replacing alternator belt

Engines, Transmissions & Final Drive questions and answers

Moderators: timk, Stu, -alex, miata, StanTheMan, greenMachine, ManiacLachy, Daffy, zombie, Andrew, The American, Lokiel

Fatty
Speed Racer
Posts: 3175
Joined: Fri Feb 03, 2006 10:39 am
Vehicle: NA6
Location: Melbourne

replacing alternator belt

Postby Fatty » Thu Jun 07, 2007 4:02 pm

hey guys,

got a new belt for the alternator as the other one is knackered. any tips on fitting it? i guess there is some way of loosening the tension off so i can remove the old belt... but i haven't actually looked at it yet :oops: :roll:

User avatar
Garry
Speed Racer
Posts: 3481
Joined: Sun Apr 27, 2003 11:00 am
Vehicle: NB SP
Location: God's Country
Contact:

Postby Garry » Thu Jun 07, 2007 4:36 pm

There's the adjustment bolt that you can see from the top that is pretty easy to get at. There is also a pivot bolt at the bottom that isn't quite so easy to get to. You may need to remove the plastic undertray and attack it from the under the car.
Shiney black one with added red bits. Member of the fart club. Now with extra doof and Sunlong. - deceased and gone to heaven

Fatty
Speed Racer
Posts: 3175
Joined: Fri Feb 03, 2006 10:39 am
Vehicle: NA6
Location: Melbourne

Postby Fatty » Thu Jun 07, 2007 4:55 pm

cheers gary. the undertray is actually off the car at the moment, so that'll make things easier.

User avatar
fastfreddygassit
Waitin' for a mate
Posts: 1773
Joined: Sat Jun 25, 2005 8:00 pm
Vehicle: NB SE
Location: Waitin' for a mate in Melbourne somewhere
Contact:

Postby fastfreddygassit » Thu Jun 07, 2007 10:36 pm

Hey Fatty, how did you go with loosening the pivot bolt?
I found it a lot easier if I scrapped my knuckles on the concrete first, as it
saved me all the loud swearing later on :mrgreen: :mrgreen: :shock:
And even then, i stuffed it up. As heard by nearly everyone on the nightime spur run. :oops: :oops: ***screeeeeccchh***
Got it right the second time. The skin on my knuckles hasn't healed though...

User avatar
green_comet
Car Detailing Guru
Posts: 1848
Joined: Tue May 24, 2005 1:41 am
Vehicle: NA8
Location: Melbourne

Postby green_comet » Thu Jun 07, 2007 11:54 pm

I couldnt get to that pivot bolt with anything other than a ring spanner, there is not much room to play with in there. Once the new belt is on, you tighten it up with the adjustment bolt, then when your happy with how tight it is you do up the pivot bolt.

You will also have to go back and check the belt in a few days, after its has settled in. They tend to stretch a little, and need a re-adjusting or they screech like Fast Freddy's car.. :?

User avatar
sabretooth
Speed Racer
Posts: 2119
Joined: Wed Apr 23, 2003 11:00 am
Vehicle: NA8 - Turbo

Postby sabretooth » Fri Jun 08, 2007 2:07 pm

Image

First up, there's a bolt in the bracket with its head facing the front of the engine. This is the bolt that is used to hold the alternator in place - ie, the tensioner locking bolt. The first thing you'll want to do is back this off a bit.

Now the really long bolt that goes through the end of the bracket is what is used to pull and push the alternator. Wind it anticlockwise until the alternator cannot be pushed in any more. If you are having difficulty doing this, then either a) loosening the pivot bolt (at the bottom of the alternator) or b) using something long for leverage and pushing against the alternator - may help.

Now slide the belt on, but slide it onto the biggest pulley last. I find that it's easiest to get a tough-to-install belt onto the largest pulley.

Once the belt is done, wind the really long bolt back up until tight, and then wind the locking bolt back into place. If you loosened the pivot bolt, ensure it's tight.


Return to “MX5 Engines, Transmission & Final Drive”

Who is online

Users browsing this forum: No registered users and 3 guests