# 2000 Pathfinder Waterfalls?

**URL:** <https://community.cartalk.com/t/2000-pathfinder-waterfalls/66409>\
**Category:** Maintenance/Repairs\
**Tags:** pathfinder, gaskets, coolant\
**Created:** [July 20, 2011, 6:55am UTC](https://community.cartalk.com/t/2000-pathfinder-waterfalls/66409 "2011-07-20T06:55:18Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![livemeyer](https://avatars.discourse-cdn.com/v4/letter/l/f4b2a3/32.png) [@livemeyer](https://community.cartalk.com/u/livemeyer)\
**Post date:** [July 20, 2011, 6:55am UTC](https://community.cartalk.com/t/2000-pathfinder-waterfalls/66409/1 "2011-07-20T06:55:18Z")

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I recently bought a clunker of a Nissan Pathfinder, 2000 model year with 150,000 miles. Needs a bit of work here and there, but a complete, running truck for $1500 was a good deal. But about the engine: apparently between 148k and 149k the head gasket blew due to low coolant, and was repaired. Now, I didn’t notice this on my first test drive, but I did a few days ago when I drove it and now own it: I gunned it hard to get into traffic and I heard a sudden whooshing sound, like water was rushing around in the engine or heater core. This is a bit of a surprise as there doesn’t seem to be a coolant leak, and the temperature gauge is at normal. Is it a concern?

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**Author:** ![mcparadise](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mcparadise/32/32_2.png) [@mcparadise](https://community.cartalk.com/u/mcparadise)\
**Post date:** [July 20, 2011, 12:43pm UTC](https://community.cartalk.com/t/2000-pathfinder-waterfalls/66409/2 "2011-07-20T12:43:39Z")

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Yes, it’s a concern. It probably means there’s an air pocket in the cooling system. This air must be bled out of the system. There should be no air, only coolant.

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**Author:** ![SteveF](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/stevef/32/2_2.png) [@SteveF](https://community.cartalk.com/u/SteveF)\
**Post date:** [July 20, 2011, 12:59pm UTC](https://community.cartalk.com/t/2000-pathfinder-waterfalls/66409/3 "2011-07-20T12:59:46Z")

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If indeed the problem is merely air in the cooling system, consider yourself fortunate. This a trivial problem, easily corrected. Good luck with your Nissan.

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**Author:** ![livemeyer](https://avatars.discourse-cdn.com/v4/letter/l/f4b2a3/32.png) [@livemeyer](https://community.cartalk.com/u/livemeyer)\
**Post date:** [July 25, 2011, 7:17am UTC](https://community.cartalk.com/t/2000-pathfinder-waterfalls/66409/4 "2011-07-25T07:17:14Z")

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So, a coolant flush, or ?? I have never heard of “bleeding” the air out of a coolant system, as would be done with hydraulic brake lines. I have been driving it the past few (summer) weeks with no indications of overheating, so maybe it is something that will go away on it’s own?

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**Author:** ![PvtPublic](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/pvtpublic/32/13089_2.png) [@PvtPublic](https://community.cartalk.com/u/PvtPublic)\
**Post date:** [July 25, 2011, 8:00am UTC](https://community.cartalk.com/t/2000-pathfinder-waterfalls/66409/5 "2011-07-25T08:00:07Z")

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If you have been using the AC it could just be a clogged evaporator drain,causing water to collect in the evaporator housing.