BMW M5 Forum and M6 Forums banner

1 - 2 of 2 Posts

·
Registered
Joined
·
187 Posts
Discussion Starter · #1 ·
Anybody heard a hissing sound around the alternator? My 12/99 build M5 has 10000 miles now and has developed this sound that can be heard over the Vanos sound......Quite a cacaphony (Sp)! I think it may be a premature bearing failure. I'm going to wait until the last two lights go off to take it in.
 

·
Registered
Joined
·
320 Posts
Could it be the air conditioning system? I associate "hissing" sounds with air/gas noises. Maybe an exhaust leak? I have heard new, tight rubber belts make sounds that some might describe as "hissing." If it's coming from the alternator area perhaps it is a tight alternator belt. However, I can't imagine a belt being louder than the VANOS...
 
1 - 2 of 2 Posts
Top