Smoke over 5.5k revs

[craigp172cup]

Right, i have noticed that when i floor it once the engine gets over 5.5k revs in any gear, smoke starts to pour out the exhaust. So much so that you cant even see out the rear window. Once i come off the pedal, it completely disappears but leaves the rear window soaking wet.

The smoke is not dark by any means, its very light and i cant smell anything in the car. It doesnt do it any other time that i can see other than with the pedal to the floor and over 5.5k.

Any ideas what this can be???

 

[jack_kemp]

Piston rings would be my guess mate.

 

[MicKPM]

Assuming its not losing coolant rings is a good guess but you say the rear screen is getting wet so it sounds like the bores are pushing water out to me - check coolant level and report back.

 

[JMR]

I would say, not smoke, but steam.
Condensation mate from water being burnt off as steam that has settled in the tailpipes of the exhaust.
Mine exactly same and I have a RB182cup.

You will most probably find that this happens a hell of a lot less in the warmer weather.

 

[regi james]

are you sure its not the normal- 'rear boxes full of water syndrone'
oh darng beaten to it lol

 

[TheEvilGiraffe]

Smoke will probably be black (over fuelling).

Steam will be white, more prominent in the cold and wet as mentioned !

Reversing off my driveway in the morning in the scoob is a nightmare. I just use the force TBH. Can't see fo' sh*t.

 

[craigp172cup]

Right steam from water sitting in the rear boxes sounds to me like a logical answer since it is really light and not at all dark. It doesn't linger either if you know what I mean. But why does it only happen above 5.5k revs??

 

[Rob_f]

Mine does this, I asked before and was told its basically water in the exhaust. If you drive for an hour or so you can clear it all out but it will be the same in a couple of days with this shitty weather.

 

[TheEvilGiraffe]

Right steam from water sitting in the rear boxes sounds to me like a logical answer since it is really light and not at all dark. It doesn't linger either if you know what I mean. But why does it only happen above 5.5k revs??

Velocity + temperature of exhaust gases at higher engine speeds perhaps ?

Combustion leads to a range of gases being expelled from the cylinder, including H2O as steam. If you're just pootling about, the steam will condense in the back boxes as they are cool relative to the first section of the exhaust, especially so at this time of year when it's <5C ambient.

 

[Fred@BTM]

all 182's do it

 

[craigp172cup]

Cool, cheers for the help guys. Sounds like there's nothing to worry about then. Phew. Would you still get this with an after market exhaust system.

 

[regi james]

give it a good thrashing/long drive

 

[blambert]

http://www.youtube.com/watch?v=FghYxF9EbQA

Like that? That's water after being sat on ramps for a few days.

 

[Silent_Scone]

rofl thats nothing. If you wanna see panic smoke come to my warehouse

 

[jack_kemp]

I didn't notice you had a 182, saw your name and assumed!