Skip the auto shop - Our mechanics make house calls

Q: Replace crank seal and harmonic balancer

asked by on

I have seen many diff videos of people replacing there seals and balancers and all of them use different Lube/oil to rub around seal/balancer shaft 1 used sealer on the outside of the seal... What is the recommended lube and where to apply it please :)

My car has 110000 miles.
My car has an automatic transmission.

What you must of seen is a mechanic using sealer on the outside of the seal so it will seal any leaks between the seal and the front cover. This is okay to do. Before the balancer is installed you should use fresh motor oil and rub it on the balancer outside shaft where the seal will ride to help it slide into the seal without damage. You will also see sealer put on the key way of the shaft or inside the balancer key way to seal the shaft key way from oil leaks. Also a small amount of sealer is put on the crankshaft bolt to seal the bolt from oil leaking through the threads.

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!
  1. Home
  2. Questions
  3. Replace crank seal and harmonic balancer

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: change a thermosrat on a 2004 VB beetle 1.8

Make sure that all of the old gasket material is removed and that the surface is clean and dry before installation. Sometimes, gaskets will leak due to an unclean surface or uneven surface. By using RTV (silicone), it fills in...

Q: how do I change an external harmonic balancer?

You will have to remove the center bolt. Once the bolt is removed, then using a harmonic pulley puller and locking the puller to the three bolt holes and running the center bolt in until the pulley and harmonic pulley...

Q: I feel a solid bump when I hit the brakes

Have the vehicle driven to see if when the brakes are tough when the steering is pulled one way or the other. If it is, the problem is in the brakes or suspension on that side it pulls to. The...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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.