Loud ticking/knocking/rattling sound when I start/accelerate
When I start my 2000 Grand Caravan, it makes a loud knocking sound and when I accelerate, it rattles, I can feel it behind the accelerator pedal. It has only been doing it a couple of days now. We changed the oil, and it is worse now than before the oil change.
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Re: Loud ticking/knocking/rattling sound when I...
Hi is it miss-firing as it sounds like a knocking noise can be anything but if you can feel it on the accelerater pedal then the noise sounds like its on the inlet valve side which would transfere the noise up the throttle body where the accelerater is located it could be something as simple as a tappet come loose to a burned valve you need to have a look do a compression test and take the rocker cover off see if theres anything come loose yates210456
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sounds like lower end bearing damage (connecting rod) when oil level drops at interstate speed a connecting rod bearing will seize very quickly thus causing the bearing to spin in the rod and enlarge clearance . that is the knocking sound you here .
If the noise still sounds like it's on top, I'd remove the valve covers and check the rocker arms to make sure they aren't broken or worn. Also crank the engine over and observe how far each travels. If any are different, a lifter or lifter and cam have gone bad. If your oil pressure is low or the noise is deep inside the engine, likely you have a crank bearing problem. In most cases it's more economical to get a scrapyard replacement rather than do a rebuild. Before doing anything like that, have an experienced tech listen to it. Only other thing that can make a noise like that is a broken flywheel. A good tech can tell the difference between noises and give you better advice than I can because he can hear it.
No I would not chase to the pistons, these vehicle were very comon in creating HLA noise hydraulic lash adjusting valves, meaning the valves pump up with oil as the oil gets thinner they dont pump up as fast and create a very loud ticking noise, I would not express a great concern over simplicity, dodge was famous for this, they really were.
ROD Bearings DO NOT "TICK" They KNOCK Loud believe Me You Would Know it if it Was A ROD Knocking. I would Advise you Check your OIL Pressure Manualy as the Oil Pump Can Contribute to the Problem you Are Describing