Easy lifehacks

Is piston slap normal when cold?

Is piston slap normal when cold?

“Piston slap is generally caused when the cold running clearance (piston-to-wall clearance) is large enough that when the piston rocks from side to side in the bore it “slaps” the side of the cylinder and causes noise,” explains JE Pistons’ Clayton Stothers.

What does screeching noise on startup mean for Chrysler?

Chrysler has issued a service bulletin #07-002-15 REV. A to address a screeching noise on startup, or more specifically an idler pulley noise during cold start on the vehicles listed below:

Why does my car make a hollow noise when I Turn on the engine?

Piston Slap. A hollow, muffled, almost bell-like sound is usually piston slap. This condition is caused by a piston rocking back and forth within its cylinder. Continuous piston slap means the engine needs service; however, if you only notice this sound when the engine is cold, it is likely not serious.

Why does my GM Truck start so cold?

Look up piston slap to study it more its mostly from the short piston skirts that allow the piston to rock around more when cold. Also different oils help, i run moble 1 truck 5w30 in my truck with 116k on it. I have heard that gm top end cleaner and the 3m kits work well.

Why does my car keep making piston slap noises?

Imagine going to an important meeting only for your old car to start making rattling noises and emitting bluish smoke from the exhaust. Modern cars do not suffer from piston slap due to internal onboard computers. A simple solution to reduce piston slap is to warm your engine during cold weather before revving it.

Why do my Pistons rattle when the engine is cold?

Piston rattle or slap when an engine is cold indicates too much clearance between pistons and cylinders. This may be due to excessive assembly tolerances or worn cylinders. Some forged pistons have a higher rate of thermal expansion than cast pistons, and may require slightly greater cold clearances to compensate.

Chrysler has issued a service bulletin #07-002-15 REV. A to address a screeching noise on startup, or more specifically an idler pulley noise during cold start on the vehicles listed below:

Why does my injector make a noise at the bottom of the cylinder?

You can also try unplugging an injector one at a time to see if the noise goes away on a certain cylinder. If the noise goes away with an injector unplugged then its likely a bottom end issue. Could be a rod bearing. Although I have seen a few collapsed pistons in the 4.7’s over the years.

Why does my car make a pinging noise when under load?

The classic symptom of detonation or spark knock is a pinging or knocking noise that is heard when the engine is under load. Over time, detonation can be very damaging to the pistons as well as the rings, head gasket and rod bearings. Detonation damage typically includes cracked or broken ring lands and cracks in the piston itself.

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Ruth Doyle