinder head gasket can seep coolant into the oil pan, BUT the new procedure and head gasket is a excellent repair= have great success, 2. The reading on the water temperature indicator should agree with the test thermometer within the tolerance range of the water temperature indicator. By Geoff Weeks - Sunday, April 03, 2011 4:28 PM: Refer to the testing procedure in Special Instruction, SEHS8712. 69: $294.15 $ 294. CAT WATER PUMP 3176. No loss of coolant is found. So now oil can get into your fuel, or worse, fuel can get into the oil. Start looking for coolant drops.If it comes down the right side of the front cover, then the water pump need replaced.If it comes down the internal, side of the block, by the cam area, or drips off the cam lobes= head gasket . CAT C12 Timing Cover - 1694172 Most water pumps have a "weep" hole, or a bypass hole that lets water flow through it in case the pump bearings and seals have failed. This allows the temperature to radiate throughout the pan. A differential pressure can be measured between plug (1) on water manifold assembly (4) and plug (8) on the inlet side of water pump (7). Use the 4C-6500 Digital Thermometer for the diagnosis of both overheating and overcooling problems. Two most common items are: 1. water pump weep hole is plugged = thus the failed water pump seal is now pushing coolant into the weep hole area, BUT it can't leak externally(=plugged with grud), thus it pushs on the oil seal, and pushs coolant into the geartrain area and you get coolant in the oil.2. Compare the gauge's reading with the specification of the filler cap: If the filler cap is damaged, replace the filler cap. Inspect the fan drive belts for cracking or separation. Check the coolant level in the cooling system. Coolant has not been observed leaking from the engine. Check the engine oil dipstick for signs of an internal coolant leak. Cat® Water Pumps are built to extremely tight metal-to-metal clearances. Look in the radiator filler neck for air bubbles or combustion gas in the cooling system. For more information on coolant specifications, refer to the Operation and Maintenance Manual, "General Coolant Information". By Geoff Weeks - Sunday, October 24, 2010 2:09 PM Works in same way a water pump works. Next: the cylinder head gasket can seep We have been using it on the water trailer. 55: Sold By: Accu Auto Parts: The engine runs at a normal temperature, but a hot temperature is indicated. Probably another question for Catguy!?!?!? Cat water pump. Ensure that the filler cap's pressure rating conforms to Caterpillar's application guidelines. The testers are identical except for the temperature scale. Cooling system pressure will have an effect on the cooling system temperature. Personal injury can result from escaping fluid under pressure. Making contact with a running engine can cause burns from hot parts and can cause injury from rotating parts. A weep hole has been machined in the water pump housing in order to allow this coolant/seal lubricant to drain from the pump housing. Run the engine until the temperature reaches the desired range according to the test thermometer. Do not replace the water pump seals unless you find a continuous flow of coolant, or a large amount of coolant, that is leaking from the water pump housing. The following chart assists in determining the proper concentration of antifreeze to use. Adding pure antifreeze as a makeup solution for the cooling system top-off is an unacceptable practice. The testers can be used for antifreeze/coolants that contain ethylene or propylene glycol. The engine runs at a temperature that is too hot, but the coolant gauge indicates a normal temperature. Ensure that the differential pressure is within specifications. Home ... on the B and C there was a kit installed when engine was new and dripping at the weep hole some that was a peice of foam stuck in there so it would not drip and would evaporate as it leaked instead of dripping. Note: A small amount of coolant leakage across the surface of the water pump seals is normal. Erich,if it"s any consulation to you ,I will say that I've put 531,000 miles on my 475 accert twin turbo cat with no problems except for 1 water pump and a starter.Other than that it's done well. Parts & Repair Options By Industry call Electric Product Suppport Caterpillar preventive maintenance expert, Nick Rummel, shows you how to identify potential problems by performing a simple water pump weep hole inspection. Air bubbles are the cause of air pockets, or steam pockets, which can damage the cooling system. Are C12 Cat engines a good motor - Engines - Let's Truck Problems of C-12 engines; tend to be water pump weep hole can become plugged, thus when water pump seal leaks, it pushes coolant into the oil pan. I'm thinking head gasket/head? The addition of pure antifreeze will increase the concentration of glycol in the cooling system. C12 REMAN: Water Pump for a Cat C12. Check the operation of the water temperature regulator by measuring the regulator's opening. injector cup problems in the past for us have resulted in fuel in the coolant and would boil over the over flow. Ensure that the coolant level is above the top of the radiator cores. For information that relates to the correct pressure rating for your application, refer to the Parts Manual. The testers give immediate, accurate readings. If it is the waterpump, when it pushes on the oil seal, does it ruin it or will just replacing the waterpump fix it? If necessary, place a cover over part of the radiator in order to cause a restriction of the coolant flow. Make sure that air flow through the radiator is not restricted. The radiator and all lines to heaters or the engine contain hot coolant or steam. We just had to overhaul our c-12 at work, with at 500k because of water in the oil, not sure what they exactly decided cased it. If the distance is less than 10.4 mm (0.41 inch), replace the water temperature regulator. This group can be used to check temperatures in several different parts of the cooling system. Investigate the cause of coolant that has been found in the engine oil by removing the engine oil pan and investigating the cause of the leakage. One cause for a pressure loss in the cooling system can be a damaged seal on the radiator filler cap. original equipment manufacturers. The cylinder head gasket, their  failures tend to be other towards the cam area.Troubleshooting, IF it isn't a severe case: We warm up the engine, pull in the shop,  put 10-15 psi on the radiator/cooling system, drain the hot oil out, pull the oil pan off. Check for indications of coolant leakage from the water pump seal. Cooling System Conditioner contains alkali. After the engine cools, carefully loosen the filler cap. 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Dorr, Michigan Engine Make Caterpillar. The trouble shot that Cat guy has is spot on. Heat water in a pan until the temperature of the water is 98°C (208°F). The first engine had a ECM on it like a 3046 PEEC. Oil cooler or injector cups would be my hope. Check the gauge for the exact pressure that is required to open the filler cap. when the dipstick was pulled. Cat water pumps are built to extremely tight metal-to-metal clearances, manufactured for peak system efficiency, and tested to match stringent performance and endurance requirements. Any contact can cause severe burns. All names, descriptions, numbers and symbols are used for reference purposes only. Install one of the following thermometers: Any temperature indicator of known accuracy can also be used to make this check. Look for bent core fins between the folded cores of the radiator. You could not get to the boost sensor witch was stuck in the ECM and it was down low with a hose running from the air intake to it and water would from in it and steel in the sensor which was lower. I'll second the water pump ours has had at least 2 in 800,000 miles. It's a weep hole, telling you that the seal has gone. Install the 6V-7775 Air Pressure Gauge in the port and measure the pump pressure. A pressure type cooling system helps prevent cavitation in the water pump. Water pump, cheapest thing to check and fix. To check for the amount of pressure that is required to open the filler cap, use the following procedure: Carefully inspect the filler cap. Water pump outlet pressure can be checked on water manifold assembly (3) next to coolant temperature sensor (2). 1. water pump weep hole is plugged = thus the failed water pump seal is now pushing coolant into the weep hole area, BUT it can't leak externally(=plugged with grud), thus it pushs on the oil seal, and pushs coolant into the geartrain area and you get coolant in the oil. Note: Leaks at the weep hole or at the water pump gasket are typically caused by contaminated coolant (or dirty coolant). When working on an engine that is running, avoid contact with hot parts and rotating parts. When a diagnosis is made of a cooling system problem, both the temperature and the pressure must be checked. At 9000 miles, I notice a small loss of oil pressure. This chart demonstrates the effect of pressure on the boiling point (steam) of water. If the cause of the leak is not determined, repairing the leakage may not resolve the problem. Use a piece of wire to suspend the water temperature regulator in the pan of hot water. Weep hole on the water pump is dry. Refer to the Specifications, "Water Temperature Regulator" for more information about the minimum distance for openings on the water temperature regulator. Remove the plugs (1). This engine has a pressure type cooling system. So you need a new fuel pump. Note: If the weep hole becomes obstructed, then coolant may be forced past the water pump's gasket into the crankcase. Engine Model C12. Slowly remove the pressure cap. Inspect the following components for any foreign substances: Remove any deposits that are found on these items, and remove any material that is found on these items.