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

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: Car jumping when letting off gas

Greetings. Your described symptoms sound to me as the cause might be a broken engine or transmission mount. Gasoline engines generate a lot of torque and the mounting system keeps the engine and transmission under the hood! A weak or...

Q: Pressure valve cover rings

The pressure you are observing is not a good thing. First off, check to see if the positive crankcase ventilation valve (PCV valve) is clogged up. If it is, then it should be replaced. Also check to see if the...

Q: Car Sitting waiting for repair. Sat 9 Months Now repair finished but will not start.

Hi...gasoline has a limited shelf life. After four months or so, but sometimes even earlier, gum and varnish develop. Gasoline that is nine months old will typically not have enough of the volatile fractions (from the refinery process) to start...

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...
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...