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Burnt smell through vent

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Old 11-12-2014, 03:17 PM
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Burnt smell through vent

What can cause a burnt smell coming through the vent everytime I turn on the heater on these Maximas? Where can I look to see this problem?
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Old 11-12-2014, 05:57 PM
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What kind of smell is it? Is it oil, is it wire insulation, is it electrical component?

You have to be more descriptive.
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Old 11-12-2014, 06:04 PM
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Originally Posted by egali045
What can cause a burnt smell coming through the vent everytime I turn on the heater on these Maximas? Where can I look to see this problem?
Given the description you have given, I would open the hood and remove the neighbors cat remains that was using your engine heat over night ... this may help in reducing that burnt smell every time you start up the engine.
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Old 11-12-2014, 06:39 PM
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I would pull out the cabin air filter (located behind the glovebox) and see if there's anything obstructing that got sucked into the blower motor. Leaves and/or mice can get in there

Here's a how to video:

https://www.youtube.com/watch?v=_WgA8IYcaxU
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Old 11-12-2014, 08:03 PM
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What kind of burning smell?
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Old 11-12-2014, 09:21 PM
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I really don't know what kind of smell but it smells like plastic. Maybe oil? I heard it can be anti freeze/coolant. But it only smells like for 3 mins and then goes away. I do hear the motor loud when I turn it on and it also goes away. It does come back when I hit bumps vice versa.
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Old 11-12-2014, 09:22 PM
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I keep my car in the garage and I do know how dead rats smell like so I'm sure it ain't that.
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Old 11-12-2014, 09:25 PM
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Blower motor is shot. Can use 4th or 5th gen motor.
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Old 11-15-2014, 12:55 PM
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what my moneys on here. Coolant smell

Originally Posted by Child_uv_KoRn
Blower motor is shot. Can use 4th or 5th gen motor.
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Old 11-15-2014, 03:31 PM
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Originally Posted by a33_ridah
what my moneys on here. Coolant smell
So it's not the blower motor?
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Old 11-15-2014, 06:39 PM
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Originally Posted by egali045

So it's not the blower motor?
Have you pulled the cabin filter and got the stuff out of there?
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Old 11-16-2014, 09:20 AM
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coolant smell could be coming from a faulty heater core...blower is just blowing the air carrying smells exchanged in the heater core. that could be the stem of your problems. my best guess.
Originally Posted by egali045
So it's not the blower motor?
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Old 11-16-2014, 01:00 PM
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Originally Posted by a33_ridah
coolant smell could be coming from a faulty heater core...blower is just blowing the air carrying smells exchanged in the heater core. that could be the stem of your problems. my best guess.
So it's not the blower motor? Should i just replace both the heater core and blower motor? Heater core for the smell? And blower motor for the sound? Now I'm not getting the right speed of the heat. What if I fix the heater core but not the blower motor.
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Old 11-16-2014, 01:52 PM
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coolant doesn't smell burnt :|
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Old 11-16-2014, 09:11 PM
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So what's that burning smell? Blower motor? If it is, it be better than replacing heater core. Someone pls tell me it's the motor.
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Old 11-16-2014, 09:12 PM
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Originally Posted by nestorlugo
Have you pulled the cabin filter and got the stuff out of there?
No I have not. What should I expect from the cabin filter?
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Old 11-16-2014, 09:25 PM
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Originally Posted by egali045

No I have not. What should I expect from the cabin filter?
10+ yrs worth of crap if indeed it does have one,

Last edited by nestorlugo; 11-16-2014 at 09:27 PM.
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Old 11-17-2014, 06:49 PM
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Could be oil.....i had that issue for a while before i too my lazy behind under the hood to check. Gaskets were leaking. Smelled burnt every time i turned on the AC
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Old 11-17-2014, 07:28 PM
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Originally Posted by jared21927
Could be oil.....i had that issue for a while before i too my lazy behind under the hood to check. Gaskets were leaking. Smelled burnt every time i turned on the AC
good point
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Old 11-19-2014, 08:16 PM
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Originally Posted by jared21927
Could be oil.....i had that issue for a while before i too my lazy behind under the hood to check. Gaskets were leaking. Smelled burnt every time i turned on the AC
You know what you might be right.Maybe that's why I still have oil consumption. I had the oil pan replace but I don't think that solved the issue. Which gaskets did you replace? Did you do it yourself?
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Old 11-20-2014, 05:27 AM
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Originally Posted by egali045
You know what you might be right.Maybe that's why I still have oil consumption. I had the oil pan replace but I don't think that solved the issue. Which gaskets did you replace? Did you do it yourself?
Might be the rear valve cover gasket. I'm have the same burned smell issue, but it def smells like oil in my case.
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Old 02-03-2018, 04:02 PM
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Reviving an old thread here:

I’m having a similar issue. In my case, it smells like burning rubber. Only when the blower is on. I’ve checked my engine bay and have not found any foriegn objects that may have been stuck in there. Another important thing to note is that you can smell the exact same smell from outside the car, even stronger.

My coolant level is steady, so I don’t think it’s that. My rear valve cover is pretty wet, but that’s the only leak. But it doesn’t smell like oil.

Sometimes it smells, sometimes not. But you can always smell it outside after the car has been running. I’m thinking cat or something? Just wanted to get ideas
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Old 02-05-2018, 09:43 AM
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Since you can smell it outside the car, that is probably where it is originating at. Check along the exhaust pipes for something touching them, from the exhaust manifolds and back. A catalytic converter that is plugging will smell, but that is rather distinctive, something like rotten eggs which is sulfur dioxide.
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Old 02-05-2018, 04:11 PM
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I’ll do some nosing around and see what I can find. My blower motor resistor blew, so I pulled it out. But the smell was there before the resistor blew.
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Old 02-06-2018, 02:57 PM
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Took a look around, didn’t find anything. However, the rear VC is more wet than I remember, so it could very well be from that.
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Old 02-07-2018, 10:55 AM
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Originally Posted by SubwayVQ
Took a look around, didn’t find anything. However, the rear VC is more wet than I remember, so it could very well be from that.
Your blower motor is about to go out. Had the same problem it is either the blower motor or the fan amp controller. But during smell is def most likely from there.
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