# Heater leaking antifreeze under hood

**URL:** <https://community.cartalk.com/t/heater-leaking-antifreeze-under-hood/82934>\
**Category:** Maintenance/Repairs\
**Created:** [January 2, 2014, 12:37am UTC](https://community.cartalk.com/t/heater-leaking-antifreeze-under-hood/82934 "2014-01-02T00:37:04Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![11nico](https://avatars.discourse-cdn.com/v4/letter/1/858c86/32.png) [@11nico](https://community.cartalk.com/u/11nico)\
**Post date:** [January 2, 2014, 12:37am UTC](https://community.cartalk.com/t/heater-leaking-antifreeze-under-hood/82934/1 "2014-01-02T00:37:04Z")

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Where would it be leaking?  
From solenoid valve or heater coil?  
Lose 1 liter a week

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**Author:** ![keith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/keith/32/5518_2.png) [@keith](https://community.cartalk.com/u/keith)\
**Post date:** [January 2, 2014, 12:41am UTC](https://community.cartalk.com/t/heater-leaking-antifreeze-under-hood/82934/2 "2014-01-02T00:41:36Z")

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The heater core is under the dash.

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**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\
**Post date:** [January 2, 2014, 12:45am UTC](https://community.cartalk.com/t/heater-leaking-antifreeze-under-hood/82934/3 "2014-01-02T00:45:04Z")

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@11nico

Please tell us what you got

Make  
model  
model year  
engine

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<div class="post-metadata">

**Author:** ![11nico](https://avatars.discourse-cdn.com/v4/letter/1/858c86/32.png) [@11nico](https://community.cartalk.com/u/11nico)\
**Post date:** [January 2, 2014, 2:44am UTC](https://community.cartalk.com/t/heater-leaking-antifreeze-under-hood/82934/4 "2014-01-02T02:44:20Z")

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2004 Nissan Quest  
Leaking from right side of solenoid valve.  
Should I replace valve or fix gasket?

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<div class="post-metadata">

**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\
**Post date:** [January 2, 2014, 4:15am UTC](https://community.cartalk.com/t/heater-leaking-antifreeze-under-hood/82934/5 "2014-01-02T04:15:16Z")

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@11nico

What is this solenoid valve?

Does it control coolant flow to the heater?

If the solenoid is leaking, I would just replace it.

Are you even sure that the gasket is even available?

Do you feel comfortable taking apart the solenoid?

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<div class="post-metadata">

**Author:** ![11nico](https://avatars.discourse-cdn.com/v4/letter/1/858c86/32.png) [@11nico](https://community.cartalk.com/u/11nico)\
**Post date:** [January 2, 2014, 5:29am UTC](https://community.cartalk.com/t/heater-leaking-antifreeze-under-hood/82934/6 "2014-01-02T05:29:46Z")

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attached to upper firewall.  
Left side holds wire harness, right side attaches a hos. Behind is another hose.  
This item is leaking coolant.  
Not sure of name for this part.  
In the shape of 2 cylinders, between them seems to be a gasket.

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**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:** [January 2, 2014, 5:46am UTC](https://community.cartalk.com/t/heater-leaking-antifreeze-under-hood/82934/7 "2014-01-02T05:46:11Z")

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You may be looking at the auxiliary pump for the rear heater. Replace the pump if it is leaking.

[http://parts.nissanusa.com/nissanparts/index.cfm?bodyColor=&trimColor=&BODY=W&ENGINE=VQ35DE&GRADE=S&TRANS=4AT&action=replacement&groupid=E&sectionid=278&partcode=92516&jointvehid=11344&makeid=25&siteid=14&illust\_seq=01&partnumber=Part+Number&description=Keyword](http://parts.nissanusa.com/nissanparts/index.cfm?bodyColor=&trimColor=&BODY=W&ENGINE=VQ35DE&GRADE=S&TRANS=4AT&action=replacement&groupid=E&sectionid=278&partcode=92516&jointvehid=11344&makeid=25&siteid=14&illust_seq=01&partnumber=Part+Number&description=Keyword)

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<div class="post-metadata">

**Author:** ![11nico](https://avatars.discourse-cdn.com/v4/letter/1/858c86/32.png) [@11nico](https://community.cartalk.com/u/11nico)\
**Post date:** [January 6, 2014, 6:45pm UTC](https://community.cartalk.com/t/heater-leaking-antifreeze-under-hood/82934/8 "2014-01-06T18:45:27Z")

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cant seem to find part anywhere.  
What is part name?