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ATTENTION Pump Sure Or Extremely Every

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ATTENTION Pump Sure Or Extremely Every TOYOTA TOYOTA TOYOTA TOYOTA TOYOTA TOYOTA TOYOTA TOYOTA TOYOTA TOYOTA TOYOTA TOYOTA TOYOTA ATTENTION COOLING SYSTEM AND BELTS MAINTENANCE A. COOLING SYSTEM 2. Flushing should always be done B. BELTS 1. Be sure that the engine is cool BEFORE replacing many cooling 1. Belt tension should be adjusted NISSAN NISSAN NISSAN NISSAN NISSAN NISSAN NISSAN NISSAN NISSAN NISSAN NISSAN NISSAN NISSAN before removing radiator cap for system components, especially the using a proper tension guage during service. NEVER add cold coolant to water pump, so that contaminants regular service intervals. This will an extremely hot engine as thermal do not circulate and damage the limit play and possible belt slippage. shock can damage many internal new components. Overtightening must be avoided as it MITSUBISHI MITSUBISHI MITSUBISHI MITSUBISHI MITSUBISHI MITSUBISHI MITSUBISHI MITSUBISHI MITSUBISHI MITSUBISHI MITSUBISHI MITSUBISHI MITSUBISHI engine components, including the reduces belt life and places excessive water pump seal. strain on the water pump bearing. NEW WATER PUMP INSTALLATION ISUZU ISUZU ISUZU ISUZU ISUZU ISUZU ISUZU ISUZU ISUZU ISUZU ISUZU ISUZU ISUZU The water pump is the heart of the of any special bolt or fastener. equipped), fan, fan belts, and re- cooling system. It provides constant 6. Clean out any built sediment and connect all hoses. (Be sure the belts circulation of the coolant through the scale from impeller cavity in engine and pulleys are not offset.) internal engine passages and through block. 7. Fill radiator with a correct mixture of the radiator. This helps provide even 7. Remove all gasket material from fresh antifreeze and water and check HONDA HONDA HONDA HONDA HONDA HONDA HONDA HONDA HONDA HONDA HONDA HONDA HONDA temperature throughout the engine, mounting surfaces on engine. for leaks. eliminating damaging hot spots. New 8. Tighten fan belts to factory water pump installation should follow B. INSTALLING recommended tension. Tension the specific instructions provided NEW WATER PUMP can be checked with commercially with every NPW New Water Pump. 1. If water pump equipped with a steel available testers or by measuring fan MAZDA MAZDA MAZDA MAZDA MAZDA MAZDA MAZDA MAZDA MAZDA MAZDA MAZDA MAZDA MAZDA Following is a general list of steps to back plate covering the impeller, belt defection as specified in factory be observed for proper installation and check all mounting bolts and tighten service manual. water pump life. as required. 9. Install radiator cap and run engine 2. Coat both side of new gasket with until normal operating temperature A. BEFORE INSTALLING tacky sealer and position on new is reached and check for leaks. DAIHATSU DAIHATSU DAIHATSU DAIHATSU DAIHATSU DAIHATSU DAIHATSU DAIHATSU DAIHATSU DAIHATSU DAIHATSU DAIHATSU DAIHATSU NEW WATER PUMP water pump or engine block. NOTE: A small, temporary seepage 1. If the old pump will still circulate NOTE: If using a self-curing, sillicone of coolant from the “weep hole” coolant through the engine, clean type gasket sealer from a tube, do located on the lower side of the shaft cooling system with a chemical not apply excessive amount. Excess housing may occur during initial run- cleaner and reverse flush all may be squeezed out into water inperiod. This should stop after the sediment, rust and scale before pump and plug up cooling passages. seal has been allowerd to “lap in”. SUZUKI SUZUKI SUZUKI SUZUKI SUZUKI SUZUKI SUZUKI SUZUKI SUZUKI SUZUKI SUZUKI SUZUKI SUZUKI removing old pump. 3. Install new water pump on engine 10. After operating temperature has 2. Drain coolant from radiator and block-DO NOT FORCE PUMP ON BY been reached, shut off engine engine block. STRIKING END OF SHAFT. and allow to cool-NEVER REMOVE 3. Disconnect all hoses from old water 4. Tighten mounting bolts gradually RADIATOR CAP WHILE ENGINE IS pump and fan belts riding on pulley and evenly in a staggered sequence HOT. SUBARU SUBARU SUBARU SUBARU SUBARU SUBARU SUBARU SUBARU SUBARU SUBARU SUBARU SUBARU SUBARU connected to water pump. to vehicle manufacturer's torque 11. Remove radiator cap (only after 4. Remove fan, fan clutch (if equipped) speficications. engine has cooled) and top off and pulley from old water pump. 5. Turn pump shaft by hand to make radiator with additional antifreeze 5. Remove old water pump from sure it rotates freely. and water mixture. engine block making note of location 6. Re-install pulley, fan clutch (if HINO HINO HINO HINO HINO HINO HINO HINO HINO HINO HINO HINO HINO FAN CLUTCH INSPECTION AND REPLACEMENT FOREIGN FOREIGN FOREIGN FOREIGN FOREIGN FOREIGN FOREIGN FOREIGN FOREIGN FOREIGN FOREIGN FOREIGN FOREIGN VEHICLES VEHICLES VEHICLES VEHICLES VEHICLES VEHICLES VEHICLES VEHICLES VEHICLES VEHICLES VEHICLES VEHICLES VEHICLES A fan or fan clutch can be imbalanced 3. Remove the fan assembly from the new fan clutch using the new bolts by broken or missing components and fan clutch. Most fans are stamped provided. DO NOT REUSE OLD BOLTS. quickly ruin a newly installed pump. “FRONT” to indicate position in Tighten to 15-20 ft/lbs. torque. Before installing a new water pump relation to the front of the vehicle. 2. Mount the new fan clutch to the always take time for a careful inspection However, to ensure proper re- water pump reusing the original REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS of the fan/fan clutch. installation, be sure to note fan bolts and lockwashers. Tighten bolts position before removal. to 20 - 25 ft/lbs torque. A. BEFORE INSTALLING 4. Carefully inspect the fan blades and 3. Tighten fan belts to factory NEW FAN CLUTCH replace if there are cracks, broken recommended tension. Tension 1. Loosen the tension of all belts riding welds, loose rivets, or if blades are can be checked with commercially on the water pump pulley. bent, broken or missing. available testers or by measuring the 2. Remove the four bolts or nuts fan belt deflection as specified in the Attention Attention Attention Attention Attention Attention Attention Attention Attention Attention Attention Attention Attention attaching the fan clutch to the water B. INSTALL NEW FAN CLUTCH factory service manual. pump pulley. 1. Install the fan assembly onto the 168 TOYOTA TOYOTA TOYOTA TOYOTA ATTENTIONTOYOTA TOYOTA TOYOTA TOYOTA TOYOTA TOYOTA TOYOTA TOYOTA TOYOTA WATER PUMP/FAN CLUTCH FAILURE AND THEIR CAUSES A. FAILURE SYMPTOM: B.FAILURE SYMPTOM: D.FAILURE SYMPTOM: NISSAN NISSAN NISSAN SealNISSAN LeakageNISSAN - Dirty NISSAN ShaftNISSAN BreakageNISSAN NISSAN NISSAN Seal Leakage-CleanNISSAN NISSAN NISSAN System System MITSUBISHI MITSUBISHI MITSUBISHI MITSUBISHI MITSUBISHI MITSUBISHI MITSUBISHI MITSUBISHI MITSUBISHI MITSUBISHI MITSUBISHI MITSUBISHI MITSUBISHI ISUZU ISUZU ISUZU ISUZU ISUZU ISUZU ISUZU ISUZU ISUZU ISUZU ISUZU ISUZU ISUZU Fig. 5. Adding cold coolant to a hot system can crack a ceramic seat. Leakage was observed from this Fig.3.Clean break indicates an pump which had just recently HONDA HONDA HONDA Fig. 1. EvidenceHONDA of seal leakageHONDA from HONDA “instantaneous”HONDA fractureHONDA caused byHONDA beenHONDA installedHONDA in a fairly HONDA clean HONDA weep hole. sudden overload or imbalance. coolant system. This pump had been in service only CAUSE OF FAILURE: CAUSE OF FAILURE: a short time before rustly-looking Bearing Overload Thermal Shock MAZDA MAZDA MAZDA coolantMAZDA began to leakMAZDA out of theMAZDA MAZDA MAZDA MAZDA MAZDA MAZDA MAZDA MAZDA weep hole leaving behind large This bearing failed as the result The seal damage had come from deposits of rust and calcium. Fig. of a sudden overload caused by thermal shock, typically caused 2 shows a builtup of rust particles vibration or imbalance. by adding cold coolant to an with a mud-like consistency within overheated engine. DAIHATSU DAIHATSU DAIHATSU the pump.DAIHATSU DAIHATSU DAIHATSU DAIHATSU DAIHATSU DAIHATSU NOTE:DAIHATSU Allow anDAIHATSU overheated engineDAIHATSU DAIHATSU to sit and cool before adding CAUSES OF FAILURE: coolant. Cooling System Contamination C. FAILURE SYMPTOM: E. FAILURE SYMPTOM: SUZUKI SUZUKI SUZUKI SUZUKI SUZUKI SUZUKI CastingSUZUKI BreakageSUZUKI SUZUKI SUZUKI Dirty FanSUZUKI Clutch SUZUKI SUZUKI SUBARU SUBARU SUBARU SUBARU SUBARU SUBARU SUBARU SUBARU SUBARU SUBARU SUBARU SUBARU SUBARU Fig. 6. A worn fan clutch rob power by HINO HINO HINO HINO HINO HINO HINO HINO HINO remainingHINO fully engaged.HINO HINO HINO Fig. 2. Built-up contaminants quickly wear seal. When the silicon fluid leaks from the fan clutch it will appear The abrasiveness of the particles as streaks which often collect FOREIGN FOREIGN FOREIGN FOREIGN FOREIGN FOREIGN FOREIGN FOREIGN FOREIGN FOREIGN FOREIGN FOREIGN FOREIGN VEHICLES VEHICLES VEHICLES VEHICLES VEHICLES VEHICLES VEHICLES VEHICLES VEHICLES VEHICLES VEHICLES VEHICLES VEHICLES found in a badly contaminated dirt across the face of the unit. system will prematurely wear Fig. 4. Excessive vibration shattered this Driver may notice either loss of the water pump seal. Harmful casting. horsepower and fuel economy, or contamination is common in hotter running, overheating engine. systems that are not properly REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS REFERENCE CROSS maintained. A system that is not CAUSE OF FAILURE: CAUSE OF FAILURE: properly pressurerized will allow air to enter and promote the builtup Excessive Vibration Component Wear of rust. If water with a high mineral Casting failure is normally Service life of the OE fan clutch is content is added to the system associated with heavy vibration or usually shorter than the vehicle's and is heated, it will begin to form imbalance which can be caused by service life. After three or four years Attention Attention Attention depositsAttention that will accumulateAttention andAttention a looseAttention fan or pulleyAttention assembly,Attention or failureAttention or wear mayAttention be expected.Attention Attention cause passage restrictions and may by worn fan clutch. NOTE: Inspect frequently and damage the seal.
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