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[Derek_in_Penzance]

Hi guys, update on my emissions problem on the rebuilt 3.0 engine 
The weird thing is that it passed on emissions on Nov 2022 then lay idle for a  couple of months awaiting welding for the MOT. Upon re-testing in Mar h the CO level was way too high, 8%  (see my earlier posts explaining it all).

Here is the engine that was rebuilt. It sounds wrong compared with a 3.2 Elite engine which follows. The strange whooshing noise seems to be coming from the right side of the engine (as you sit in the car). It's as if something is rubbing. 

https://www.youtube.com/shorts/78Ar5M03_ZE

Here is the 3.2 engine:

https://www.youtube.com/watch?v=p7Gmb8ZDU3s
It has only done about 83,000 miles

Anyway I am looking at a worst case scenario in which the 3.0 engine is fundamentally damaged in some way and needs replacing.
Is is possible to use the 3.2 basic engine and fit it into the 3.0 pre-facelift car, ie retain block,cylinder heads, timing belt etc  etc and just change the plenum chamber, injectors?, throttle body and other peripherals.

[Doctor Gollum]

The only things you need to swap over are the loom, dis pack and throttle body. And plenum unless you want to delete the egr.

No need to do anything else except perhaps renew the timing belt.

That said with the audio on those videos is impossible to tell what's making a noise and what isn't  The second engine sounds quieter but the video volume is about half that of the first one.

It could be anything on the driver's side of the engine... Alternator, cambelt tensioner, egr valve, exhaust leak.

A compression test might be a start. And does unplugging the egr valve change anything?

[Kevin Wood]

Going back a step or two... Compression results that differ from one bank to the other speak of one bank that's got the wrong cam timing. An easy thing to check before stripping it down.

[Derek_in_Penzance]

Hi all, thanks for the suggestions, I will check them out.