Hi all, My 1999 SL2 with 93 K miles DOHC engine is making a noise on the upper passenger side of the engine. The noise is present at idle and at speed engine cold or warmed up. With a mechanics stethoscope I have isolated the grinding noise to the upper right side motor mount where it bolts to the top of the engine with 3 bolts directly over the idler wheel. I can find no info in my Haynes manual for servicing the idler wheel as this is where I think the noise is coming from. Any input would be greatly appreciated.