answersLogoWhite

0

  • Fuel and Engines
  • Pontiac Le Mans
  • 1995-2005 Chevy Cavaliers

How do you determine if you have a rod knock?


Top Answer
User Avatar
Wiki User
Answered 2011-09-13 01:05:12

Always check your repair monuel before using any tip to see if it will hurt your electrical or ignition system. Increase the rpm until the noise is heard then disable one fuel injector at a time. When the noise quits you have found the cylinder with the problem. If your engine is carb you have to pull one spark plug wire at a time to determine the cylinder. If the noise does not quit the problem is in the top end of the motor or the belt or acces. system. One last hint, cracked automatic flywheels will sound just like a rod bearing.

001
๐Ÿ™
0
๐Ÿคจ
0
๐Ÿ˜ฎ
0
๐Ÿ˜‚
0
User Avatar

Your Answer

Loading...

Still have questions?

Related Questions

How can you determine what is wrong with a 1990 V-6 3.8 Ford engine from the noises like a rod or rocker arm it makes?

first you must determine that, it's NOT a rod knock or rocker arm


Rod knock noise but rods and bearings are fine?

did you disassemble the engine to determine the rod condition? some harmonic balancers will make a knocking sound when they go bad


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.


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. .


Why does your engine knock when you step on the gas?

Probably a bad rod bearing


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


How do you fix rod knock?

The reason for rod knock is there is play where the connecting rod Jonie's piston. Or play where the rod connects to crankshaft. this usually results from a constant lack of engine oil. this is when wear between rod and piston, and/or rod and crankshaft will occure. the only way to permanently fix is to machine the rod that is worn, basically taking apart most of the engine. try using a high viscosity oil with an additive. this will fill in the wear , and maybe you will be OK.


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.


Why does your 93 Cadillac DeVille knock when the engine is accelerating?

If it is more of a ping than a knock then just try running some higher octane fuel in it. If is more of a knock it could be a rod or crankshaft bearing. If it is definitely a knock you should get it looked at right away.


How do you determine where the rod goes on the camshaft?

a rod doesn't go on the camshaft. Perhaps you have your terminology mixed up?


What would cause your 5.3 vortec to knock?

A spun--Bad rod bearing. NO OIL PRESSURE.


Why does your car make a knocking sound when you drive?

Could be a rod knock. Your bearings slipping in the engine.


What does a knock sensor control?

it reads if your motor is knocking. say bad rod bearings or loose valves. it will kick your check engine light on if it reads knock from the motor.


How do you quiet rod knock?

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 is a knocking sensor on a 1999 Chevy Lumina?

It's a sensor that tells the computer if there is a rod knock in your engine.


The engine is making a knocking noise what could it be?

Depends on the sound of the knock. Could be main bearings or rod bearings.


What could cause a 2000 ford contour's engine to knock?

Rod or main bearings. Those are located on the crankshaft.


How does knocking takes place in engine?

Spark knock is the result of pre-ignition. Bearing knock is the result of worn main or connecting rod bearings. Either one can do internal damage to the engine.


Does cracked flex plate makes nocking noise?

It sure does . Almost like a rod knock . But with a crack flex plate if you press and hold the brake pedel and step on the gas pedel just a little the noise goes away .. With a rod knock the noise gets louder and faster as you step on the gas..


Why does the when engine knock when accelerating your 1993 Mercury Grand Marquis?

Because you are about to throw a rod. You need to find a mechanic quick!


Why does my 3 cylinder Geo Metro motor knock after a short time?

More than likely worn rod bearings.