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Old 02-01-2008, 09:46 PM   #1
Plays_With_toys
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1996 Legacy L wagon

Default Anyone had their water pump seal fail?

I have a coolant leak. At first I thought maybe heater core, because I didn't see any puddles and I could smell coolant. Then one day I found a puddle. So I look underneath, and the lower radiator hose looked.... well hosed. So I bought new hoses and a new thermostat and threw those all on there with some fresh coolant. But the leak still prevails. The leak is trailing down from the water pump area down the oil pan and onto my exhaust manifold. Most of it burns off (hence the lack of puddle).

Now I stupidly did the timing belt without replacing the water pump as I didn't have the money, and it looks like I'll be going in to do another timing belt job and replace the water pump. Some people threw out the suggestion of the coolant coming out of the weep hole on the pump. My new thermostat did not have the little float valve like the subaru one did. I've read that one should either get a genuine suby thermostat, or drill a small hole in the cheaper thermostats, but I don't see why this would cause a leak.

Unless any of you can explain another reason why it may be leaking around there? No overheating issues (except when I actually ran low on coolant, but even then it never got hot, just noticed the needle moving up while at a light), and good bright green coolant. No white smoke out the tail pipe either.
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Old 02-02-2008, 03:15 PM   #2
RaceFaceXC
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clean your engine real good around the water pump, pop the hood, run it and watch for the leak.. you should be able to pinpoint the location where the coolant actually gets out of the system that way and then know which gasket/part to replace if necessary. You might need to wait for it to get warm enough for the thermostat to open if that is causing the problem somehow, but otherwise as soon as the pump impeller starts spinning and producing pressure you should be able to see where its leaking. good luck.
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Old 02-02-2008, 03:16 PM   #3
RaceFaceXC
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fyi - some mineral spirits or engine cleaner in a spray bottle usually does the trick.. soak it with cleaner/mineral spirits let it sit for a couple mins and then rinse with water. if you have any heavy gunk built up, scrape it off first as it wont just wash away with cleaner and water.
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Old 02-11-2008, 07:08 PM   #4
keihacker
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I had a similar issue. since it was time for a new timing belt anyway...I replaced the water pump and seals along with the belt. The kit I bought included the belt, pulleys and a new water pump.
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Old 02-12-2008, 02:01 PM   #5
michael53
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Default Just a drip

That seems to be a trap to do the belt and not the pump. I did it too and got caught a few months later but mine was only a drip from the teltale . Also those non gen thermostats sometimes do not open properly and I would get rid of it if I were you .Michael
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Old 02-12-2008, 08:11 PM   #6
Plays_With_toys
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Forgot to update this. Turns out it was way more serious. The top most bolt was completed unthreaded and about to fall out. The next one counter clockwise was threaded, but gave no resistance to finger loosening. The next one was snug only to my fingers. The bottom 3 required a ratchet, but hardly any force. So as the timing belt pushed down on the water pump, it was leaking from behind. All is good now though.
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Old 02-12-2008, 11:24 PM   #7
RaceFaceXC
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Quote:
Originally Posted by Plays_With_toys View Post
Forgot to update this. Turns out it was way more serious. The top most bolt was completed unthreaded and about to fall out. The next one counter clockwise was threaded, but gave no resistance to finger loosening. The next one was snug only to my fingers. The bottom 3 required a ratchet, but hardly any force. So as the timing belt pushed down on the water pump, it was leaking from behind. All is good now though.
did you have to helicoil your block to replace the threads that were damaged? Or was it just short of being tight?
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Old 02-13-2008, 12:42 AM   #8
Plays_With_toys
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No the threads were fine. The top 3 screws had simply backed out. And with the timing belt pushing down onto the water pump for tension, the waterpump was pulling at the top away from the block creating a leak.
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Old 02-13-2008, 08:45 PM   #9
RaceFaceXC
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i see, all makes sense now. my little peanut brain needs all the info sometimes.
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