OSI550i

Hey guys. I was wondering if someone have any information about the torque specs for the pulley if i took it out and replace it with a new one for my 2008 550i N62 engine ?

OSI550i

I have installed the new alternator with the new pulleys as well as the belts ! However, when i first started the car the squeaking sound was LOUD ! Do you think guys it's from the torque that i have not get it right or the alignment was wrong ! any thoughts ?

OSI550i

JUST WANTED TO UPDATE FOR PEOPLE WHO HAVE THE SAME CAR AS ME AND WANTED TO DO THE TORQUE SPEC FOR THE TENSION IF YOU ARE PLANNING TO CHANGE IT HERE IS THE EMAIL I GOT FROM FCB EURO :
Hello.

Thank you again for your patience while I worked on your request. The specific torque needed is 38Nm. If you have any questions regarding this information, please feel free to reach out to our products department. They are always happy to help with technical information, and may be reached at products@fcpeuro.com.

Warm Regards,

Tiffanie Hrabe

Customer Service Advisor

FCP Euro
Quality & Service, Guaranteed for Life

HOPE THAT HELPS

seanjordan20

I have never used factory specs when torquing. It might be wrong but after 15 years I have never had a problem. Squeaking usually comes from either a bad belt alignment or needing to be tightened/loosened depending on what type of tensioner you have. I think these are auto adjusting could be wrong so it would have been the alignment or lack of having a v ridge belt which makes things easier for me. Not by any means am I a mechanic but I have formulated my own conclusions on certain situations which have worked for me.

Cricketts

+1 It makes al kinds of things go crazy in these cars.

OSI550i

I have done the right alignment with the dealer and they've checked everything and told me it was over tighten a bit ,however, they fixed it and everything looks okay.

OSI550i

After the change of the alternator, I have still one problem that is driving me crazy and I wish to solve it! Which is linked in this link !
The issue not the rpm but it's when I turn the car completely off and try to crank it again (especially when it's hot) it won't start easily as you will see in the video ! Did any one have this issue somehow?

seanjordan20

Is this a car you just bought recently? You have a lot of issues going on at one time.

It seems like your starter is going out. You can either rebuild it yourself or buy a reman. It seems like the starter is staying engaged after releasing the key.

OSI550i

No it's not a new. I have had it for 3 years now. The rpm craziness is because i have installed the new MAF it will act like that but if i swap it with the old one it stays normal. However, the main issue is the start thing ! I hope it's what you mentioned because i am not sure what it is !

seanjordan20

If it is the MAF making it jump then the new one might be bad. Is the new one OE or aftermarket/OEM. If its aftermarket/OEM then get you an OE. That should correct it. If it is indeed and OE then you might have been sent a bad one or the wrong one.