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89 GL coolant leak

I discovered a small puddle of coolant underneath the front area of the block. The puddle appears infrequently and the coolant overflow level drops slowly. I had my garage conduct a pressure test and no leaks were observed. The temperature gauge is at a normal level while driving. The car has

125,000 miles on it. Any info on why this is happening would be greatly appreciated. Also I am considering using Bars Stop Leak to hopefully stop the coolant leak.
Reply to
Doug
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water pump?

try to clean off the underside and pinpoint where the coolant is coming from

Carl

Reply to
Carl 1 Lucky Texan

Are you sure it is a leak? I just sold my '97 OBW and the buyer's mechanic said I had a small radiator leak, which was a surprise to me. He showed me a small pool of liquid on the support beam right under the radiator. I followed a path of liquid up the side of the radiator to the top, where it was also wet, and this area was right next to the very small overflow hole in the front side of the coolant reservoir. We had near record heat that day and the coolant had expanded and a small amount of coolant had overflowed from the reservoir. No leak..

-- Vic Roberts Replace xxx with vdr in e-mail address.

Reply to
Victor Roberts

block. The puddle appears infrequently and the coolant overflow > level drops slowly.

Hi,

Is it the original water pump? Around 100k-125k miles is where I've experienced the most leaks starting, and often they're intermittent at first as the seal weakens but hasn't failed completely.

As the other guys said, do some detective work to see where it's coming from to be sure: replacing a water pump's enough work you don't want to be doing it just for diagnostics!

Rick

Reply to
Rick Courtright

The water pump was replaced around 20,000 miles ago. During the last leak occurrence I observed a small drop coming out from a cover plate on the front of the block. Not sure, but this might be where the timing belts are. I don't know if this matters but the leaks (that I observed) occurred when the temperature was very high. I drove the car 40 miles today with a couple of stops and observed no leaks. The reservoir had a noticeable drop in coolant while the radiator was full when checked this afternoon.

Reply to
Doug

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