richbogle

i realy need help! iv just had my valve guides (bronze) and stem seals done in my 200 block stage 3 sapphire,due 2 reek on over-run! and its still doing it!!! i just dnt know what to do next. i bought the car cuple of year ago and i noticed it done it from day 1. due to another miss-hap,the full bottom end got re-built. bored out, 0.5 oversize pistons and all the usual. now the heads been re-built aswell and the car still does it! no worse and no better.the reek is blue,kinda hard to tell tho. it only does it when going down hill and accelerating again at bottom it reeks 4 a cuple of secs then goes away and its perfect! its minted all the way up the gears, only does it as i say,when putting foot down again after a hill. but if i put it out of gear when going down hill and back in gear at bottom,its ok! its like sum sort of breathing problem,iv briefly checked them and seem ok.but i think il check again.. PLEASE HELP i love this car but this problem is realy starting to put me off it which is a shame thanx...

gingerturbo

iTrader: (2)

sound like the back pressure sending oil up the main oil breather and coming through the exhaust valves, have ya got a baileys oil breather/seperator, try going through bits ya aint changed

richbogle

yea cars got the breathers. the one from block down drivers side going up in2 can next 2 battery.rocker cover also goes in2 the can,also the one from the box under the inlet goes in2 it aswell.and then just the outlet that goes under car...

gingerturbo

iTrader: (2)

?mmmm have ya got any sitting oil in ya cooler or pipes,

ajamesc

Its a cossie if it dont use oil smoke and smell of oil id be worryed then lol

m4tt274

iTrader: (2)

if its being doing it for a while i wouldnt worry to much.
most cossys smoke tbh.
its charecter.

could be turbo related?

airwave

what grade of oil r you using, mine done that put fully synth 15w 50 in worked a treat

tabetha

I would use at least a 50 weight oil, if not 60, if it's blue it shows it has been burnt, so won't have come down exhaust stems, make sure all the breather stuff is clear, that it's not running rich, then try a thicker oil.
tabetha

richbogle

think it is overfueling. need it checked asap! didnt thik overfueling wld have they symtoms tho! hope im wrong...so what oil will i use then?? 10 60?

john_p_b

iTrader: (4)

turbo. Mine did exactly the same thing, just pulls a really small amount of oil through on over run but enough to make smoke!

richbogle

had the t34 done by vince at CR turbos. then had it sent back as faulty and they done it again,even tho he sayd ther was hee haw wrong with it... NIGHTMARE

cozmeister

iTrader: (1)

No disrespect to anyone that's already contributed, but recently I thought I had a fuel pressure/delivery problem that turned out to be a combination of electrical faults, ruined exhaust valves (one had a hole!), ruined exhaust valve seats, and a poorly refurbished head. I'd never have found those on my own or even with help from well-meaning forum users saying "check this, check that".

I learned that the best thing to do is instead of everyone playing guessing games and wasting time not identifying the problem, take it to a Cosworth expert, or at least ring one for advice. You'll not get to the bottom of it otherwise. It could be something major that you can't see, and won't find out about until it goes bang, or it could equally be something minor that an expert can spot and maybe solve in 5 minutes, but you won't find because you're looking for a splinter in a forest.

Hope this helps.


Same here