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[tunnie]

8Nm is barley nipped, its so low its very hard to judge by hand. Was the torque wrench faulty? 

[jonny2112]

I think it must be faulty. Knew I shouldn't trust it.

Miss2112 has uploaded the noise .....

http://www.youtube.com/watch?v=lmzZ3V5-VYg

Hope the link works, as it'll give you an idea.

[amba]

That doesn,t sound like anything metalic has dropped inside the negine to me.

Have you checked the small rubber hose join on the SAI tube that runs just by the o/s coolant transfer pipe for a split...that noise sounds more like manifold or exhaust related from the clip

[jonny2112]

Thanks amba. That would tie in to the fault code too.
I haven't found anything disconnected, but I'll start checking for damage / splits too 

[amba]

That noise does sound more like an exhaust blow or similar....I really doudt that is anything inside engine or cam covers.

That short peice of black hose joining the 2 peices of the SAI pipework would make a similar noise if it had a split...seem to remember somebody replaced manifold gasket only to find it was the pipe that had a split in it.Should be able to feel a definite blow if you carefully feel around it whilst engine is running...be carefull though as pipes are hot 

[albitz]

I wouldnt like to say tbh.Sounds just like my diesel cavalier.Hopefully one of the experts will recognise the problem from the soundtrack.

[RobG]

That short peice of black hose joining the 2 peices of the SAI pipework would make a similar noise if it had a split

2.6, no SAI

[albitz]

Is it definitely running on both banks ? Its almost as if its only running on one.

[omega3000]

Sounds metallic , is the oil low 

[robson]

isnt that a tappety noise not sure of the construction but are there lifters or hydraulic tappets which are not getting lubricated

[jonny2112]

There was an oil leak, but the oil has been topped up. Left it running for a while but no change. Maybe needs run for longer? But it does sound tappety!
Sounds like its coming from the plenum but there's nothing in there really. I didn't physically check it though. Mmmm.
Be a nightmare trying to find a split pipe if that's what it is 

[jonny2112]

Is it definitely running on both banks ? Its almost as if its only running on one.

How could I test this? I had thought fault code may have thrown some light on that?
Worth disconnecting one of the coil packs at a time?

[robson]

Looking at engine construction under the cams are followers and a" hydraulic valve adjustment mechanism" are the followers getting the oil they require. Something blocked by disturbed muck.

[albitz]

Is it definitely running on both banks ? Its almost as if its only running on one.

How could I test this? I had thought fault code may have thrown some light on that?
Worth disconnecting one of the coil packs at a time?

That would work.If disconnecting one doesnt make any difference then youve narrowed things down.Im only thinking out loud though.Im not an expert by any stretch.

[jonny2112]

I'll maybe give that a go. Can't do any harm.
Bit late now though and working over the weekend