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[Kevin Wood]

While the cam cover's off, try to push the top of each lifter down with a bit of wooden dowel or similar. If you can compress any, or if there's a considerable clearance in the first place, it might point to a lazy lifter.

[JamesV6CDX]

While the cam cover's off, try to push the top of each lifter down with a bit of wooden dowel or similar. If you can compress any, or if there's a considerable clearance in the first place, it might point to a lazy lifter.

I have done that - they are all solid

[JamesV6CDX]

I booked today off work to play cars

I've fitted a set of known good lifters to the 2-4-6 side where the noise originated from

I cleaned them out as per the guide.

She was very noisy for 20 mins but now idling silently and has been ticking over smooth as silk for the last 40 minutes

There is a slight noise which sounds somewhat like a belt rub which was there before. It may be because all the belts and pulleys are new, as they are fitted correctly.

I guess the real test will be the next cold start.

I did take a picture of that rough edge, I will upload it v soon

[JamesV6CDX]

Started from cold today

Sweet as a peach for 7 minutes, then the dull "knock knock knock knock knock knock" crept back in...

It seemed to take longer to come and not be quite as loud.

But it's still there.

This is the first time I've run it from cold since 3 back to back oil changes....

I have had a thought.

The Cambelt kit is the one fitted to the old engine when it seized

Clearly I fitted a brand new belt but the rollers were on the old engine when it seized

The feel absolutely fine by hand.... But I wonder??

I totally believe Joff of course that the block was quiet before.

Valve train seems fine??

Hmmmmmmmmm

[Rods2]

For peace of mind is it worth checking oil pressure?

[JamesV6CDX]

I will

This is how she sounds now, video below

All I have done is

1) lifters on 246 bank all changed for known good used ones

2) Oil and filter x 3 (I basically dropped oil, ran for an hour, dropped oil, ran for an hour, dropped oil one last time and refilled.

You can hear it's noticibly quieter

http://youtu.be/f1AUB6zaEj0

Thoughts please

[JamesV6CDX]

To add, there is still a trace of the noise. But it really is a trace compared to before!!

[EMD]

Loose/blown exhaust manifolds sound like that 

[Sir Tigger KC]

That's a big difference! 

[JamesV6CDX]

It's totally not manifolds, I can assure you

It does sound better eh? Not 100% though!

[Nick W]

Have you checked that the sump and, particularly, the oil pickup are clear?

[JamesV6CDX]

Have you checked that the sump and, particularly, the oil pickup are clear?

Yes yes

[JamesV6CDX]

[Andy H]

Signs of 'pick up' on the bearing face ? due to lack of oil? 

The random beating with a blunt object is puzzling

[JamesV6CDX]

Indeed. That has always been there in my ownership even when the heads were on my 3.0

It does look as if something has broken off where the very front of the inlet camshaft sits though