Thanks everyone. I really appreciate it.

 

I am interested in hearing what the dealer says about the RRRR/grinding sound. It happens on my 2001 Disco when I start it up, but before I put it into gear. I haveno idea what could be causing it!

 

I had/have a similargrinding sound in my 99 disco IIand my mechanic says it's the idle pulley that needs to be replaced. Cheap and easy fix..... could be the same problem?

 

My pulley is new, so can't be that for me.

 

Do you see any metal shavings in the oil when you drain it?

Willie

 

The noise you are hearing is most likely coming from the fan for the secondary air system, pretty common for those who have the emission device on your truck, Look for the fan type device located on the passenger side of the fire wall, that is you problem. Most likely it is normal and not broken, they usually are noisy, some more then others and replacing it won't also make the noise go away.
If you need help with bleeding the coolant system call me. Make sure you only use DexCool coolant when adding to the coolant bottle.

 

Has anyone confirmed what is the cause of the RRRRR or Grinding sound every 7-10 seconds? My 2001 disco has been doing it since I got it 2 years ago, but I seems to be doing it more now. I am concerned that something is about to break...

Thanks

 

Check the idler pulley next to the tensioner pulley. If it is plastic and not steel, then replace it. There is a revised idler pulley(steel) due to a similar kind of sound(bearings in plastic pulley failing due to wear on the pulley drive surface). The pulley is about $50 and takes about 10-15 minutes to replace(with the necessary tools). If it is steel then this is not the cause of your issue.