Skip the auto shop - Our mechanics make house calls

Q: How do I remove crank arm from wiper motor

asked by on

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?

A: It is possible to loosen the nut, but it ca...

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.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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

Get a quote

What others are asking

Q: How Do Headlight Wipers Function?

Headlight wipers are small wiper arms and blades that clean the headlight assemblies on select vehicles equipped with such a system. The headlight wipers turn on when the windshield wipers are turned on, and if they are equipped with headlight...

Q: Obd scan tool is not reading. Car wont start. An battery keeps dying. New battery

Check fuse number 11 in fuse box to see if it is blown. Check all fuses in engine and interior fuse boxes for any blown ones. You may need to try disconnecting the engine control module and reconnecting it...

Q: Flashing Check Engine Light is on. The engine shakes at idle and has low power.

Hi, the first task is to extract the problem codes which are causing the Check Engine light to flash. Most auto parts stores will do this for free. I would suspect plug wires next, and check the condition of the...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.