Blue smoke on overrun
29-09-2007, 06:12 PM
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Blue smoke on overrun
Is this bad?? I'm getting it when letting off at anywhere above 4k ish in 5th. Its not a massive amount but enough, if you know what I mean 
29-09-2007, 06:17 PM
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Originally Posted by COMEDY DAN
They didnt do that out of the factory so I guess its not good mate.
Its going to get a freshen up in the new year anyway but was just curious as to what the possible cause was. I rarely go that far up the rev range in 5th anyway so its not like it see's it everyday
29-09-2007, 07:38 PM
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Was going to say welcome to Cossie ownership but saw your sig! 
I think Blue Smoke is turbo mate, I know alot of cossie's do smoke on overrun, just watch them at track days and when they are getting cained etc!
I'm with Dan though, if it didn't do it from factory then it shouldn't do it now...
I think Blue Smoke is turbo mate, I know alot of cossie's do smoke on overrun, just watch them at track days and when they are getting cained etc!
I'm with Dan though, if it didn't do it from factory then it shouldn't do it now...
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29-09-2007, 10:35 PM
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Originally Posted by Christian and Beccy
SR20's very rarely have trouble with valve stem seals. Far more likely to be Turbo. 
Can't remember what turbo is has Rob?
Can't remember what turbo is has Rob?
29-09-2007, 11:17 PM
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blue smoke + cossie= bad.
i had the same issues of a small puff of blue smoke on over run that slowly got worse until it was belching blue smoke when sitting idling at traffic lights. most embarrasing.
turned out to be the turbo as when i bought a new t34 from woodford garage the problem stopped. i had already had the piston rings and a recon head fitted previously so was discounting them. ive never seen a cossie yet that didnt puff a little during hard use and people are always telling me not to worry as its not unusual for a cossie but as already said they shouldnt do it if everythings good.
i had the same issues of a small puff of blue smoke on over run that slowly got worse until it was belching blue smoke when sitting idling at traffic lights. most embarrasing.
turned out to be the turbo as when i bought a new t34 from woodford garage the problem stopped. i had already had the piston rings and a recon head fitted previously so was discounting them. ive never seen a cossie yet that didnt puff a little during hard use and people are always telling me not to worry as its not unusual for a cossie but as already said they shouldnt do it if everythings good.
30-09-2007, 11:04 AM
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Originally Posted by jawanne
as above mate valves...does it smoke a bit on start up
I think i'm looking at a new turbo which is a million times better then say the rings as that would mean i'd have to buy some decent forged pistons (as it'd be rude not too) and then while the engine was in bits... some steel rods and a decent headgasket!
30-09-2007, 11:05 AM
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Originally Posted by Dan
Was going to say welcome to Cossie ownership but saw your sig!
I think Blue Smoke is turbo mate, I know alot of cossie's do smoke on overrun, just watch them at track days and when they are getting cained etc!
I'm with Dan though, if it didn't do it from factory then it shouldn't do it now...
I think Blue Smoke is turbo mate, I know alot of cossie's do smoke on overrun, just watch them at track days and when they are getting cained etc!
I'm with Dan though, if it didn't do it from factory then it shouldn't do it now...
30-09-2007, 11:47 AM
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I'm thinking of getting a compression test done, would this prove the rings and stem seals ok?
I cant really afford to be replacing bits if they dont need replacing
I cant really afford to be replacing bits if they dont need replacing
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