Ok here goes.

I have a Disco II with a knock (not a tick).

Symptoms:
-owned the Rover for 20k miles, just started having issue
-starts after engine warms up
-under no load it gets worse when I rev engine
-while braking, in drive, and reving (adding load) completely goes away

Whats causing it?

Using 15w40 oil (as per landroversonly.com advice).
Last oil change was 300 miles ago (no metal flakes).

thanks all

 

You got a camera that can record and upload video (w/sound) to youtube or something?

 

Definitly doesn't sound like rod knock, or it would get MUCH worse under load and/or rpm increase.

I would say either something is loose and moving around or you got a bad catalytic converter.

 

i had a simular knock and it turned out to be my drivers side cat knocking on the side of the frame.. It is close anyway and needed to have a guy at the muffler shop heat up and pry over. Was fixed..

Chris

 

thanks, I'll take a look down under after work today. I was hoping/thinking is wasn't a Rod noise. My check engine light just came on and I'd bet its one of the o2 sensors before the CAT. Had an issue with is running rich and carbonizing a plug set just before last oil change too.

 

Stop driving it. How mechanical are you.
The longer it knocks, the more it will cost to repair.

 

Been sitting since the day it started knocking (no road time on knock). I have other cars. I am fair at most DIY as long as its in the RAVE pdf

 

Bad cats.

 

Saying that doesn't work as well as it does with dogs. Cats just don't care.

 

Laugh out loud!