puff of smoke
Turbo Mini Forums

wondered if you lovely ladies and gentlemen could help me, on acceralation i get a puff of smoke out the exhust and on over run also sometimes when i putt my foot down it seems to miss fire could these be linked help needed many thanx

steve

era turbo - not even the mrs gets to drive it

overfueling?

Smoke on overrun is typically worn valve stem seals.

Is it blue smoke?

if the fueling checks out OK???

then the problem will lie with worn bores and ring if all else checks out!

the valve guides like tom says are a problem as well!

But in my experience its 90%+....... the bores & rings especially if its blue smoke!

i bet the engines done starship miles & had some wellie bob as well!!!!

do a compresion test to see whats what

a leak down test "WILL REVEAL ALL"!

Edited by BENROSS on 20th Jul, 2005.

also this can be oil from the dash pot if you put to much in. just another thought

always looking for them bigger bunches of bannanas

100% valves/guides seals. If it does it on overrun, it's always the guides.
Worn rings and bores give blue smoke on full throttle.

If it smokes on idle,jack the front of the car up to see if it's the guides or not (i think)??

Metro turbo weekend driver,Mini turbo in the making again!

i would be inclined to disagree vegard.
Too much emphasis is devoted to valve guide wear! buddy.

in my book and many others!..................

who have had over 30 years experience with the A series engine and many other motors

90+% its the bores & ring blow by

thank you lads alot will have my dad go out in it and ill follow no it hasn't done moon milege and its been sitting for a while only 20k on the clock from 1989 and the mot's say the same thanx again

era turbo - not even the mrs gets to drive it

Smoke on overrun is usually valve guides, as the vacuum pulls oil down through the worn guides or stem seals.

Smoke on acceleration is more likely piston rings!

But I think you have given the answer away- if it has been sat about a while, the stem seal material can sometimes go hard, and hence not seal so well.

Given the mileage you quote, I'd be suprised if it was serious wear ANYWHERE in the engine, my bet is stem seals are not sealing well simply due to OLD AGE rather than anything else.

would be nice for an update tom if ministeve replaced the valve guides & seals

we will see!.. guys

keep us posted ministeve

cant touch it till the 3month warnity is up have like the bloke i brought it from no there a problem he's looking into it will keep you gents post thanx again for your much needed help

era turbo - not even the mrs gets to drive it

had this on mine if you remember rolling road pics, randomly sometimes when idling when warmed up it owuld do it too until you reved it slightley, sorted it out with some new valve stem seals

Previous Engine: 1040cc Morespeed engine, 1275 turbo head T2 Turbo Mirage Manifolds Megajolt
Previous engine: STD metro turbo, megajolt
Drives: 399bananahp (flywheel) Honda Civic Vtec b18c4 T28 Turbo 1968 Mini

Megajolt maps to download: http://www.jamesfawcett.co.uk/cms/index.ph...&gid=3&Itemid=3

update on the probs, well changed the oil was pretty dirty no more smoke or any probs on the engine front not just losing water, about a inch after a long drive of varied driving, have water marks on the top of the rad and on the aux rad but cant find any splits, i have standard rubber pipes any ideas

steve

era turbo - not even the mrs gets to drive it

All i can place the smoke down to is
now you have changed the worn out oil & may be to a thicker viscosity ?

its not passing the rings and maybe! the guides quite so easily

so the engine cant be that badly worn which is great news for you

the water problem if you can find no physical evidence of any external leaks!

then if there is no water to oil or ... oil to water contamination you could have a pending failing head gasket ?

keep your eye on the situation and good luck