Nissan Quest2005 Antifreeze leaking

[kingfisher1111]

Mine is a 2005 NISSAN QUEST 4-speed. I started seeing anti-freeze leaking near heater hose. It is dripping from 2 spots. In the picture attached, above the white/blue part and where the red color. That is causing my engine to smoke and smoke travels inside and burnt smell. Do you know what i parts are those and how to fix it?

[AZhitman]

Welcome aboard, KF. It really depends on where the leak originates from. The best way to trace it is using a dye kit. Simple and effective, and available at any auto parts store.

I suspect that is a heater control valve of some sort, and probably not difficult to replace, but I'd make sure it's not leaking from elsewhere and traveling along something to get there.

Here's where you can pull the FSM for your Quest (for free), so that you can ID the exact name of the part that needs replacing: www.nissanservicemanual.com

[kingfisher1111]

I took it to the repair place. They told me, that they need to order 92264ZM70A rear heat auxillary pump which costs $115. Anyone faced this?

[far raf]

If it was only leaking above the blue plug, you could try removing the pump, opening it up and re-sealing it using liquid gasket. Nothing to lose, I guess. But as it is also leaking at the red part, which I suspect means that the leak is in the electric socket, you'll have to replace. Check Courtesy Nissan price before you buy elsewhere.

[kingfisher1111]

If it was only leaking above the blue plug, you could try removing the pump, opening it up and re-sealing it using liquid gasket. Nothing to lose, I guess. But as it is also leaking at the red part, which I suspect means that the leak is in the electric socket, you'll have to replace. Check Courtesy Nissan price before you buy elsewhere.

What is the part called oxygen sensor?

[AZhitman]

That's not a terrible price. If that corrects the leak, I think I'd pull the trigger and foster some goodwill with that mechanic/shop. Never know when you'll need them again.