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The smell of coolant...after driving.

1780 Views 9 Replies 6 Participants Last post by  diesel
It has the odor of coolant under hood after driving (hot engine).

Dealer said they didn't know where the smell was coming from at its last oil change (5K miles ago) and while it was under warranty.

Coolant bottle cap is tight and it doesn't smell like its coming from that side of the car anyways.

Smell is more upfront and on the passenger side. However, just standing in front of the car and opening the hood, you get a good wif of it.

No coolant on the ground.

Ideas......

Just under 41K miles and 3 years old on the 12/21.
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Smell is more upfront and on the passenger side.
Given the area, I think the water pump is the most likely suspect.

If it was the driver's side, it would be the water outlet.
I'd go with water pump or thermostat.
How big of a beatch is it to swap out the water pump?
How big of a beatch is it to swap out the water pump?
Not overtly difficult, but there's a 10 year/150k extended warranty on it. Let GM pay for it.
Not overtly difficult, but there's a 10 year/150k extended warranty on it. Let GM pay for it.
Is that for a diesel as well? I think the op has a diesel
Is that for a diesel as well? I think the op has a diesel
Oh sorry - mobile app and didn't see that. Should still at least be under 5/100 PT warranty then. Probably a more difficult job to get to on the diesel too.
Oops. My advice was based on the gasser. I'm not sure as the diesel has had those kinds of problems.
I think a pump is still a good possibility considering the location. But I have had things as annoying as a slightly loose hose clamp or tiny pinhole leak in a radiator hose not leave much of a trace of coolant either.

You can shine around the engine bay with a blacklight and see if it will show any coolant accumulating somewhere.
Haven't heard of any bad water pumps on the diesels.
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