Q: How do I remove crank arm from wiper motor

asked by on May 18, 2016

I am trying to swap out my wiper transmission assembly, but have run into a problem. I can't remove the crank arm from the assembly that's coming from the wiper motor. I thought it would be a simple socket wrench job, but I can't get the nut to budge. Some lubricant didn't help free it up either. The new assembly came with a new crank arm.

Is it not possible to remove the nut? Do I need to break the nut and then use a replacement? I thought about purchasing a new wiper motor, but it looks like they all have the crank arms permanently attached too. Any ideas what to do here?

Windshield Wiper Linkage Replacement $135.68 - $883.54 Get a Quote

It is possible to loosen the nut, but it can be difficult, and usually takes some skill and patience. Depending on your skill level, this may or may not be something that you want to attempt.

When nuts like these can’t be removed with a socket wrench and/or lubricant, it may be possible to use a heating agent, such as a propane torch. This can be dangerous, so it is important to have a water bottle nearby, and be prepared just in case a fire ignites. Engines are extremely combustible, as you may already know, so it may be necessary to seek help from a professional.

Sometimes the nut can be removed using this method, but there is no guarantee, so it is possible that you may need to have a replacement nut on hand, and crank arms are permanently attached to all wiper arms for the make/model of your vehicle. If you need any help with your windshield wiper linkage replacement, contact a certified technician, such as one from YourMechanic.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

How do I check the brake fluid level?
The brake fluid is necessary for the brakes to function correctly. Locate the tank that holds the brake fluid which is located on the back left side of the car under the hood. On the side of the tank, you’ll...
How do I pair an additional phone?
The HandsFreeLink system can pair up to six mobile devices. If you have already paired at least one device, pairing a second is easy: 1. Press the Phone button. 2. If the system asks you to connect to a phone,...
Squealing noise coming from engine
Hi there, the Corolla has a timing chain that won't make a squealing sound because there are splines on the inside of the belt/chain to prevent slipping. There are tensioners and pulleys that can wear out over time causing unwanted...
DBC light is lit up on the dash (red).
Hi there. The Downhill Brake Control (DBC) light is on for either the system is active by having pushed the on button or the controller under the dash is malfunctioning. First look for the button that turns on the downhill...
Check charging system light is coming on 2006 Ford Taurus
Hi there - your symptoms suggest that your alternator is not keeping the electrical system properly charged. Low system voltage (https://www.yourmechanic.com/question/electricity-gauge-reading-low-voltage-just-charged-my-battery-and-replaced-alternator-in-april-connections-look-good-by-noah) can affect the performance of the engine directly. Poor alternator performance could be a slipping serpentine belt, failed voltage...
Power steering intermittently goes out
Hello, thank you for writing in. You need to start by considering the symptoms. If they are exactly the same, the issue may have been a faulty replacement part. It is not terribly uncommon, but is even more frequent in...
i have 88 cadillac just got it with brand new tranny i think they damaged seal putting it in what would be my estimated cost for
The cost depends on which seal is leaking. If, for example, the leak is at a transaxle output shaft seal, you can input your year, make and model at the service page for axle shaft seals (https://www.yourmechanic.com/services/axle-shaft-seal-replacement) to obtain a...
I have a 2006 pontiac torrent all wheel drive my traction control is on it won't turn off what mite be the issue i
Hi Frefdie. Thanks for contacting us tonight. If this warning light came on after a rainy day, then it's likely that you have an ABS or traction control sensor that is damaged or an electrical harness connected to the sensor...
Catalytic converter
I would first check with another exhaust shop to get a second opinion. Sometimes the metal used or the flex pipe location will not allow a new pipe to be welded in.

Related articles

Top 5 Reasons Your Windshield Wipers Aren't Working
Good windshield wipers aid safe driving. Torn wiper blades, a bad wiper motor, a blown fuse, or heavy snow may be why your wipers are not working.
What Are the Different Types of Windshield Wipers?
When When you need to clean your windshield, you spray washer fluid onto the glass and turn on your windshield wipers. They swipe back and forth to remove any visual obstructions that may have collected on the glass. There are...
Symptoms of a Bad or Failing Windshield Washer Pump
Common signs include washer fluid not spraying evenly, no fluid spraying onto the windshield, and the pump not engaging when you activate the system.