Since October my mechanic has changed the timing cover gasket, timing chain, water pump, and the coolant bottle. He has pressure tested it twice and put Ultraviolet dye into the coolant trying to find out where it could be leaking from. When he replaced the coolant bottle I believe he put too much in because it was on the ground and it looked like it had sprayed all over the engine around the top of the bottle. He cleaned the engine and put a new radiator cap on and I haven't seen any coolant on the ground but now it seems to be evaporating. The coolant level keeps getting lower and lower pretty quickly, but there isn't any on the ground and there isn't any sign of a leak around the bottle like before. I'm very worried that it's the head gasket but he said that it would be overheating if that was the case and it hasn't done that at all.
SOURCE: coolant leaking even after installatin of new water pump
Any fluid leak can be hard to locate even if you have the vehicle in the air.
Assuming you mean you have just changed into a new water pump, and assuming the new water pump has the correct gasket and sealant applied correctly, and that the new water pump is not defective from the factory.....I'd say start examining the radiator for very-very small pin holes (not easily seen many times) also check your hoses for the same problem.
Other then that, if you had a reputable garage replace the water pump, take it back to them and tell them the new problem started after they worked on it. Could be they didn't do a good job from the start.
Without seeing yoru car, knowing what it is, it's rather difficult to hellp you find the leak, I wish I had more too tell you.
Hope this helped at least some.
Terry
SOURCE: been seen by mechanic who says radiator, gasket
any white smoke coming from exaust? sounds like a head gasket
It is very rare a water pump gasket with cause trouble though sometimes the shaft seal will leak and sometimes the seal remains good while the bearing becomes noisy and rough and eventually breaks altogether, often with very expensive results. Sometimes both things happen at the same time.
When a car gives a warning something is happening it isn't wise to ignore it...
Most cars will need at least one replacement water pump during its lifetime. The same can be said of the cylinder head gasket which starts to deteriorate the very first time the engine is started and the speed of decay will depend on lots of variables, not the least of how many cold starts and warm-up cycles the engine has had.
A neglected coolant leak of any sort is likely to hasten the end of the head gasket. A seriously overheated engine though probably will never be the same again even though it is likely to cost a small fortune to repair.
These days even a relatively straightforward head gasket job costs so much it is the reason otherwise perfectly good cars are being scrapped early.
Replacing a head gasket on a modern engine requires precision work if it is to have a similar lifespan to the original and precision work doesn't come cheap.
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