Heater leaking antifreeze under hood

Maintenance/Repairs
1

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

2

The heater core is under the dash.

3

@11nico

Please tell us what you got

Make
model
model year
engine

4

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

5

@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?

6

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.

7

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

8

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