I recently changed the timing belt and pulleys on my car. Was advised to change the water pump while in there although didn't have any problems with it. I have had 3 waterpumps start dripping through the weep hole about 10 days from replacement almost to the day on each one. Car does not overheat and runs smooth except for the antifreeze dripping from the weep hole. All pulleys look smooth and visually spin true. Prior to changing the first water pump and timing belt, I did have, about two weeks prior,a radiator cap fail and all coolant evaporated out causing engine to overheat. Replaced cap and everything ran fine until I did the timing belt maintenance repairs. Is it possible that the thermostat is the problem and the waterpump is running dry? Im not overheating though. Could I have a blockage? I diluted my own anifreeze 50/50 and it is possible that bad antifreeze could cause the bearing to fail? I needs some ideas to try.
HI Clark
You didnt mention type of car and engine but I will try for to look at the alignment of the pulley on the waterpump and relation to the other pulleys it could be there is a stress factor put on these water pumps to fail as you say. One must find the cause,, would you have the orignal pump to match it up with the rebuilt ones? you may endup going to a dealer and borrow to match up with the ones they keep putting on from the same supplier.Make sure you have no vibration coming from all these pulleys they seem of replaced something is out of tune to blow those seals in a water pump they are doubled sealed.Or are you getting new ones?..... missing info no problem I wouldve love to tackle this problem when I was in the trade.;)
Joe
Joe
98 toyota Camry 4 cyl. I thought about that alignment issue and I cant see any way to adjust it. Everything appears to be aligned based on what I can see. I am doing the repairs myself by the way. I have started the engine after replacing the timing belt and also the other two water pumps and observed the timing belt that goes around the water pump pulley and it seems smooth and without any type of problems. The tensoner is spring loaded and once it is tight by the spring, it is necessary to tighten the bolt on the pulley to then keep it in place. The belt does not feel very tight so I dont think a tight belt is the problem. I am also doing a radiator flush and getting a new thermostat to make sure I have free flow of fluid to cool the seal. I wonder if I have some "dead" antifreeze that just spins and gets hot and burns the seal. When I take off the bad pumps, the shaft and bearings seem tight to the hand touch. Any other Ideas?
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Are you bleeding the air out of the cooling system, you must do that or it will get air pockets and overheat.
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98 toyota Camry 4 cyl. I thought about that alignment issue and I cant see any way to adjust it. Everything appears to be aligned based on what I can see. I am doing the repairs myself by the way. I have started the engine after replacing the timing belt and also the other two water pumps and observed the timing belt that goes around the water pump pulley and it seems smooth and without any type of problems. The tensoner is spring loaded and once it is tight by the spring, it is necessary to tighten the bolt on the pulley to then keep it in place. The belt does not feel very tight so I dont think a tight belt is the problem. I am also doing a radiator flush and getting a new thermostat to make sure I have free flow of fluid to cool the seal. I wonder if I have some "dead" antifreeze that just spins and gets hot and burns the seal. When I take off the bad pumps, the shaft and bearings seem tight to the hand touch. Any other Ideas?
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