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After replacing my water pump, I have noticed a very slight amount of coolant leaking from the area right beside the fuel pump. It's not even enough to drip to the ground, but it's there and that bothers me. It looks like it's coming from between the timing cover and the block??? I know that sounds crazy, but....could it be? Since the leak is so slight, I wonder if a coolant stop-leak additive would work. Anybody ever used that stuff? Does it impair the cooling efficiency? Please help!! Thanks.....

66 Pony Coupe, auto, 289
 

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Yes it could leak there, Get some "bars leak" and that should plug it up. Especialy if it's not dripping. I have used it many times and it works pretty good and I don't think it effects cooling in anyway. I think Bars leak is now called "Prestone stop leak" or somthing close to that. good luck

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I hate to say this but it sounds like you are going to have to take the pump back off..it's leaking from somewhere around the gasket

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I do not like using anything like that as there are some small holes in head gaskets that could get plugged. Hate to say it but the best fix is to remove and reinstall the water pump.

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I wouldn't use any quick leak fix if I were you. They tend to coat the whole inside of your cooling system, block, heads, intake, radiator, etc. Machinist hate working on motors with BarsLeak because it's such a mess to clean up.

Try tightening the closest few bolts. If that doesn't work, pull the pump and or timing chain cover and replace the gasket.

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I agree with the others to replace the gasket. I used stop leak once many years ago in my '72 Charger. It did a real nice job of stopping the leak in the radiator. It also stopped the water pump, the thermostat and made sure I'd never have a leak in the heater core as well (since water could no longer go through it). I still got to fix the leak correctly, but also had to replace the entire cooling system with it ... better to just do it right the first time.

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