Adjusting Nissan Sentra Serpentine Belts

Introduction: Adjusting Nissan Sentra Serpentine Belts

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Squealing or slipping belts? This DIY "how-to" shows you where to find the simple adjustments for the serpentine belt and standard belt for a Nissan Sentra and how to tighten it. Photos are of a 2006 model year with a GD16DE motor but many models are similar.

Be sure the engine is turned OFF before making any adjustments.

Tools needed:

- 8mm socket wrench with a small extension (for serpentine belt adjustment rod)

- 14mm socket (for serpentine belt idler pulley)

- 12mm socket (for regular belt adjustments)

For the serpentine belt: Just be sure to slightly loosen the 14mm idler-pulley nut before you adjust the 8mm threaded adjustment rod.

For the smaller belt that goes around the power-steering and waterpump, be sure to loosen the 12mm nut on the side so the power-steering pump can move before you adjust the 12mm nut on the threaded adjustment rod.

DO NOT overtighten the belts. Only tighten them enough to stop the squealing to avoid extra stress on the belts and bearings.

These adjustments use a normal (as opposed to a reverse) thread. We like to use this simple memory mnemonic to help you remember which way to turn light bulbs, nuts, bolts and other things that screw in and out:

"Righty-Tighty - Lefty-Loosey"

Making Nissan Sentra Serpentine Belt Adjustments

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    Question 3 years ago on Introduction

    I loosen the nut and I twisted the rod but the belt still isn't loose


    Answer 1 year ago

    If you mean the back tensioner nearest the driver, the nut on the back of the bracket isn't the only thing holding the pulley from moving. There's a bolt on the very back of the pump that is almost impossible to get to unless you know what to look for.

    Once that is loose, the entire thing pivots, yet no one ever seems to mention it. It's strange. In theory it will allow movement, but it will be stiff and not obvious movement.. You'll be able to retention a belt with it tight as it rotates on the bolt, but it really makes it feel like there's no movement when loosening.

    Incredible actually that they shared that bolt with such an important aspect of the cars future maintenance, because, here we all are talking about it 15 years later.

    If you mean the front tensioner, it really is just the 14mm bolt on the idler pulley that locks the front pivot.


    1 year ago

    Can anyone recommend a good belt tension gauge?

    While I know you can start loose and tighten if you hear and squeal, the tensioners are kind of garbage for this car, and it's very hard to feel any difference.

    Surely there's an official tension from the dealership?

    Thanks for the advice. I wasn't sure how to adjust the power steering belt till I read this. The only thing I would add is that you should tighten the belt some, ( I couldn't tell how tight to go), then start the car and see if it stops the slipping, then you could readjust if needed.

    I am sorry for my english, but, for me, was necesary to loosey one bolt inner side of

    the power steering pump, , it can make accesible taking out the tire and cautchut