# 03 Altima heating/cooling issue **URL:** \ **Category:** General Discussion\ **Tags:** nissan, altima\ **Created:** [February 26, 2021, 3:27am UTC](https://community.cartalk.com/t/03-altima-heating-cooling-issue/175444 "2021-02-26T03:27:34Z")\ **Posts on this page:** 14\ **Page:** 1
**Author:** ![scottadams650\_166242](https://avatars.discourse-cdn.com/v4/letter/s/3ec8ea/32.png) [@scottadams650\_166242](https://community.cartalk.com/u/scottadams650_166242)\ **Post date:** [February 26, 2021, 3:27am UTC](https://community.cartalk.com/t/03-altima-heating-cooling-issue/175444/1 "2021-02-26T03:27:34Z")
Hello fellow car community. So I replaced both the upper & lower thermostats in the car 2 weeks ago,everything was great for a week. Ok par for the course I thought as I watched coolant leaking from the water pump. Changed out the water pump but now im not gtting any heat when running the heater & the lower radiator hose is cool to the touch(same issue it had before changing thermostats). Is it possible that the thermostats went bad in that time frame.? Could they be damaged if overheated? ---
**Author:** ![wolyrobb](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/wolyrobb/32/45497_2.png) [@wolyrobb](https://community.cartalk.com/u/wolyrobb)\ **Post date:** [February 26, 2021, 3:38am UTC](https://community.cartalk.com/t/03-altima-heating-cooling-issue/175444/2 "2021-02-26T03:38:17Z")
You may have air trapped in the system, either from a bad radiator cap or other sources, Seems to be a common complaint on this vintage of Altima. ---
**Author:** ![scottadams650\_166242](https://avatars.discourse-cdn.com/v4/letter/s/3ec8ea/32.png) [@scottadams650\_166242](https://community.cartalk.com/u/scottadams650_166242)\ **Post date:** [February 26, 2021, 4:05am UTC](https://community.cartalk.com/t/03-altima-heating-cooling-issue/175444/3 "2021-02-26T04:05:20Z")
Thank you Wollyrob. Next question , how do I go about removing the air from system? I know back in the day we would just park the vehicle with the front of vehicle uphill & it would force all the air to the top of radiator. With these imports & computer controlled vehicles I have no idea how to get the air out. ![](https://global.discourse-cdn.com/cartalk/original/2X/6/602d295699c664ee41f5e74eb1e2b9d202636f1e.png) > ![](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/wolyrobb/45/4524_2.png "wolyrobb") | [wolyrobb](https://community.cartalk.com/u/wolyrobb) > February 26 | > > - | - | You may have air trapped in the system, either from a bad radiator cap or other sources, Seems to be a common complaint on this vintage of Altima. ---
**Author:** ![wolyrobb](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/wolyrobb/32/45497_2.png) [@wolyrobb](https://community.cartalk.com/u/wolyrobb)\ **Post date:** [February 26, 2021, 4:10am UTC](https://community.cartalk.com/t/03-altima-heating-cooling-issue/175444/4 "2021-02-26T04:10:32Z")
It sounds like your method would still work from what I’m reading. May not get all the air out but it’s worth a try. ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [February 26, 2021, 5:15am UTC](https://community.cartalk.com/t/03-altima-heating-cooling-issue/175444/5 "2021-02-26T05:15:31Z")
> [@scottadams650\_166242](#): > > the lower radiator hose is cool to the touch(same issue it had before changing thermostats). After how many miles of driving? The lower hose will be cool if the vehicle is parked and idling. > [@scottadams650\_166242](#): > > how do I go about removing the air from system? The water pump will force coolant through the heater core, operate the engine at 2500 RPMs for 30 seconds, then refill the cooling system. ---
**Author:** ![scottadams650\_166242](https://avatars.discourse-cdn.com/v4/letter/s/3ec8ea/32.png) [@scottadams650\_166242](https://community.cartalk.com/u/scottadams650_166242)\ **Post date:** [February 26, 2021, 6:23pm UTC](https://community.cartalk.com/t/03-altima-heating-cooling-issue/175444/6 "2021-02-26T18:23:08Z")
Thanks.gonna give that a try now. ![](https://global.discourse-cdn.com/cartalk/original/2X/6/602d295699c664ee41f5e74eb1e2b9d202636f1e.png) > ![](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/45/2249_2.png "Nevada\_545") | [Nevada\_545](https://community.cartalk.com/u/nevada_545) > February 26 | > > - | - | > ![](https://global.discourse-cdn.com/cartalk/original/3X/a/2/a21b608d487204ae8a88d6938b925cf0ac93a854.png)scottadams650\_166242: > > the lower radiator hose is cool to the touch(same issue it had before changing thermostats). After how many miles of driving? The lower hose will be cool if the vehicle is parked and idling. > ![](https://global.discourse-cdn.com/cartalk/original/3X/a/2/a21b608d487204ae8a88d6938b925cf0ac93a854.png)scottadams650\_166242: > > how do I go about removing the air from system? The water pump will force coolant through the heater core, operate the engine at 2500 RPMs for 30 seconds, then refill the cooling system. ---
**Author:** ![scottadams650\_166242](https://avatars.discourse-cdn.com/v4/letter/s/3ec8ea/32.png) [@scottadams650\_166242](https://community.cartalk.com/u/scottadams650_166242)\ **Post date:** [February 26, 2021, 6:48pm UTC](https://community.cartalk.com/t/03-altima-heating-cooling-issue/175444/7 "2021-02-26T18:48:55Z")
I only drove it a couple of miles,because i was worried about causing damage cause there was no heat coming from heater. ---
**Author:** ![shanonia](https://avatars.discourse-cdn.com/v4/letter/s/9de053/32.png) [@shanonia](https://community.cartalk.com/u/shanonia)\ **Post date:** [February 26, 2021, 7:48pm UTC](https://community.cartalk.com/t/03-altima-heating-cooling-issue/175444/8 "2021-02-26T19:48:03Z")
On some cars it’s important to have the heater control set on Hot to maximize coolant flow through the heater core and help air escape. The heat control, not the fan. ---
**Author:** ![scottadams650\_166242](https://avatars.discourse-cdn.com/v4/letter/s/3ec8ea/32.png) [@scottadams650\_166242](https://community.cartalk.com/u/scottadams650_166242)\ **Post date:** [February 27, 2021, 6:26pm UTC](https://community.cartalk.com/t/03-altima-heating-cooling-issue/175444/9 "2021-02-27T18:26:50Z")
Thank you, I will know today wheather or not all of these things worked or not. I appreciate your input,thanks again. ![](https://global.discourse-cdn.com/cartalk/original/2X/6/602d295699c664ee41f5e74eb1e2b9d202636f1e.png) > ![](https://global.discourse-cdn.com/cartalk/original/3X/6/5/65051141d8abdbcac3a95599bb22f86840c977a3.png "shanonia") | [shanonia](https://community.cartalk.com/u/shanonia) > February 26 | > > - | - | On some cars it’s important to have the heater control set on Hot to maximize coolant flow through the heater core and help air escape. The heat control, not the fan. ---
**Author:** ![scottadams650\_166242](https://avatars.discourse-cdn.com/v4/letter/s/3ec8ea/32.png) [@scottadams650\_166242](https://community.cartalk.com/u/scottadams650_166242)\ **Post date:** [March 1, 2021, 3:58am UTC](https://community.cartalk.com/t/03-altima-heating-cooling-issue/175444/10 "2021-03-01T03:58:23Z")
Any idea how the cooling system would be getting air into it.but not leak coolant? ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [March 1, 2021, 4:06am UTC](https://community.cartalk.com/t/03-altima-heating-cooling-issue/175444/11 "2021-03-01T04:06:29Z")
A leaking head gasket would allow cylinder gasses to enter the cooling system. Did you check the coolant level after the road test? ---
**Author:** ![scottadams650\_166242](https://avatars.discourse-cdn.com/v4/letter/s/3ec8ea/32.png) [@scottadams650\_166242](https://community.cartalk.com/u/scottadams650_166242)\ **Post date:** [March 1, 2021, 4:26am UTC](https://community.cartalk.com/t/03-altima-heating-cooling-issue/175444/12 "2021-03-01T04:26:56Z")
Yes I did,everything was spot on.I get goodheat from the heater,thermostats are opening at specified temps. Would a leaking head gasket cause the car to run ruff or ragged? ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [March 1, 2021, 4:31am UTC](https://community.cartalk.com/t/03-altima-heating-cooling-issue/175444/13 "2021-03-01T04:31:49Z")
If the cooling system is full and the heater is operating as expected, what is the problem? ---
**Author:** ![scottadams650\_166242](https://avatars.discourse-cdn.com/v4/letter/s/3ec8ea/32.png) [@scottadams650\_166242](https://community.cartalk.com/u/scottadams650_166242)\ **Post date:** [March 1, 2021, 4:40am UTC](https://community.cartalk.com/t/03-altima-heating-cooling-issue/175444/14 "2021-03-01T04:40:43Z")
I am still getting air in the cooling system somehow. I can hear like bubbling or gurgling on the passenger side of the vehicle after coming to a stop. So after car cools enough for me to open radiator cap, I’ll go thru the same steps as before to remove air trapped in system & I get air bubbkes for about 5-8 mins after reaching temp. Not constant like an air hose but rev it couple bubbles wait a minute oe two same thing.