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.

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: Brakes lock up when wet

This is a common issue with the ABS systems in many cars when the wheel speed sensors are going bad. All of the wheels on the car have wheel sensors that monitor the speed of the wheels and relay this...

Q: The price of unplugging the EGR passage

It depends on the car and what you need to do. I’ve got a video “unplug the EGR low-flow with a speedometer cable” and a lot of times they work pretty well. You unbolt the EGR valve and then you...

Q: it will turn over but won't fire

You would need to scan test the engine computer to see if you are getting a crankshaft and camshaft sensor signal to the computer. If you are not then replace the sensor that is not working. If you need some...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...