Doesn't look like anyone commented.
are you talking about the Crankshaft Pulley ?

On 8/30/2012 3:14 AM, Bob Anderson wrote:
> Hello,
> I have a 1986 Vanagon 2.1 engine and last night the main pulley disconnected. It appears the bolt backed out.
> As I was driving along I noticed the battery light came on and the engine temp and when I pulled over and looked inside the engine was overheating and the main belt pulley had backed out and the belts were no longer doing there job.
> I able to tightened the bolt back in, however when I started the engine and then came back to look the bolt had come back out.
> Needless to say I had to have it towed home and by that time it was late so tonight after work I plan on having a closer look at it. Wondering if anyone has anyone ever experienced this?
> Last week it was axle bolts and this week engine pulley bolts...I'm certainly getting to know the vehicle.
> I'm new to vanagons and this discussion forum is a big help!
> Thanks,
> Bob A
>