Question about 2000 Jeep Grand Cherokee

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Knocking in the engine

The engine is making a knocking sound

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  • thistlesdesi Jan 25, 2009

    Thank you very much................we were told we are going to have to have a new engine ! I am sick.......................

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2 things that this SUV are known foe Rod knocks and bad tranny.. both very $$$$$ but they are great when they are working right.... Rod knocks are very VERY bad

Posted on Jan 19, 2009

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1 Answer

What can cause knock sensor to get bad on 2007 ford edge


Well the knock sensor does not make any noise. It senses the vibration in the engine if there is a spark knock to let the computer know to slow down the spark timing.
You probably have a weak piston or lifter or rod bearing making the noise.

Jun 16, 2015 | 2007 Ford Edge SEL

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There is a knocking sound in my engine


sounds like a rod is knocking, check oil to make sure it is full. If it has plenty of oil then if it checks out ok, you probable need new engine.

May 18, 2015 | 2005 Mitsubishi Colt 1.3

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2000 Estima, 6 cylinder, makes a short whining noise on start up, also when placed into gear both forward and reverse - mainly when cold - makes a slight knocking sound that fades when you pick up speed,...


The whining noise at start up is either the power steering pump (possibly low fluid, or faulty pump bearing), or possibly a belt on the engine. As for the knocking sound, that is hard to diagnose without actually hearing it, but based on the fact that you are hearing a whining sound at start up, which is indicative of a loose belt, I would start at the belt tensioner and make sure that it is applying the correct amount of pressure on the belts. If the belt tensioner is faulty, it can make a knocking sound. If that is not the issue, then it could simply be the lifters. With engine run time/miles on the engine, internal engine components, such as lifters, valves, bearings and any moving part, deteriorate from friction wear and heat.They have a tendency to make a knocking/rattling sound when they are building up pressure. When they build sufficient pressure, or the engine reaches operating temperature, this sound/noise will dissipate and become nonexistent. This can be remedied by changing the oil, and possibly the weight of the oil (5w30, 10w40, 20w50) depending on your driving habits , or conditions (Highway v/s City/Stop&Go, or short trips under 30 miles)

I hope that you have found this information to be useful, and if I can be of any further assistance, please let me know. Thank you for using fixya!

Oct 01, 2013 | 1995 Toyota Previa

1 Answer

Engine Knocking / No Power


Dosent sound good. Oil light on means you lost oil pressure. and the knocking sound is the damage done due to low pressure. Start looking for another engine or another van.

Dec 30, 2011 | 1993 Plymouth Grand Voyager

1 Answer

Knocking sound


Knocking sound is bad and most likely time for a new engine. The knocking noise your are hearing is the pistons knocking against the engine block when it goes up and down.

Inspect the level of your engine oil to make sure you have enough oil in there.

Thank you for using fixya and good luck

Aug 24, 2010 | Toyota Tacoma Cars & Trucks

1 Answer

1997 LeSabre has engine "knock"


If it knocks at 50 it will knock sitting still if you race it up. Is the oil pressure good? These motors hardly ever have a bearing problem. The only knock problem was the harmonic balacer that comes apart and knocks. The rubber falls apart and it will make a knock sound all the time, more with the ac on. If you have a knock at 50 or highway speed only you may need a outer tie rod end only. Get the front end checked as they will make a knocking sound on the highway. reply

Nov 08, 2009 | 1997 Buick LeSabre

1 Answer

I have a 1995 Subaru Legacy, and it started making "knocking sounds". Ck the oil, it was OK


If the sound does not go away then the engine has internal problems. Some times if someone over revs the engine it will cause knocks.If the oil is not changed regularly and the engine gets hot due to low water,racing engine then engines dont last long.
If its a deep solid knock its a crank shaft bearing.
If its a lighter knock then some times if you remove the right plug wire and the knock goes away (of course the engine will run rough due to lost cylinder) its that pistons wrist pin bearing.
At any rate your engine will need rebuilt or replaced.Or get a different car.

Nov 02, 2009 | Subaru Legacy Cars & Trucks

1 Answer

APC Solenoid Valve Knocking


The APC valve regulates boost pressure (via the wastegate) to avoid over-pressurising the engine. It ensures that a safe boost pressure isn't exceeded. Don't run with it disconnected or you risk blowing the engine!

Problem areas can include: knock sensor on the engine block (also poor quality fuel, dirty engine causing knock); engine ECU.

You need to provide more information about when this happens:

hard accelerating? (likely poor quality fuel, dirty plugs/engine causing knock) and general driving similar.

idling? possibly a knock sensor or ECU related problem

What rpm? what boost gauge pressure?

as an outside chance, maybe a sticky wastegate

Saabreur

Nov 12, 2008 | 1992 Saab 900

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