Smoking Cosworth
#1
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I noticed last night my Sapphire has started to smoke a bit on overrun,taking it out today and it seems ok at start up but again quite a bit of smoke on overrun and giving it a rev from idle once i stopped it gave a few puffs and seemed to clear at normal driving speeds.
A bit of googling suggests valve guides maybe stem seals or the turbo could be on the way.
Being new to the Cosworth engine what's best to start with?
It's meant to be on a stand next weekend at the McRae rally challenge so I could do with it being something simple I hope.Being an old Ford though I doubt it haha
A bit of googling suggests valve guides maybe stem seals or the turbo could be on the way.
Being new to the Cosworth engine what's best to start with?
It's meant to be on a stand next weekend at the McRae rally challenge so I could do with it being something simple I hope.Being an old Ford though I doubt it haha
#2
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Check what oil it is running, then get a cylinder leak down test and compression test after you have used it in anger on decent fuel. After that it could be rebuild etc but use it well first.
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stevenr (08-05-2015)
#4
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More blue colour I'd say which suggests it's being burnt doesn't it?
Might just see if I can get someone to have a look.Wife will go nuts spending more money on it just now
Might just see if I can get someone to have a look.Wife will go nuts spending more money on it just now
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#5
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No smoke on start is a good sign so rules out stem seals and guides.
Overrun could suggest turbo. Remove turbo to cooler pipe and check for oil.
This oil finds its way into intake manifold and on overrun which creates vacuum sucks oil into combustion.
What breather system are you using and is it clean?
Overrun could suggest turbo. Remove turbo to cooler pipe and check for oil.
This oil finds its way into intake manifold and on overrun which creates vacuum sucks oil into combustion.
What breather system are you using and is it clean?
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stevenr (08-05-2015)
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#8
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I spoke to someone about it today and he pretty much said the same thing.
What's coming out of this thing though is a bit more than just the usual wee puff here and there.
Going to have a look at the pipework and breather system and try that today before making the call for surgery on monday
What's coming out of this thing though is a bit more than just the usual wee puff here and there.
Going to have a look at the pipework and breather system and try that today before making the call for surgery on monday
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There's no oil in the turbo to cooler pipe at all,slight play in the turbo though.
Breather system cleaned out too although it wasn't too bad but took it out a run and still smoking like a fucker after a good booting.Still pulls very well though
Breather system cleaned out too although it wasn't too bad but took it out a run and still smoking like a fucker after a good booting.Still pulls very well though
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If it was black i wouldn't really care about it but this blue stuff worries me a bit,well not so much worries me but it scares the shit out of my wallet
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Coloured smoke is never normal (if the engine is on operating temp!). When ppl agree and say "it's an old car, so it's normal" so they think it's not worth it to fix such an old car IMO. ![Big Grin](https://passionford.com/forum/images/smilies/icon_mrgreen.gif)
Blue smoke is a sign of unburnt fuel or burnt oil. You can fix this problem, never mind how old the car is, it is never normal, at most tolerable
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Blue smoke is a sign of unburnt fuel or burnt oil. You can fix this problem, never mind how old the car is, it is never normal, at most tolerable
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Last edited by Cossiemainful; 10-05-2015 at 01:21 PM.
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Have a leak down test as I had similar on my 3 door it smoked on over run and cleared under boost, I tried all the usual, and it ended up being a bit of everything but biggest concern was bore wear. Ended up with full rebuild and it hasn't really used any oil since. Expensive but worth it if keeping car. Once I knew what it was I just started collecting main parts a bit at a time then pulled engine out over winter and got it done.
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#21
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It's going in to get checked out next week.Hoping it's nothing too serious but needs fixed anyway so I'll be letting them deal with it.
Just noticed something last night though,the little plastic stopper on top of my dipstick is fucked and moving up and down so i'm not getting a proper reading.Too much oil wouldn't be helping would it?
Just noticed something last night though,the little plastic stopper on top of my dipstick is fucked and moving up and down so i'm not getting a proper reading.Too much oil wouldn't be helping would it?
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