Smoke/vapour coming from engine - 2001 S80 T6

Tannhauser · Post by **Tannhauser** » 22 Apr 2025, 21:11

As you can see from the video clip, have a steady plume of smoke or maybe coolant vapour coming out of the engine block. No coolant leak on the ground.

https://files.catbox.moe/7oob2m.mp4

Another member suggested it could be the turbo drain pipe, any ideas on how I would diagnose this problem? I'm beginning to get a bit fed up, seems like as soon as I fix one problem another one occurs.

Also, is there any way I can test the engine fan? Car was idling for a good 10 mins and got up to standard operating temp but it never came on.

Cheers

Vova585 · Post by **Vova585** » 23 Apr 2025, 20:28

Can't open the link. Please try to post to YouTube and repost link here

Tannhauser · Post by **Tannhauser** » 26 Apr 2025, 13:18

Link works fine for me, but here ya go

Vova585 · Post by **Vova585** » 26 Apr 2025, 16:16

Interesting video. Hard to tell what is going on from this angle. Couple possibilities: you are next to the coolant lines to the heater core. Possibly one of them developed small leak which you can see in a form of smoke. Possibility 2 something with the PCV system. Open the engine oil fill cap and see if the smoke will start coming from there and stop from the current area. If that would be oil seeping from oil drain you would likely first notice burning oil smell. Somehow doubt exhaust leak at this time, but might be better to take a small borescope camera and look around that area.

Tannhauser · Post by **Tannhauser** » 27 Apr 2025, 07:48

Today the mysterious smoking stopped, very odd. Instead I had a good time throwing a bunch of engine codes and hitting limp mode because I put the TCV hoses in wrong and used too wide a hose clamp for the charge air pipe into the throttle body so it came off completely. Have fixed those issues, need to do the glove test to see if the PCV is totally flogged but the entire time I've had the car it has always stank the place up with exhaust smell the whole time, also get a ticking sound at the back once it gets going.

I did try to locate the exhaust leak prev just by covering the system with bubble solution and jamming a leaf blower up the pipe, I found one main leak near one of the joins and patched it up but I'd say it's entirely likely the entire exhaust is cactus and needs to be replaced. Yay.