I have a loud rattling sound in my engine on a 1989 k3500 7.4 liter engine that sounds like coming from front part of engine seems to go way as i accelerate possibly or get quieter when accelerating.

SOURCE: Loud ticking/knocking/rattling sound when I start/accelerate

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

SOURCE: Rattling sound when accelerating on 2007 Forester

On mine, I got under there and there are rocks rattling in the heat shield. There are factory made holes in it, and the rocks sit in there like eggs in a carton and rattle when the engine hits a certain vibration frequency which is basically when it is at a stop light or idling. The repair shop wanted to charge to cut them off but I think I am going to drill bigger holes so the rocks fall out, as they are pretty tiny.

SOURCE: Loud accelerating whining

THE FAN CLUTCH WILL MAKE A LOUD ROARING NOISE WHEN THE ENGINE IS STARTED AND GET LOUDER AS THE RPM IS RAISED. THERE IS A PROGRAM UPDATE THAT SOMETIMES FIXES THIS PROBLEM. IF NOT THE FAN CLUTCH WILL HAVE TO BE REPLACED AND THE PROGRAM UPDATED.

SOURCE: 2002 mustang makes rattling sound when accelerating...

Possible bad motor mount(s) --only thumps or rattles when power is going to the wheels.

Ot Tap

• 253 Answers
• Posted on Nov 27, 2009

SOURCE: Have 2003 Nissan Pathfinder. Engine rattles under acceleration.

I would have to hear it. may be the engine mounts.