Skip the auto shop - Our mechanics make house calls

Q: What can cause the drive belt to stop moving for a second or two, then come back on and repeat?

asked by on

Ok so everything started when my car started squealing. First my engine started getting hotter than normal making the fluid in my water container boil out of the overflow so I have to fill it up everyday to keep it from overheating. I figured that could be the thermostat but then my power steering would randomly go out for a few seconds and the squealing would get loud. I was looking under the hood today and noticed that the belt stops turning every now and again and then starts again. At first I thought I should replace my thermostat and power steering pump. Then I read online about the drive belt and it seems it could be the cause of everything failing but the belt looks brand new. So I'm thinking maybe I need to replace my belt tensioner? Also my car decided not want to stay on yesterday and was wondering if that could have caused it as well or if it's probably a spark plug or coil pack? Sorry for the long question.

My car has 189000 miles.
My car has an automatic transmission.

A: You should look at the lower crankshaft pul...

You should look at the lower crankshaft pulley to see if it is not spinning when the belt stops. If that is the case, then the crankshaft damper rubber is not gripping the hub and needs replaced. If the pulley continues to turn when the belt stops, then check belt tensioner to see if it is tension on the belt properly is tight. If it is loose then replace the tensioner and check all the accessories to make sure they move freely. If you need help replacing the tensioner, YourMechanic offers a repair and diagnosis service preformed by a mobile, professional mechanic that will commute to your location for this repair.

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: Various lights as well as radio don't work anymore

The first thing I would check is under the hood and under the dash for signs that a mouse did not get in there and make a home. Mice will eat the outer covering off of the wires and other...

Q: Car jumping and vibrating heavily

These symptoms could have numerous causes. The first step is to retrieve the diagnostic trouble code (DTC) associated with the Check Engine Light. This code provides a starting point for the diagnostic procedure. There is a technical service bulletin (TSB)...

Q: My car makes a winning noise when i start up the car that low external temparatures (below 10C). 2007 Ford Mondeo

Hi there - the noise you describe appears to be affected by engine speed as well as temperature. The noise could be from the power steering pump, alternator, water pump, or serpentine belt idler pulley - something that is engine-driven....

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.