In process of trying to remove the 13mm headed bolt that attaches the belt tensioner/idler assembly pulley on the left bank of my 2003 XK8 North America Coupe. It is extremely tight and would like to insure that it is a LHT or turn to left to loosen bolt. My 1/2" drive pull handle move it will not move it to left. Do not want to break it. My previous research indicated the bolt (15mm) for the idler pulley on this assembly is the RHT bolt and has to turn to right to loosen. Am I correct? Which direction does one turn the 13mm head bolt to loosen? Should this bolt not release, the pulley checks good and will probably leave it as is. Was planning to install new bearing in the idlers. Please confirm the correct direction to loosen the 13mm bolt?

 

The M10 (13mm head) is a normal bolt. (as is the idler near the alternator)

 

Thanks Bob. Since it was so tight, I questioned if possibly I was incorrect on direction. Probably use a 6 point socket and pull handle and try a bit. Do not plan to break it since the pulley checks OK. No slack in nay direction or noise.

 

RESOLVED, successfully with a 6 point 13mm socket and LARGE pull handle. Bolt loosened in standard direction as Bob advised. Thanks again everyone.

 

Well done, and thanks Bob....