# Coolant leak 2001 Nissan Sentra **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [August 12, 2007, 4:24pm UTC](https://community.cartalk.com/t/coolant-leak-2001-nissan-sentra/2991 "2007-08-12T16:24:34Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Robin\_Young](https://avatars.discourse-cdn.com/v4/letter/r/df705f/32.png) [@Robin\_Young](https://community.cartalk.com/u/Robin_Young)\ **Post date:** [August 12, 2007, 4:24pm UTC](https://community.cartalk.com/t/coolant-leak-2001-nissan-sentra/2991/1 "2007-08-12T16:24:34Z")
I’m having trouble with overheating. I think I’ve had a coolant leak for sometime - as the reservoir empties out. I had the radiator replaced last year about this time. I took it to the shop last time and they added coolant everywhere but said they couldn’t find the leak. When the temp gauge went up this time I bought pre mixed coolant and filled the reservoir - also filled the radiator. Now I see a lot of green fluid coming out from under the car, after driving a few miles and running the AC. Did I mess it up by adding too much to the radiator? Thanks for any info. ---
**Author:** ![BustedKnuckles](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bustedknuckles/32/25_2.png) [@BustedKnuckles](https://community.cartalk.com/u/BustedKnuckles)\ **Post date:** [August 12, 2007, 4:39pm UTC](https://community.cartalk.com/t/coolant-leak-2001-nissan-sentra/2991/2 "2007-08-12T16:39:49Z")
It should be easy to find the leak now. Check under the hood. If the coolant is not coming out of the overflow tube of the reservior, then you have a leak somewhere. This is probably the leak that is causing all the problems. ---
**Author:** ![AlanY](https://avatars.discourse-cdn.com/v4/letter/a/f4b2a3/32.png) [@AlanY](https://community.cartalk.com/u/AlanY)\ **Post date:** [August 13, 2007, 6:43am UTC](https://community.cartalk.com/t/coolant-leak-2001-nissan-sentra/2991/3 "2007-08-13T06:43:32Z")
> Did I mess it up by adding too much to the radiator? > No. Normally the radiator is full with any excess from heat expansion going to the plastic reservoir. So it is impossible to overfill the radiator and cause any harm in a properly operating cooling system. If you have an external leak, you (or your mechanic) will have to visually track it down to its source and repair accordingly. ---
**Author:** ![Robin\_Young](https://avatars.discourse-cdn.com/v4/letter/r/df705f/32.png) [@Robin\_Young](https://community.cartalk.com/u/Robin_Young)\ **Post date:** [August 13, 2007, 11:04pm UTC](https://community.cartalk.com/t/coolant-leak-2001-nissan-sentra/2991/4 "2007-08-13T23:04:57Z")
Thank you for the information! I took it in today and apparently the radiator is leaking - and the hoses need replacing. Luckily the radiator is still under warranty. I’m glad I found your site. It’s very helpful!