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Unusally coolant leak 2001 frontier


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AJ Frontier
New User

Sep 18, 2009, 2:26 PM

Post #1 of 2 (1141 views)
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Unusally coolant leak 2001 frontier Sign In

I have a 2001 Nissan Frontier 4x4 3.3 V6 108000mi and it has a very unusually coolant leak. It only leaks after the engine has shut off - but not every time. It appears that the coolant is coming from the weep hole at the water pump (not 100% on this). I realize that if coolant is coming from the weep hole then a seal has failed, but what I don't understand is why it isn't consistent?

A few weeks back I had a new radiator put in becuase I was having over heating issues. Once the new radiator was in the over heating disappeared. Then two weeks later I suddenly have a huge coolant leak. Would there be any connection here?

I also replaced the radiator cap (the old one was faulty) in hopes that would fix the problem, but not sure if it has yet. As of this morning I have had no leaking.

The Water Pump was replaced at 90,000 miles when I had the timing belt replaced so it seems like a failed seal is unlikely unless the radiator replacement would somehow cause a seal to fail.

Anyone have any thoughts on this? I really don't want to replace a water pump and if anyone knows of any other things that would cause coolant to leak only after the engine is shut off I would greatly appreciate it.

Thanks


Tom Greenleaf
Ultimate Carjunky / Moderator


Sep 18, 2009, 6:31 PM

Post #2 of 2 (1123 views)
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Re: Unusally coolant leak 2001 frontier [In reply to] Sign In

A seal on anything with a shaft like a water pump is a strain on them. WPs need seal for vacuum and the pressures of the cap which dictates.

If you see so much as a smidgen of coolant or traces from a vent hole in a water pump it's no good and needs to go - again which stinks but it really won't heal,

T
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Long retired now




Unusally coolant leak 2001 frontier


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