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[Kevin Wood]

... and, I suppose, as we're starting at the beginning, try it with the aux. belt removed in case it's an ancillary? I'd be surprised, but eliminate it anyway.

Worth checking for lost motion at TDC while You've got access to the crank pulley too?

Kevin

[TheBoy]

That sounds like a heavier noise to me, but difficult to tell, TBH.

Worth trying cutting each cylinder on Tech 2?

Is it still running on 6? Certainly sounds like it is. :-/

If you pull the crank sensor and turn it over on the starter is there any knocking?

Kevin

I thought it sounded more serious that MV6, which is why I immediately went for cambelt - particularly as when it happened, I lost servo assistance for brakes, and then I couldn't restart. Attempts to restart, I reckoned it was spinning over a bit to easily.

[TheBoy]

... and, I suppose, as we're starting at the beginning, try it with the aux. belt removed in case it's an ancillary? I'd be surprised, but eliminate it anyway.

Worth checking for lost motion at TDC while You've got access to the crank pulley too?

Kevin

Put it all back together to take the video.  Unsure of this car's future to be honest - whatever, I'll probably pop the camcovers off to get the (3l) cams out, as they have value , might 'play' and check followers whilst there, rip heads off etc, but doubt it will go back together

[Grrrrrr]

A bit beyond my ken but you said you reckoned it span too easily ... presumably due to a loss of compression? I.e. valve(s) not moving?

[Martin_1962]

I had a cam jump 180 degrees, that foxed me until I took the pulleys off

[Kevin Wood]

Did it have plenty of oil in when it failed? Just thinking, you implied a bit of playing happened shortly before? High revs / high G scenario might have caused it to take a gulp of air if oil level was low, thus emptying lifters. :-/

Hard to see how it could lose vacuum / compression and then run happily albeit noisily with cam timing fine throughout. :-/

Don't suppose one of the cam sprockets has turned on the cam - although they are should be keyed to each other?

Kevin

[TheBoy]

Did it have plenty of oil in when it failed? Just thinking, you implied a bit of playing happened shortly before? High revs / high G scenario might have caused it to take a gulp of air if oil level was low, thus emptying lifters. :-/

Hard to see how it could lose vacuum / compression and then run happily albeit noisily with cam timing fine throughout. :-/

Don't suppose one of the cam sprockets has turned on the cam - although they are should be keyed to each other?

Kevin

Oil still reading pretty much max, dark brown in colour, so due a change.

[Martin_1962]

Did it have plenty of oil in when it failed? Just thinking, you implied a bit of playing happened shortly before? High revs / high G scenario might have caused it to take a gulp of air if oil level was low, thus emptying lifters. :-/

Hard to see how it could lose vacuum / compression and then run happily albeit noisily with cam timing fine throughout. :-/

Don't suppose one of the cam sprockets has turned on the cam - although they are should be keyed to each other?

Kevin

I had a key work out

[Entwood]

If the lifters got "emptied" through "exuberant" driving .. wouldn't they just fill back up fairly quickly once restarted

 :-/ :-/

[Kevin Wood]

If the lifters got "emptied" through "exuberant" driving .. wouldn't they just fill back up fairly quickly once restarted

 :-/ :-/

They can take a few minutes IME.

Noise sounds more serious although I'm aware that I've said that before recently and (hopefully) been proved to be overly pessimistic.

Kevin

[Andy B]

Sounds to be more serious that 'tappets' to me too. But not heavy enough though for big ends either.  :-/

[manny]

Sounds like the little end nocking to me. I had a V6 ford years ago with damaged small end . That noise sound the same to me.

[TheBoy]

Tech2 has pinpointed the issue to cylinder 6 which appaers not to be firing.

Cam timing spot on.

HT lead for No6 is just under 4k ohms, as are all the others, except No3 which seems odd.

Skinned my hands removing the DIS, that measures OK as well.

Plugs replaced as a matter of course.  Plug 6 was darker, but complete.

[Lazydocker]

Hmm... So wiring to dispack?  :-/ Certainly smells like there's fuel getting there

Or inlet lifters... Although seems far too coincidental

[Marks DTM Calib]

When you collect the silver nugget, you can borrow my spark tester...and compression tester