radiator fluid on serpentine belt

[hpcaub]

My 135i burst a hose and I'm in the process of replacing it. The blown hose was the radiator "ventilation line" that goes from the upper radiator hose to the overflow tank. I chose to replace the mickey mouse flange with a Rein aluminum flange while I was in there and it was a good idea, as it crumbled when I removed it.

My question is about the serpentine belt. I had a lot of radiator fluid spraying under the hood when the hose burst. Do I need to replace the serpentine belt due to the radiator fluid spraying around?

It's a project that I don't really have time for, but will do it if it avoids future problems.

Thanks

[Almuliman]

If you're in there anyway and you don't know when the belt and tensioner were last replaced, you should probably just do it. Even if you've buttoned the rest of it up – it doesn't take long and is cheap insurance. IMO.

[AshwinLB]

If you don’t have a crankseal guard, I would definitely replace it

[hpcaub]

Thanks for the input. I replaced the serpentine belt, wiped down all the surfaces to remove most of the coolant and checked that all the pulleys and tensioners were turning smoothly. I hadn't heard of a crankseal guard before, but I'll look into that the next time I have to take apart this part of the car.

My serpentine belt had a different routing than expected but once I figured that out, it was a pretty easy install.

[Almuliman]

Originally Posted by AshwinLB

If you don’t have a crankseal guard, I would definitely replace it

Huh, didn't know about those either, e.g., https://www.babybmw.net/threads/bmw-...-guard.134936/. Looks like they may be for N5x, just N54/N55. In any case, they exist for the N51/52.