Skip the auto shop - Our mechanics make house calls

Q: Loud tick knock around 1500 to 2500 rpm and a little on startup

asked by on

I have a tick knock at startup and around 1500 to 2000 rpm is worst. Bad Rod bearing or bad valve lifter.

My car has 125000 miles.
My car has an automatic transmission.

A: Hello, thanks for writing in about your 200...

Hello, thanks for writing in about your 2006 Dodge Stratus. It can be tough to tell the differences between engine noises sometimes. In general, small parts make smaller noises. Bigger parts make deeper noises. Think drums or cymbals.

Lifters make ticking sounds (sort of like a ballpoint pen clicking) and usually on cold startup. Sometimes it goes away after oil pressure pumps them up. Piston slap is just a bit deeper, on starting a cold engine, and goes away within a minute or two as pistons warm up and expand.

Rod knock is deeper still, sounds very solid, and doesn't go away but may get worse with a hot engine. Piston pin knock is very similar. Take off the accessory belt and start it for a minute just so you can positively eliminate any of the accessories as being the cause of the noise. If you need help having this issue looked at, a certified mechanic from YourMechanic can come to your car's location to diagnose the noise and let you know what should be done.

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

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Radio only works through steering wheel controls

It sounds like the radio unit in your vehicle may have partially failed to where the controls no longer work. I would recommend having your radio inspected by a qualified professional. This inspection may involve the removal of the radio...

Q: Car won't start after doing valve cover job.

Hi there. From the description you have provided, something was reassembled incorrectly. Not replacing the upper intake (plenum) gaskets should not have caused the vehicle's no start condition. Once that you have the plenum removed, carefully inspect all the components...

Q: Starter fuse blowing

It is likely that your starter motor has failed. A fuse is meant to protect your vehicle's electrical system from drawing too much current, or electricity. If your starter motor shorts out that gives electricity a straight path to ground...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...