What kind of tensioner does Mercedes Benz serpentine belt use?
There are two styles of serpentine belt tensioners. The earlier (112,113 engines) style has an E10 bolt, while the newer (272,273 engines) uses a 17mm nut for adjustment. Figure 1. Comparing the newer style tensioner on the left to the older on the right. The newer engine (272,273) will require you to remove the front engine cover.
How do you check the tension on a serpentine belt?
Check the belt tension by looking at the tensioner arm—the mark cast into the tensioner body will fall between the high and low marks if the belt is the correct part number and is installed properly. Torque the new tensioner to the specified degree of tightness. Yes, that means with a torque wrench, not your carefully calibrated elbow.
Can a serpentine belt be replaced without going to the shop?
It’s a crucial part of the engine assembly—here are step-by-step instructions for replacing your serpentine belt without bringing your car to the shop. This belt, obviously past its prime, ran for 115,000 miles, and it was still within the tension limits specified. It’s toast, regardless.
What kind of nut does a serpentine belt use?
Small punch, cotter pin, rivet, carpentry nail etc. There are two styles of serpentine belt tensioners. The earlier (112,113 engines) style has an E10 bolt, while the newer (272,273 engines) uses a 17mm nut for adjustment.
There are two styles of serpentine belt tensioners. The earlier (112,113 engines) style has an E10 bolt, while the newer (272,273 engines) uses a 17mm nut for adjustment. Figure 1. Comparing the newer style tensioner on the left to the older on the right. The newer engine (272,273) will require you to remove the front engine cover.
How do you tighten a serpentine belt on a car?
If your vehicle does not have an auto tensioner, insert a pry bar or piece of wood between the alternator and the engine. Run the belt over the alternator pulley, then use the bar to pry the alternator away from the engine and increase the tension on the belt. Tighten the bolts again as you apply tension.
What kind of pulley does a serpentine belt use?
Determine if there is a belt tensioner pulley. Depending on the application, your serpentine belt will either have tension placed on it using a movable bracket or an auto tensioner pulley. This pulley uses an internal spring to apply consistent pressure to the belt at all times.
Where do I find the serpentine belt routing diagram?
Find the serpentine belt routing diagram. Many cars come with a sticker in the engine bay that shows exactly how the serpentine belt is supposed to be routed through the various pulleys on the engine. If your vehicle does not have a sticker, you will need to find another way to remember how the belt should be run.