gavin18787
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Registered: 22nd Feb 05
Location: Basildon, Essex
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What tests are there to determine which it maybe other then a wet and dry compression test?
I think it maybe my piston rings as it smokes when you first start it up badly (indicating oil seeping through when not in use and then been burnt off) it is then not smokey once warm unless you take it past about 4.5k
Gavin
Drives supercharged Tec with torque  
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Scotty C
Member
Registered: 6th Nov 05
Location: Kidderminster Drives: 1.6 16v Sport
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Compression test
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gavin18787
Premium Member
Registered: 22nd Feb 05
Location: Basildon, Essex
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ive had a wet and dry one done but the results were a bit all over the place 
Drives supercharged Tec with torque
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Scotty C
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Registered: 6th Nov 05
Location: Kidderminster Drives: 1.6 16v Sport
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Might be valve stem seals because as it sits over night, oil seats and goes past the valve stem seals, Hence why it smokes on start up.
Milage?
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Warren G
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Registered: 14th May 06
Location: Kent
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post the results up, compared to my oil burner gsi, which the oil rings were knackered
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Warren G
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Registered: 14th May 06
Location: Kent
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for the amount of oil it burns, it doesn't really show?????
but the engine did get very hot when the head gasket went bare in mind
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gavin18787
Premium Member
Registered: 22nd Feb 05
Location: Basildon, Essex
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 warren was about to u2u you 
When it did get hot what damage could have been done?
Il find the results and post them up in a bit
Drives supercharged Tec with torque
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gavin18787
Premium Member
Registered: 22nd Feb 05
Location: Basildon, Essex
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oh and the amount of smoke it produces is on the increase since i last saw you 
[Edited on 29-07-2007 by gavin18787]
Drives supercharged Tec with torque
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Vaux Lad
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Registered: 15th Dec 04
Location: Stoke-on-Trent
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Compression test wont be effected by valve stem seals.
If wet/dry compression tests gives similar results, its problem the stem seals.
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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done a leakdown test yet?
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corsa-s-wales
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Registered: 6th Apr 07
Location: caerphilly
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my sport is doing the exact same x16xe gota keep topping the oil up,or the engine makes a tapping noise,got mine booked in the garage tomorrow to see wot the problem is.will let you know
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corsa-s-wales
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Registered: 6th Apr 07
Location: caerphilly
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milage on mine is 50k
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Ash_EP3
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Registered: 15th May 07
Location: Melksham, Wiltshire
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quote:
Originally posted by corsa-s-wales
my sport is doing the exact same x16xe gota keep topping the oil up,or the engine makes a tapping noise,got mine booked in the garage tomorrow to see wot the problem is.will let you know
that tapping noise mate is your TAPPETS!!! its just where they have no OIL reaching them! I have that same problem as well buddy on mine... I used a bit of OIL ADDITIVE and that has seemed to work..... for the moment 
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gavin18787
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Registered: 22nd Feb 05
Location: Basildon, Essex
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Here are the results i got on the compression test, not sure how accurate they are as they seem a bit random 
My gsi
Dry 1 2 3 4
240 235 185 240
wet 275 260 270 265
Warrens gsi with piston rings gone
dry 1 2 3 4
210 220 225 210
wet 225 225 250 230
When this test is done is there a set amount of oil that should be added and how long should it be left before taking a wet reading?
Gavin
Drives supercharged Tec with torque
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gavin18787
Premium Member
Registered: 22nd Feb 05
Location: Basildon, Essex
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quote:
Originally posted by Dave A
done a leakdown test yet?
Is that the same as the test above?
Also the head that is on the car at the moment is the ported and polished one i got from you. Did that have new stem seals in it?
Drives supercharged Tec with torque
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Warren G
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Registered: 14th May 06
Location: Kent
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well was my £12 halfords gauge!!
but on my car, the compressions were correct (190psi 1&2 and 200psi 3&4)
but on my gsi and gavins they seem high to me
on the wet compression test it was two squirts of oil in each cylinder
but yes, did seem all over the place
[Edited on 30-07-2007 by warren.g]
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Vaux Lad
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Registered: 15th Dec 04
Location: Stoke-on-Trent
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Leak down test is different.
It holds the pressure in, and shows how much is leaking past valves/rings.
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Warren G
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Registered: 14th May 06
Location: Kent
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no point in doing that, theres no leak, as you can see compressions good???
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Vaux Lad
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Registered: 15th Dec 04
Location: Stoke-on-Trent
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Apart from cylinder 3 having a 3bar pressure difference to the others?
And its closer with a wet test, sounds like worn rings on 3.
[Edited on 30-07-2007 by Vaux Lad]
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Warren G
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Registered: 14th May 06
Location: Kent
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but if the oil ring was worn (causing oil burning) surely the wet test wont go up that high???? its strange how low compared to the others it was, and how much it went up on a wet test
dont the compressions seem high to you? as my 1.4 was reading 190/200psi on the compression test, and i though the 1.6 was the same compression ratio
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Vaux Lad
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Registered: 15th Dec 04
Location: Stoke-on-Trent
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The reading would go up as the oil you put into the cylinder temporarily creates a better seal, hence the higher reading.
Ive never run a compression test on one of these engines, so dont know whats considered normal.
Did you do the test at WOT? I assume so by the readings.
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Warren G
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Registered: 14th May 06
Location: Kent
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nope, didnt touch the throttle!
first time iv actual done a wet test, so just put two (well not very accurate) squirts of oil in each cylinder
but even the dry compression results seem high to me! as im sure standard is suppost to be 200psi
yes but the amount it went up by, was hell of alot!
[Edited on 30-07-2007 by warren.g]
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Vaux Lad
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Registered: 15th Dec 04
Location: Stoke-on-Trent
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Ideally the test needs be done with all 4 plugs out, and the throttle wide open.
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gavin18787
Premium Member
Registered: 22nd Feb 05
Location: Basildon, Essex
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would be interesting to see if it made a difference by leaving the oil in there a little while and then taking a reading. As that would give it more time to leak through.
Drives supercharged Tec with torque
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Warren G
Member
Registered: 14th May 06
Location: Kent
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well all four plugs were out, and dis pack unplugged!!!!!
but tbh i never have the throttle open when i do compression tests at work either
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