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Author Why oh why = Bent Valves
Iain M
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Registered: 18th Aug 05
Location: Wigan - Drives 272bhp corsa ZLET
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   17th Oct 07 at 08:46   View User's Profile U2U Member Reply With Quote

Insulation tape on the head. The garage has just phoned me and informed me what they have found.

[Edited on 18-10-2007 by Iain M]
CORSA NUT
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Registered: 3rd Aug 01
Location: Wirral
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17th Oct 07 at 08:48   View User's Profile U2U Member Reply With Quote

To keep the gasket in place??
Iain M
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Registered: 18th Aug 05
Location: Wigan - Drives 272bhp corsa ZLET
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17th Oct 07 at 08:50   View User's Profile U2U Member Reply With Quote

What and then leave it on there when the head is on??
Kurt
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Registered: 23rd Oct 05
Location: Hi
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17th Oct 07 at 08:51   View User's Profile U2U Member Reply With Quote

weight saving, by not having headbolts?

Edit:

oh wait, was it between the head, gasket and block?

[Edited on 17-10-2007 by Kurt]
Iain M
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Registered: 18th Aug 05
Location: Wigan - Drives 272bhp corsa ZLET
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17th Oct 07 at 08:56   View User's Profile U2U Member Reply With Quote

yes it was exactly where the compression was fluctuating on cylinder 2
TheCam
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Registered: 16th Mar 07
Location: Kirkcaldy
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17th Oct 07 at 09:19   View User's Profile U2U Member Reply With Quote

where exactly was the tape?
Iain M
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Registered: 18th Aug 05
Location: Wigan - Drives 272bhp corsa ZLET
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17th Oct 07 at 09:26   View User's Profile U2U Member Reply With Quote

Stuck on the head next to Cylinder 2. This causing a gap as the head was lifted where it was.
TheCam
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Registered: 16th Mar 07
Location: Kirkcaldy
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17th Oct 07 at 09:32   View User's Profile U2U Member Reply With Quote

so it was sortof.

head
gasket
tape
block.

in that order? was the tape protruding into the cylinder or just making a gap in the gasket? why would someone do something so stupid lol
Iain M
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Registered: 18th Aug 05
Location: Wigan - Drives 272bhp corsa ZLET
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17th Oct 07 at 09:39   View User's Profile U2U Member Reply With Quote

From what he said it was

Block
Gasket
Tape
then the Head

Don't think it was protruding into the cylinder just making a gap which has got worse over time. Would this explain the tapping noise then? Gonna ask previous owner have they had the head off at any time.
TheCam
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Registered: 16th Mar 07
Location: Kirkcaldy
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17th Oct 07 at 09:47   View User's Profile U2U Member Reply With Quote

where was the tapping noise coming from? i wouldnt have thought that would cause a tapping noise.
deanmcreynolds26
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Registered: 15th Sep 03
Location: E46 //M3
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17th Oct 07 at 09:54   View User's Profile U2U Member Reply With Quote

would really need to be a lot of tape for it to cause compression problems surely!

cause once the head is torqued down it shouldve squashed it pretty tight into the gasket..

But still anyway... bunch of cowboys ehh
Mike GSi
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Registered: 3rd Jan 07
Location: Ipswich, Suffolk Drives:Astra VXR
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17th Oct 07 at 10:03   View User's Profile U2U Member Reply With Quote

Iain.... ive had the head off to do the head gasket. i used copper grease to keep the gasket in place. the only thing i can think of is if a piece of tape off a wiring harness got jammed between, if its losing compression it sounds like it could be a slightly bent valve....that would also explain the tapping.
Iain M
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Registered: 18th Aug 05
Location: Wigan - Drives 272bhp corsa ZLET
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17th Oct 07 at 10:17   View User's Profile U2U Member Reply With Quote

No worries mike He has haad a look at the valves and piston rings and all is well there. He did say though that as the head gasket has got more solid over time it would have pushed up a bit if that makes sense. Just seems funny that where the tape was is right next to the cylinder thats playing up. Cheaper bill i hope
Iain M
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Registered: 18th Aug 05
Location: Wigan - Drives 272bhp corsa ZLET
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17th Oct 07 at 10:18   View User's Profile U2U Member Reply With Quote

The tapping comes from sort of the head area.
ainsley_brader
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Registered: 24th Mar 02
Location: Tattershall, Lincolnshire
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17th Oct 07 at 19:21   View User's Profile U2U Member Reply With Quote

i cannot see a piece of insulation tape causing a problem
CorsAsh
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Registered: 19th Apr 02
Location: Munich
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17th Oct 07 at 19:36   View User's Profile U2U Member Reply With Quote

Tapping could be a buggered exhaust gasket.
Ben ev
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Registered: 23rd Oct 05
Location: kingslynn / torquay
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17th Oct 07 at 19:40   View User's Profile U2U Member Reply With Quote

i imagine the head was put on the bench and picked the tape up there, then it was put onto the block without matey boy realising the cock up he'd just made
Iain M
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Registered: 18th Aug 05
Location: Wigan - Drives 272bhp corsa ZLET
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18th Oct 07 at 13:38   View User's Profile U2U Member Reply With Quote

UPDATE -

Well garage just phoned me and when the company who is skimming the head for them has gone to do this they have found 2 bent valves in cylinder 2. This explaining the compression issue. More money

I go on fucking holiday next week and this is hitting my spend hard
Mertin
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Registered: 12th Oct 05
Location: Scotland
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18th Oct 07 at 13:40   View User's Profile U2U Member Reply With Quote

Whats all involved now? Replacing the two valves or alot more?
Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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18th Oct 07 at 13:41   View Garage View User's Profile U2U Member Reply With Quote

so the tape wasnt really causing any harm then
Iain M
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Registered: 18th Aug 05
Location: Wigan - Drives 272bhp corsa ZLET
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18th Oct 07 at 13:42   View User's Profile U2U Member Reply With Quote

they thought it was and its probably been involved somewhere. I know fuckall about engines so..... just passing on whats been said to me.
Iain M
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Registered: 18th Aug 05
Location: Wigan - Drives 272bhp corsa ZLET
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18th Oct 07 at 13:45   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Mertin
Whats all involved now? Replacing the two valves or alot more?


Well they are going to check the others but as compression is fine in the other 3 cylinders i think they are just going to replace the 4 in cylinder 2. and carry on with what they where doing.
Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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18th Oct 07 at 13:53   View Garage View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Iain M
they thought it was and its probably been involved somewhere. I know fuckall about engines so..... just passing on whats been said to me.


cant see it myself
Iain M
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Registered: 18th Aug 05
Location: Wigan - Drives 272bhp corsa ZLET
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18th Oct 07 at 14:03   View User's Profile U2U Member Reply With Quote

I am starting to think that way also TBH.
JonnyJ
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Registered: 23rd Sep 05
Location: Scotchland
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18th Oct 07 at 14:21   View User's Profile U2U Member Reply With Quote

Harsh, i know all about this! At least it wasnt all 16 like mine Iain!

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