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Belt Tensioner-Main 3.0 L Diesel 2007-2014
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Serpentine Belt Tensioner - Main 3.0L V6 Diesel 2007-2022

Only for 3.0L V6 diesel engine.

This is a Litens belt tensioner and is the identical unit as those sold at a Dodge, Freightliner or Mercedes Benz dealer.

The ECO Direct Start engines (Code B03) use a different tensioner which can be seen below.
Part Number:  642 200 13 70
Dealer List  $215.20
Europarts Price:
Savings:$115.49 (54%)
Detailed Description
Sprinter II 2007-2018 3.0L V6
Sprinter III 2019-2022 3.0L V6

This is the main serpentine belt tensioner. If you have rear A/C, see the secondary tensioner/damper assembly, shown below.

If you have had premature failures of this tensioner , serpentine belt, or any of the other pulleys and items driven by the belt, you most likely have a seized alternator pulley.  The alternator pulley is a decoupling/declutching pulley and has a one-way clutching mechanism to minimize belt flutter.  Belt flutter places stress on the entire belt drive system and the tensioner acts as a belt shock absorber.  If the declutching pulley has seized, it will greatly shorten the life of the belt tensioner and often causes a pulley to break off or a fracture.  Replace the alternator pulley or the alternator in order to solve this problem.  To check the integrity of your alternator pulley, simply remove the belt and place a screwdriver into the front of the alternator cooling fan to stop the armature from rotating.  Then turn the pulley by hand.  If it moves one direction but, not the other, it is functional.  If it will not rotate at all, it has failed.

See this video for more info:    http://www.gatesprograms.com/adp

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