Q: Q: Rattle noise

asked by on

have an 05 dakota with 4.7. I had a mechanic replace both cylinder heads at 106k miles due to cracked heads as it was losing coolant out the exhaust. They had the truck for 2 months due the issues which they eventually resolved. Well the very next day on a cold start up I noticed a rattling niose that lasted a few seconds. not a ticking noise. as if it was a timing chain dragging is the best i can describe it. I gave the truck back to them 2-3 more times which they had for extended periods trying to resove the issue. it got to the point where I just gave up with them. Truck is now just shy of 117k and still has this issue. first cold start of the day it will do it and then usually fine rest of day. there can be a period of a day or weeks where it wont do it at all. really lost with this. not sure if this is something they did wrong or? just looking for some direction. thank you.

My car has 117000 miles.
My car has an automatic transmission.

Hi there. Either the engine’s timing tensioner is loose and not pressurizing up when the engine is started up or the camshaft variable timing solenoid is sticking when the engine oil is thick - cold.

I recommend putting in an engine cleaner in the oil and see if the noise goes away. If the noise goes away, then there was sludge in the timing adjuster or the timing solenoid. If the noise does not go away, then the parts have too much blockage and need either cleaned or replaced. If you need further assistance with your engine having a noise on startup, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Q: Rattle noise

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 stumbles on acceleration and low speed

Hello there, when the camshafts on your 1998 Chrysler Sebring become misaligned it can cause some serious issues. If the cams are not timed properly it can cause the engines valves to come into contact with the pistons causing extensive...

Q: Mpg going down

Hello. If the gas mileage has gotten worse since you replaced the air filter you will want to look into that first. It may be installed upside down or improperly. If the air filter is not the issue, then you...

Q: I figured out the problem, now I need a solution

Hi Danny. Without completing an actual inspection, it's impossible to tell you for certain.

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 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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...