M97 engine noise - need help diagnosing it w/audio

[1point7bar]

IIRC Caymans have dual concentric tappets as part of the variocam system.

These are fancy piddle valve lifters.

The cam chains also use a similar device for tension.

If a PTFE friction enhancer (Wynns supercharge etc) does not cure it, I regret to tell you that you could need a new cam follower or chain tensioner.

The relevant cam shaft has to be removed to replace the tappet.

[1point7bar]

Oil thins as it is heated.

[1point7bar]

I have changed alot of modern multi grade oils.

Hot & cold.

[BertBert]

ChimpanZed said:

Modern multi-grade oils have viscosity modifiers that makes them thicken as they heat.

Oh no, not again.

[Matt Seabrook]

BertBert said:

ChimpanZed said:

Modern multi-grade oils have viscosity modifiers that makes them thicken as they heat.

Oh no, not again.

Lol looks like the post has been pulled.

[steve singh]

The OPs posts have all been deleted - how strange.

Guy does oil change - car starts making a noise - perhaps a warranty claim is coming and he didn't want any evidence