Go ahead and change the serpentine belt, tensioner and idler roller when replacing an alternator on your car or truck.
By the DIY experts of The Family Handyman Magazine:June 2010
Examine idler rollers for wear patterns.
If you see wear, they're not
You bring your car in for a new alternator and the mechanic wants to change out the serpentine belt, the tensioner and the idle roller too. Is it worth it?
Yes. Your mechanic is
actually looking after your
best interests. Belts, tensioners
and idler rollers rarely last the
life of the vehicle.
The additional labor for the
idler roller is minimal (about
$10), and the labor for the tensioner
usually runs about $50. If
you plan to keep the vehicle,
you'll save money in the long
run by replacing these parts now.
Have the necessary tools for this DIY project lined up before you start—you’ll save time and frustration.
Avoid last-minute shopping trips by having all your materials ready ahead of time. Here's a list.
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