Skip the auto shop - Our mechanics make house calls

Q: Bottom-end knock in Chevy Trail Blazer

asked by on

2005 Chevy Trail Blazer. They say there’s a common bottom-end knock. Some say slur your water pump. I'm getting no real answer.

There is an easy way to test it. Pull all your fan belts off. If you pull the belts that are on it and the noise goes away then it can easily be the water pump. Then grab the water pump and the knocks changing. Pray that it’s that because if it doesn’t go away, it’s inside the engine which will lead to a slight buildup. If it’s knocking, then it’s too late. That means that the engine bearings are wearing and the rods are knocking because there’s too much play. If you would like to have a professional test it for you, a technician from YourMechanic can visit your location to diagnose your engine’s noise.

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. Bottom-end knock in Chevy Trail Blazer

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: Water pump replacement - 2013 Ford Taurus

Hello there, replacing the water pump is a common repair on your 2013 Ford Taurus. As you probably know, problems with the water pump can lead to overheating problems and inability to maintain consistent temperature for the vehicle. If you'd...

Q: Bearing grinding in front wheels

Hello. If you are getting a growling or grinding noise while driving down the road, then it is more than likely a bad bearing. These need to be serviced and packed with new grease over time to prevent this from...

Q: Service Engine Light staying on.

This code is for the oxygen sensor (O2) heater control circuit. O2 sensors in modern vehicles use a heating element to bring the sensor up to operating temperature faster. This allows the powertrain control module (PCM) to use the sensor...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...