Hot Burning Smell

[Idaho Red Rocket 3]

My Wife and I have been test driving many differant Boxsters in our search for the perfect up grade from our '98 beginner Base Boxster. Something we have noticed on a few test drives is a hot burning smell. It is very strong coming from the engine compartment and can be smelled much stronger if you put your nose close to either the right or left side intake/vent ports. Otherwise cars seem to perform normally. Any ideas what this is caused by ? Is this a common phenomenon ?

BTW: On this trip...153 new best.

[Dale_K]

I've got a stinky burnt smell from the 2000 S tiptronic I bought a couple weeks ago and I suspect some kind of fluid leak. Funny because there's not a drip mark anywhere on the garage floor. Mine doesn't smell like oil or coolant and I suspect possibly ATF making it onto something hot, like the exhaust but that's just a guess. The smell is most noticable from the right side rear fender vent and I think that's the trans output location. The shop manual mentions the possibility of the tiptronic fluid leaking into the diff and then overfilling the diff out the vent.

It would be kind of reassuring to hear that burning smells are normal but I doubt it.

[lifeisgood]

Can we have some input from the experts? Jake Raby, Mike focke or Predro (that's all the name that I can think of) and of course other Porsche engineers?

Some said it can be Cosmoline protection? , but should it be gone after a year or two. Mine is a MY06 and yes I do have that burnt smell too.

Thanks in advance.

[WhipE350]

Idaho, is it a sweet smell, or more like burning oil. Does the engine have to be hot and ran for some time...is it worse after driving hard?

The vent on the right side (I call it my garage heater ) comes right off the engine. I'm not an expert on Porsches but I know the pipe to put oil in the car crosses right over the engine, it is the only thing that has leaked on my car. The other thing is antifreeze has a sweet smell. I also find that these older cars the catalytic converters sometimes give off an odor. Anyway maybe the experts will chime in. Have you looked at the engines on any of the ones you test drove to see if they were a mess or not?

[jmatta]

Mine doesn't smell whatsoever. Something is leaking to cause the burning smell and would highly suggest a PPI on any car you consider purchasing to find the source. Perhaps it's just the IMS bearing burning up?

[Oaktown 986]

Originally Posted by jmatta

Mine doesn't smell whatsoever. Something is leaking to cause the burning smell and would highly suggest a PPI on any car you consider purchasing to find the source. Perhaps it's just the IMS bearing burning up?

Hehe. When are you shifting? I've seen a Boxster or two driven by someone... conservative... that gets shifted before 3k and gets a clutch-burning smell. I'm always inclined to say driver-error. Then again, mine smells like coolant when I drive hard.. and has for the past 40,000 miles.

[blue2000s]

Originally Posted by Dale_K

I've got a stinky burnt smell from the 2000 S tiptronic I bought a couple weeks ago and I suspect some kind of fluid leak. Funny because there's not a drip mark anywhere on the garage floor. Mine doesn't smell like oil or coolant and I suspect possibly ATF making it onto something hot, like the exhaust but that's just a guess. The smell is most noticable from the right side rear fender vent and I think that's the trans output location. The shop manual mentions the possibility of the tiptronic fluid leaking into the diff and then overfilling the diff out the vent.

It would be kind of reassuring to hear that burning smells are normal but I doubt it.

When a CV boot goes, grease slings all over the place including the exhaust and makes an unusual smell.

[Idaho Red Rocket 3]

Thanks for the responses.
Three cars so far have had burning smells. Yes all at dealers. No PPI yet. Nothing like antifreeze smell. Not like an oil burn smell either. All with manual trans.

1) 2002 S with 72k miles. Strong hot burning smell reminds me of an electrical burn smell but not quit exactly. The more it is driven the stronger the smell. Car had very stiff steering. Heavy in my hand. Can smell in cab with top down at stop lights. Strong smell all around car when finished test drive.

2) 2006 Base with 27k miles. Strong hot burning smell reminds me of a rubber smell but again not quit. Strongest on standing at the right rear fender. But still pungent standing at the left side too.

3) 2006 Base with 35k miles. Faint hot burning smell on left side but stronger on the right. Similar smell as car 2 but not as heavy.

[Iflylow]

I have the same smell. I investigated, and found a slight leak from one of the spark plug tubes. It is not enough to drip when parked, but you can see a trail showing the leak dripping onto the exhaust, right around the O2 sensor.

From what I understand, it is a common issue, but an easy fix (O-ring replacement)

It is a little embarrassing to park next to a friend, with a stinky, slightly smoky car

[WhipE350]

If these were larger dealers they may also have detailed/cleaned the engine, though since I'm new to Porsche and the engine is out of view I don't even know if that is a common practice. Or maybe they all have new tires and you are heating up some rubber .
Or like Iflylow is saying all three have had the bad luck of having a spark plug tube seal leaking.
Find a private sale and drive one or take the one you like most to an indy and have them tell you. Could also be your cash burning or your increase in sensory after driving one of these machines
Let us know what you find out.

[blue2000s]

Originally Posted by Idaho Red Rocket 3

My Wife and I have been test driving many differant Boxsters in our search for the perfect up grade from our '98 beginner Base Boxster. Something we have noticed on a few test drives is a hot burning smell. It is very strong coming from the engine compartment and can be smelled much stronger if you put your nose close to either the right or left side intake/vent ports. Otherwise cars seem to perform normally. Any ideas what this is caused by ? Is this a common phenomenon ?

BTW: On this trip...153 new best.

Are you driving new cars at the dealer?