puff of smoke and what boost

**adam280** · Saturday 11th February 2012, 12:32

ive noticed when im boosting hard and come off the throttle i get a puff of blue smoke is this normal after a turbo rebuild or is it likely to be valve stem seals. also where is the best place to fit a vacuum line through the bulk head for a boost gauge and what should it be boosting at its a v70r 1998 with a hlm 310 cheers adam

**T5frankie** · Saturday 11th February 2012, 12:46

you sure its blue? thats not a good sign mate thats a sign of a tired engine, sure its not black?

**adam280** · Saturday 11th February 2012, 12:53

looks blue, but it was getting dark ill try in the daylight

**T5frankie** · Saturday 11th February 2012, 12:55

leave it running (ticking over) when it warms does it start to smoke? thats valve seals if it does that

**adam280** · Saturday 11th February 2012, 12:58

no smoke at all when idle. i had my brother following me last night and he said there was no smoke. ive noticed it when im booting it in third then letting off but not all the time. weird lol

**T5frankie** · Saturday 11th February 2012, 13:40

sounds like unburnt fuel mate thats all

**adam280** · Saturday 11th February 2012, 14:53

hopefully

**T5frankie** · Saturday 11th February 2012, 15:03

how is it driving though? it must feel rapid compared to how it was

**adam280** · Saturday 11th February 2012, 20:57

yeah feels like a new car. Was out in it today didnt see any smoke so hopefully should be ok. I rigged a boost gauge up dont know if its working cus it was reading -0.5 bar and when on full boost was going up to + 1bar does this sound right?

**T5frankie** · Saturday 11th February 2012, 21:00

Originally Posted by adam280

yeah feels like a new car. Was out in it today didnt see any smoke so hopefully should be ok. I rigged a boost gauge up dont know if its working cus it was reading -0.5 bar and when on full boost was going up to + 1bar does this sound right?

yeah mate sounds good 1 bar is 14.5 psi standard is 10 psi, bet its flying, get an mbc on now and turn up to 17-18psi mate lol

**adam280** · Saturday 11th February 2012, 21:25

Feels allot quicker than it was before. Should the gauge be reading - 0.5 when off boost. Was a bit worried about the smoke so aint give it loads yet. Dont know if im gonna fit the dump valve i like the sound it makes with the blanking plate on. I know some say it aint good for the turbo

**LiamT4** · Saturday 11th February 2012, 21:30

Originally Posted by adam280

Feels allot quicker than it was before. Should the gauge be reading - 0.5 when off boost. Was a bit worried about the smoke so aint give it loads yet. Dont know if im gonna fit the dump valve i like the sound it makes with the blanking plate on. I know some say it aint good for the turbo

Yes, thats normal.