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That knock could be the piston hitting the cylinder head (spun bearing)... if you keep running it you will only cause more damage.
The knock is absolutely not the piston hitting the cylinder head. The knock is because the clearance of the rod bearing to the rod journal on the crank has increased to such a point that there is actually a gap. As the crank turns the rod is "slamming" back and forth causing the sound. In fact, a worn rod bearing actually does not push the piston as high in the cylinder. In other words, it would be further down from the head.
You can run a heavier oil or maybe add some Lucas to quiet it down, but that's just a band aid. Eventually you will have to rebuild the engine or find yourself on the side of the road.
What else can I help you with?
What is a knockout rod?
a knock out rod is the rod that will knockout you when you use it
What is the knocking sound on a 350 chevy it sounds like a rod but then it stops rods dont just stop knocking do they?
Some causes will:A leaky lifter will pressure up and quit, and can sound like a rod knock when the clearance is bad enoughA collapsed piston skirt will quiet down when the engine warms upA rod can knock under load or start up and quite down when oil pressure is applied. Its only going to get worse though.
What does it mean when an engine has a tick?
a lot of times its your timing belt, if its more of a knock its could be a rod knock
What causes my Jeep engine to knock?
And engine knock is normally caused but I worn crankshaft bearing or rod bearing.
Engine knocking sound in 84 Chevy?
light slapping knock is a piston knock a loud heavy repetitive knock is a connecting rod Very Bad
Why would an engine suddenly knock very loud and then stall out?
A loud knock is usually associated with a rod bearing. The rod connects the crankshaft to the piston. If a rod bearing went out, possibly from an oil pump going bad, it would stall out the motor.
Why does your engine knock when you step on the gas?
Probably a bad rod bearing
What is a bearing knock?
A bearing knock, or a rod knock develops when the bearings between the rod and crankshaft wear, leaving a gap, allowing the crankshaft to slap the connecting rod. The knock develops slow for a few miles but once the rod starts to knock then the gap increases because the metal in the rod and the crankshaft get destroyed and deteriorated. As the gap increases the knock gets worse, and as the gap increases the knock and the damage will rapidly get worse. Within a short while the connecting rod will break open and get stuck between the crank and the engine block, possibly cracking the block and destroying the crankshaft. The engine is now inoperable :< To prevent the rod knock, let your engine warm for a minute or so before driving to ensure the engine oil has been pumped throughout the engine, and get regular oil changes, because a thin film of oil is all that separates these engine parts, and dirty oil will be squeezed between the metal parts, increasing the rate of erosion. .
What could cause a 1995 Subaru Impreza to knock when it is first started for a second and then seem fine it almost sounds like its coming from up in the head area and not a rod knock?
Fine it almost sounds like its coming from up in the head area and not a rod knock? OMG
What do you hear when your outer tie rod ends are worn?
It could knock or squeak.
How do you know when a rod bearing is gone?
The engine will have a distinct "Knock" while running.
What actors and actresses appeared in Quiet Please - 1989?
The cast of Quiet Please - 1989 includes: Rod Filbrandt as Father Flannery
