2009 MDX making noise like pressure releasing


#1

I have a 2009 Acura MDX. This morning I was sitting in my car for a few minutes after turning it on. All of the sudden I heard a very loud noise like air pressure being released. Then there was white smoke coming into the cabin that smelled like burnt rubber. I turned off the car then turned it back on, and again this sound began after it idled for a couple minutes. Then my husband came home from work to check it out, and of course it did t do it. But we think the exhaust smoke may be a little whiter than normal and has a slight burnt smell to it. Any suggestions would be greatly appreciated. Thank-you!


#2

Btw the sound lasted for about a second, stopped, then continued every 10 seconds or so


#3

One of two things have happened.

Either the heater core or the evaporator for the AC system has ruptured.

Tester


#4

Thank you so much.

My husband is convinced it’s the head gasket (he tends to be a fatalist and assume the worst) any chance it could be that?


#5

It’s not the head gaskets(s). I agree with @Tester on this.


#6

If it smelled like burnt rubber, it oil that spewed. Heater core would give a sweet smell. A/C hose or oil sensor would be my guess. You’ll need to have it towed, because leaking oil is a fire hazard.


#7

Thanks so much - it didn’t smell like burnt oil, different smell than that - I know it’s hard to describe smells. But just dropped it off at the shop, I will update when I hear what it is.


#8

Apparently the AC relief valve blew and coolant got on the frame causing the smoke. Thanks for your help!