Q: I have a wobble on the pulley and an oil leak, is it going to need a main bearing?

asked by on November 12, 2016

My truck is leaking oil from bearing seal and crankshaft pulley has a wobble,but has no knocking or sound omitting from it. How can you tell if it's the front pulley or main bearing that's bad?

My car has 170000 miles.
My car has an automatic transmission.

Hi there. The two symptoms you’re describing (the front oil leak and the crankshaft pulley wobble) are two of the best indicators that a professional mechanic should use to diagnose that the issue is the pulley or the seal behind the pulley. Usually, if the main bearing is damaged, it will cause serious engine acceleration issues or won’t start at all. The best way to know for sure is to remove and replace the front crankshaft seal.

Was this answer helpful?
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

Get a quote

What others are asking

05 Nissan Frontier has a code of p1283 and p0420. Why are these codes stored?

Hi there. The code p0420 is present for the O2 sensor behind the catalytic converter has detected the air fuel ratio is not within the limits. The code p1283 is present for the air fuel ratio sensor is registering a...

After i changed the crankshaft position sensor, i have a code p0302 which is a misfiring code.

The crankshaft and both camshaft position sensors should be replaced at the same time. Nissan had recalls on these sensors. Also, a simple compression test should be performed to verify no mechanical issues exist. This car is known to have...

Popping noise when I turn my 1999 ford expedition

This sounds like you may have wheel bearings that are going out. A wheel bearing will usually fail due to pitting or small damage on the surface of the rollers or the bearing race. Both the surface of the rollers...

Related articles

Symptoms of a Bad or Failing Oil Temperature Sensor
If the temperature gauge gives false readings or does not move, you may need to replace the oil temperature sensor.
Can a Loose Gas Cap Let Gas Leak Out of the Fuel Tank?
The The short answer is: yes ... kind of. What escapes out of a loose or faulty gas cap is gas vapor. Gas vapor rises off of the pool of gasoline in the tank and hangs around in the...
A Buyer’s Guide to the 2012 Nissan Versa
In In the world of subcompact sedans, the Nissan Versa is a serious contender. Not only does it come with a low price tag, but it also includes a lot more features than you’d expect for a subcompact, especially one...