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[martin42]

the coil packs can give up once removed from engine,both off mine did when i did cam covers last year.

[jonny2112]

What were your symptoms pal?

[Webby the Bear]

Thanks guys.
Plugs all checked and refitted without any problem.
Left it running earlier for maybe ten minutes but no more, and haven't driven it yet. Temp had started to rise so hopefully stat is working.
I'm hoping that any problem with stat or transfer pipe would result in a coolant leak somewhere. So far there is not. Everything else has been redone - inlets and camcovers - but still nothing seemed out of place.
Maybe I'll take it for a run tomorrow evening and see what happens. Scared of it going 'bang' though 

I wouldn't do that if it was mine , if no oil is getting to the lifters . Seem to recall webby's car sounded similar after he did some work on ralf but we never heard if he found the source 

thats right, ralf sounded terrible but to be fair that was due to the exhaust valve/c.shaft timing on bank 1 being out by 5 teeth  i'd still love to know how it got like that 

[Webby the Bear]

just watched your vid jonny.
not an expert but that sounds just like ralf......



BUT.

His timing was ridiculously out and almost certainly had bent exh. valves on bank 1. really struggling to understand how it could sound the same when your timing hasn't been touched 

[jonny2112]

The car was running beautifully before this and I didn't touch the timing, though I had the casing off momentarily.
I really don't understand what's happened. Could always be coincidence and nothing to do with the maintenance, but I can't help thinking its something I've done.

[jonny2112]

Is it possible to check oil pump operation? Or any other ways to check oil circulation? Although I checked that oil was going into the cams, I have no way of knowing if its sufficient or whatever.
Wondering too if oil issues would contribute to the new fault codes.

[05omegav6]

the coil packs can give up once removed from engine,both off mine did when i did cam covers last year.

This usually creates a horrendous misfire, nothing to suggest that yours is misfiring

[albitz]

John,have you tried carefully spraying carb cleaner around possible sources of air leaks in the engine while its running ?

[jonny2112]

John,have you tried carefully spraying carb cleaner around possible sources of air leaks in the engine while its running ?

No I haven't actually. Where would you recommend? Or I guess it could be nearly everywhere!

I'm going to change the oil and filter too, just in case. I haven't got round to the conversion yet so it's still a stupid canister filter.

[albitz]

If that noise is an air/vacuum leak its a big one.I would go the whole wat around the engine and spray little and often in the nooks & crannies,see if the revs suddenly shoot up. be careful near exhaust manifold area.Dont want you losing your eyebrows.

[jonny2112]

Ok mate I'll give that a go too 

Just gave her an oil and filter change, but I don't think it's made any difference 
I didn't run it for very long afterwards, but that shouldn't matter.

[Marks DTM Calib]

Just listened to the video and its miss firing and running on four pots.

Start with the simplestuff, check ALL the connections, start at the rear of the plenum and work round which should be.

Large breather pipe
Carbon cannister vent pipe
Small breather pipe
Large breather pipe
Rear multiram connector
Injector multiplug
2-4-6 bank ignition module (make sure its FULLY home)
Crank (would not be running but lets be complete)
Main manifold vac pipe (to brake servo)
Cam sensor
Bank 2 knock sensor
Throttle valve plug
Front multiram plug
Bank 1 knock sensor plug (mounted on cam cover cable tray)
MAF plug

[Andy H]

the coil packs can give up once removed from engine,both off mine did when i did cam covers last year.

This usually creates a horrendous misfire, nothing to suggest that yours is misfiring

Codes are saying misfire

New -
P0325 Knock sensor 1 circuit high input (Bank 1 or single sensor) or  Knock sensor 1 circuit low input (Bank 1 or single sensor)
P0330 Knock sensor 2 circuit high input (Bank 2) or Knock sensor 2 circuit low input (Bank 2
0300 Random/multiple cylinder misfire detected
0301 Cylinder 1 Misfire Detected
0304 Cylinder 4 Misfire Detected

[jonny2112]

Just listened to the video and its miss firing and running on four pots.

Start with the simplestuff, check ALL the connections, start at the rear of the plenum and work round which should be.

Large breather pipe
Carbon cannister vent pipe
Small breather pipe
Large breather pipe
Rear multiram connector
Injector multiplug
2-4-6 bank ignition module (make sure its FULLY home)
Crank (would not be running but lets be complete)
Main manifold vac pipe (to brake servo)
Cam sensor
Bank 2 knock sensor
Throttle valve plug
Front multiram plug
Bank 1 knock sensor plug (mounted on cam cover cable tray)
MAF plug

Will do. Not sure where all the parts are, but I'll go round them in order as best I can. Then I'll get the carb cleaner out too 

[Andy H]

So,where does the oil come up to feed the cams ? Its not just the bearings which recieve oil,the whole area inside the cam covers swims in oil when the engine is running,to keep the lobes lubed.Thats the critical thing for Jonny.If it is near the half moons as Robson suggested then close inspection around there seems like the next thing to do.
I must say I feel really sorry for the bloke.Its obvious by the length of the thread that we are all trying our best to help,but due to his location its not a matter of someone knowledgeable going and having a look at it for him.Must be very frustrating indeed.
Then again,he doesnt have to live among all you English people.

Sorry, didn't address this Q at the time.
Many ohc engines have oil jets directed at the cam lobes to lubricate them. From what I can see the V6 relies on oil spilling out of the camshaft bearing caps to lubricate the cam lobes. Being careless with the sealant couldn't block that oil flow.