What does a knock in the engine feel like?

It could be a squeal, a clunk, or even a rumble and roar. If the sound is closer to a “knock,” you may be dealing with problems under the hood—problems that could cause engine damage if left unresolved.

Why does my Chevy Silverado make a knocking noise?

65 people found this helpful. for a piston slap you need to pull apart the motor and possibly either re-bore the cylinder with the bad piston or replace the entire block be cause of the damage done to the piston and the cylinder as the piston “slapped” against the walls of the cylinder most likely gouging the cylinder walls

What does it mean when someone is knocking on your engine?

Your car is idling and you’re impatiently waiting, listening to engine noise. You have places to be and time is running out. It sounds like someone keeps banging on your oil pan with a hammer, rhythmically rap-rap-rapping. If your car’s has a broken engine you can consider selling your car online or read on about engine rod knock.

Where does the knocking noise come from in a car?

But there’s no one under your car and no one is knocking on your engine. The noise comes from deep in the bowels of your motor. When you rev up the engine, the pitch and frequency changes.

What’s the knocking noise coming from MY Suburban?

I recently ran into this same knocking/ ticking issue coming from my 2005 Suburban, 5.3 Vortec. After countless hours of research, multiple engine flushes, oil change, air filter, valve adjustment…etc etc etc…my solution and problem were relatively simple.

What makes a Chevy Silverado make a knocking noise?

For the first 30 to 60 seconds after a cold start, the short-skirted pistons rock inside the cylinders and slap against the cylinder walls, sounding rather like a diesel engine. The knocking can be heard around the top of the engine, but is much louder if you listen in the front wheel wells or beneath the truck.

What kind of engine does a Chevy Silverado have?

The Vortec 4.8, 5.3, and 6.0 liter engines have a main accessory drive belt for the water pump, power steering, and alternator. The main belt has a GM auto-tensioner (which maintains spring pressure to automatically adjust for optimum tension as the belt wears) and an idler pulley.

Is it bad to hear piston slap in Chevy Silverado?

In TSB 01-06-01-022 (Aug 22, 2001) and TSB 01-06-01-028A (Mar 18, 2003) GM has stated that piston slap is not detrimental and will not affect the service life of the engine. Indeed, many owners report reaching 300,000 miles despite hearing piston slap. Valve lifter noise is a light, rapid metallic clicking.

Where does the clunk come from on a Chevy Silverado?

The clunk will appear to come from the front, under your feet. When upshifting from 2nd to 3rd or downshifting from 3rd to 2nd, the 4L60E transmission may clunk. In TSB 01-07-30-042B (Jan 16, 2004) GM has stated that this is normal and no service is required.