Mud-club

Vehicle & Technical => Discovery => Topic started by: Mace on March 24, 2006, 15:40:34

Title: Puffing blue smoke
Post by: Mace on March 24, 2006, 15:40:34: Symptoms...300tdi

2nd/3rd gear Low Ratio, on an incline, power on, blue tinge to exhaust gases. Comes and goes.

One occassion only, long decent with little throttle, blue cloud of smoke only when I pulled away. Stopped instantly, no more smoke.

Doesn't do it any other time. Any gear any ratio, 20 or 70 mph, uphill or down hill. Full loaded or empty. Doesn't do it when cold, doesn't do it when left to idle for 5 mins, doesn't do it at start up, doesn't do it if left to stand. Emmissions are dam good according to MOT man.

Oil is obviously getting into the inlet, but where from and why only at certain times ? Any info gratefully received :-)
Title: Puffing blue smoke
Post by: muddysteve on March 24, 2006, 15:46:52: mine puffs out a bit of blue smoke when on steep incines or steep decents its just oil getting places it shouldnt when the engine is tipped at an angle its not supposed to be at

my advice would be to forget about it

Steve
Title: Puffing blue smoke
Post by: davidlandy on March 24, 2006, 16:38:16: whip the top intercooler hose off and have a peek in there see if there is any gunge - if so clean it out

do you have an egr valve ?
Title: Puffing blue smoke
Post by: Mace on March 24, 2006, 16:42:41: Sorry Dave forgot to mention that. Yep EGR blanked off ages ago. Gunk cleaned out too along with the intercooler around 2000 miles ago. Twaz spotless when I put it back together. Checked it all the other day and there's the usual traces of oil in the pipe that leads to the inlet but nothing bad.
Title: Puffing blue smoke
Post by: davidlandy on March 24, 2006, 16:47:27: a little oil in there is quite normal

I wonder if its a worn valve guide seal or two - the incline could make it appear under certain circumstances

hmmmm
Title: Puffing blue smoke
Post by: Mace on March 25, 2006, 10:07:17: Maybe there is a worn valve guide seal but the head was brand new around 5k miles ago. I also would have thought it would drip oil into the chamber when sat still or idling for a while. In both case it doesn't then produce blue smoke.

Are there any breathers that might be blocked or clogged with oil that vent into the inlet side?

It's also funny that it doesn't matter how much grief I give it at road speeds, it doesn't smoke.
Title: Puffing blue smoke
Post by: Range Rover Blues on March 25, 2006, 15:05:44: It's probably a small puddle od oil somewhere that runs into the engine on the incline, unless of course there is a breather somewhere that is closer to the oil spray than usual on the incline. If it doesn't drink oil I'd leave well alone.