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Author Arden GSi
wyley
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Registered: 2nd Jun 12
Location: Ireland
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13th Jun 12 at 20:03   View User's Profile U2U Member Reply With Quote
Wow your car look class man
If hope mine comes out of the bodyshop Lookin somewhat decent
shaunmods
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Registered: 12th Mar 07
Location: Glascote, Staffordshire
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13th Jun 12 at 20:18   View Garage View User's Profile U2U Member Reply With Quote
One thing that did cross my mind was that the rings might not have bedded in properly? I dont think semi-synthetic oils are meant to be used for running in

Or it could just be burning off the oil used when you assembled it maybe? Mine smoked a bit after I rebuild the head because I oiled the cylinders to stop them rusting while it was off.

Martin W
Organiser: South East
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13th Jun 12 at 20:21   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by wyley
Wow your car look class man
If hope mine comes out of the bodyshop Lookin somewhat decent


thanks
Martin W
Organiser: South East
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13th Jun 12 at 20:23   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by shaunmods
One thing that did cross my mind was that the rings might not have bedded in properly? I dont think semi-synthetic oils are meant to be used for running in

Or it could just be burning off the oil used when you assembled it maybe? Mine smoked a bit after I rebuild the head because I oiled the cylinders to stop them rusting while it was off.



i see what your saying but i'd driven just over 200 miles before it started smoking, if they havent bedded in properly , how has the oil got up the channels for the sparks and all over the top of the head? im praying its the gasket , im not taking it back out!

could oil travel down past the spark plug onto the piston though?
shaunmods
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Registered: 12th Mar 07
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13th Jun 12 at 20:28   View Garage View User's Profile U2U Member Reply With Quote
I think its probably two seperate problems Martin Oil in the spark plug well sounds like a leaky rocker cover gasket as Jamie said. This wouldnt cause it to smoke though because the oil wouldnt be able to get down into the cylinders
Martin W
Organiser: South East
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13th Jun 12 at 20:33   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by shaunmods
I think its probably two seperate problems Martin Oil in the spark plug well sounds like a leaky rocker cover gasket as Jamie said. This wouldnt cause it to smoke though because the oil wouldnt be able to get down into the cylinders


thats exactly what i didnt want to hear

just gonna drive it some more with a new rocker gasket, see if it does it again or not
daine
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Registered: 28th Feb 07
Location: rossington
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14th Jun 12 at 15:33   View Garage View User's Profile U2U Member Reply With Quote
Hi Martin, sorry to bring more bad news but first, on your silicone inlet pipe were`s the temp sensor??
Martin W
Organiser: South East
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14th Jun 12 at 21:37   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by daine
Hi Martin, sorry to bring more bad news but first, on your silicone inlet pipe were`s the temp sensor??


the temp sensor is on the bottom of the hose just the like the standard ones are
daine
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Registered: 28th Feb 07
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14th Jun 12 at 22:30   View Garage View User's Profile U2U Member Reply With Quote
Think you need to do a compression test Martin, got a feeling head gasket might have
gone again sorry mate!! but to do 180 miles and no smoke, then it starts burning
oil and smoking.
the white smoke is over fueling due to lambda reading low oxygen content, due to oil in cylinders
but it don`t look good.
Martin W
Organiser: South East
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14th Jun 12 at 22:36   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by daine
Think you need to do a compression test Martin, got a feeling head gasket might have
gone again sorry mate!! but to do 180 miles and no smoke, then it starts burning
oil and smoking.
the white smoke is over fueling due to lambda reading low oxygen content, due to oil in cylinders
but it don`t look good.


The oil looks perfectly fine still the correct colour no mayo in oil etc?
Corsa_Sport21
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Registered: 13th Apr 08
Location: Leven, Fife. Drives : 205 GTi
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14th Jun 12 at 22:41   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by daine
the white smoke is over fueling due to lambda reading low oxygen content, due to oil in cylinders
but it don`t look good.


White smoke = water.
Black smoke = fuel.
Blue smoke = oil.

Just for future reference.
Martin W
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14th Jun 12 at 22:45   View User's Profile U2U Member Reply With Quote
Thats what I thought , Its black then blue
sam-6
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Registered: 18th Nov 09
Location: Totnes, devon
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16th Jun 12 at 13:29   View User's Profile U2U Member Reply With Quote
i saw this at PVS! great car, looks boss!
Martin W
Organiser: South East
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16th Jun 12 at 13:42   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by sam-6
i saw this at PVS! great car, looks boss!


Thanks mate
daine
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16th Jun 12 at 14:00   View Garage View User's Profile U2U Member Reply With Quote
Sorry Martin, I ment black smoke, it had been a long day,Cheers corsa_sport21
for correcting me
daine
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16th Jun 12 at 14:06   View Garage View User's Profile U2U Member Reply With Quote
You done a compression test yet mate??
Martin W
Organiser: South East
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16th Jun 12 at 14:50   View User's Profile U2U Member Reply With Quote
Yes all came in at around 200 psi
Martin W
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18th Jun 12 at 21:43   View User's Profile U2U Member Reply With Quote
18/6

so for the last few days ive been doing a lot of investagating and reading along with my dad to try and find the cause of the blue smoke. as you know we did a compression test, this is how the spark plugs are, all oily:

and this was the state of the compression tester!



after hours and hours of reading, i went down to see my local engine builders, Haynes engineering (we had a rolling road there recently). after chatting for a while, we got talking about how we put the piston rings in. we then realized that my honing was more round instead of chriss cross as its suppose to be:

this is mine:



and this is how its supposed to be:



as you can see from the last pic, the honing is not round like mine is. i'm hoping this is the cause of the blue smoke.

what do you think?
daine
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18th Jun 12 at 21:57   View Garage View User's Profile U2U Member Reply With Quote
Think its a long shot Martin, yours don`t look that bad, when you fitted the ring mate! did
you gap them first in the bores, then space the gaps around the piston?? on the compression
test did you get higher than normal readings? if so this shows its rings, the oil seals the piston
better therefore heightening the reading.
shaunmods
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Registered: 12th Mar 07
Location: Glascote, Staffordshire
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18th Jun 12 at 21:58   View Garage View User's Profile U2U Member Reply With Quote
Just thinking out aloud here mate but I've just looked back at the photos of before and after honing it looks like you've taken quite a bit off the bores. You didnt happen to measure the ring gaps after honing did you? Possibily overbored it maybe?
Martin W
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18th Jun 12 at 22:08   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by daine
Think its a long shot Martin, yours don`t look that bad, when you fitted the ring mate! did
you gap them first in the bores, then space the gaps around the piston?? on the compression
test did you get higher than normal readings? if so this shows its rings, the oil seals the piston
better therefore heightening the reading.


right silly question: what do you mean gap the bores then space the gaps around the piston?

it came out at around 200 psi which i did think was high yes
Martin W
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18th Jun 12 at 22:10   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by shaunmods
Just thinking out aloud here mate but I've just looked back at the photos of before and after honing it looks like you've taken quite a bit off the bores. You didnt happen to measure the ring gaps after honing did you? Possibily overbored it maybe?


what do you mean measure the ring gaps? and i hope i haven't taken too much off or that means a new bottom end doesn't it? it ran fine for 200 miles before it smoked so i would have thought if id over-bored them it would have smoked from the beginning?
shaunmods
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18th Jun 12 at 22:16   View Garage View User's Profile U2U Member Reply With Quote
quote:
Originally posted by deadliner
what do you mean measure the ring gaps? and i hope i haven't taken too much off or that means a new bottom end doesn't it? it ran fine for 200 miles before it smoked so i would have thought if id over-bored them it would have smoked from the beginning?


Putting a new ring into the bore and checking how big the gap is to see if its within the tolerances. Like this -



But yeah it does sound wierd how its only just started though
Darryl H
Organiser: South Central
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Registered: 19th Nov 09
Location: Camberley Drives: Porsche 944
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18th Jun 12 at 22:20   View Garage View User's Profile U2U Member Reply With Quote
Surely if it's overbored then new rings would wear and then cause blue smoke?

You wouldn't need a new bottom end, new oversized pistons and rings though

[Edited on 18-06-2012 by Darryl H]

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Martin W
Organiser: South East
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18th Jun 12 at 22:23   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by shaunmods
quote:
Originally posted by deadliner
what do you mean measure the ring gaps? and i hope i haven't taken too much off or that means a new bottom end doesn't it? it ran fine for 200 miles before it smoked so i would have thought if id over-bored them it would have smoked from the beginning?


Putting a new ring into the bore and checking how big the gap is to see if its within the tolerances. Like this -



But yeah it does sound wierd how its only just started though


nope haven't done anything like that!

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