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Replacing the Serpentine Belt
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V6Alfisti
Original Poster
3,308 posts
229 months
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Friday 25th September 2009
I have a spare bit of time this weekend and fancy changing the Serpentine belt on my 400.
Can anyone give me a quick "how to" guide, so I can get it off, measured up and a new one stuck back on.
Useful picture I found from another thread 
chrispitman
742 posts
256 months
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Friday 25th September 2009
Just find a spanner that will fit on the nut on the tensioner then as you lift the spanner the tensioner will move and take presure of the belt so you can slide it off. Just make sure you put the belt back on the same way as it will also fit another way around.
The belt is abit of an odd legth and you may find that the local auto factors dont have one and will have to order one in. The length will be written on the belt. They also seem to very alittle +/- 5mm in length.
977
448 posts
186 months
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[news]
Friday 25th September 2009
1. Lift the belt between the alternator and the tensioner, you can move the tensioner a reasonable amount.
2. Then you push against the tensioner to hold it where it is grunting loudly in between a flood of eloquence.
3. Slide the belt sideways off the alternator pulley.
4. Then try and get your hand out from between the collector and the tensioner where it usually gets wedged.
5. After that you just wiggle the belt out of its various places.
6. Wipe the sweat off your forehead with a greasey hand, and wander in to make a cup of tea, get told off for getting grease all over the tea towel, and a questioning over why you look like a aspiring iPod advert man.
Simon Says
18,991 posts
223 months
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[news]
Friday 25th September 2009
chrispitman said:
Just find a spanner that will fit on the nut on the tensioner then as you lift the spanner the tensioner will move and take presure of the belt so you can slide it off. Just make sure you put the belt back on the same way as it will also fit another way around.
The belt is abit of an odd legth and you may find that the local auto factors dont have one and will have to order one in. The length will be written on the belt. They also seem to very alittle +/- 5mm in length.
As above with a 15mm spanner 
V6Alfisti
Original Poster
3,308 posts
229 months
[report]
[news]
Friday 25th September 2009
chrispitman said:
Just find a spanner that will fit on the nut on the tensioner then as you lift the spanner the tensioner will move and take presure of the belt so you can slide it off. Just make sure you put the belt back on the same way as it will also fit another way around.
The belt is abit of an odd legth and you may find that the local auto factors dont have one and will have to order one in. The length will be written on the belt. They also seem to very alittle +/- 5mm in length.
Thanks, just did this....incredibly easy.
Found out I need a ERR5267 / 7PK1850 belt
garagebench
39 posts
185 months
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[news]
Friday 25th September 2009
HI.
Is there a good reason not to put the belt on the other way ?,
reason i ask is i have mine on the other way {new belt and tensioner}
as it was the only way to stop all slippage & screetching
chrispitman
742 posts
256 months
[report]
[news]
Friday 25th September 2009
The other way I assume alternator and pass pump don't have as mutch belt contact. Also never checked but I assume all the pullys rotate in the same direction. If it squels then the belt is probably slightly to long there are quite a few belts availiable all +/- 5-10mm which causes the problems. I had one new one from the local factors which was only like 5m longer but the tensioner kept hitting the stop and causing a really anoying tap.
PRTVR
7,160 posts
223 months
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[news]
Friday 25th September 2009
The picture above is from a short guide I attempted to make using two pieces of wood
See link below
http://homepage.ntlworld.com/phillip.richardson/we...
( but give up on as I was having problems with the pictures)
and thinking about it the spanner method probably has less chance of causing damage but it does work.
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