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Michael Nelson Posted on Apr 21, 2018
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I have a engine knock noise on a 2000 crown victoria police interceptor. Is it rod knock or the lifters?

I bought it a couple of days ago for 800 bucks. It has a knocking noise that isn't always consistent in volume. It sounds like a combination of lifters and rod knock so I'm confused. I put some seafoam into the gas tank and engine block and am still running it. When the car is driving, every so often that seemed more often than not today that the knocking noise was getting quieter until the engine was under load then it would be the same. Is this rod knock? or just lifters? Or the beginning of rod knock? I'm hoping the engine isn't blown but if it is, I intend on swapping the engine out with another one. I don't want to drive it just in case if it is rod knock, but I'd like to try to difinitively diagnose the problem before jumping into replacing a motor that may just have stuck or broken lifters.

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Marvin

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  • Cars & Trucks Master 85,242 Answers
  • Posted on Apr 21, 2018
Marvin
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Piston noise makes a noise that goes away when the engine warms most times, rod knocks get much louder as the engine is loaded, Keep driving it and see what blows? Have you checked the oil pressure with a mechanical gage?

Testimonial: "I have not checked it, on the guage in the car, it shows its getting oil pressure. just above the center of the guage between h and l. It doesn't get much louder but it does get louder when i accelerate."

5 Related Answers

Anonymous

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  • Posted on Jan 22, 2009

SOURCE: 2004 and 2001, are parts interchangeable?

Yes they are as long as the Motors are Similar.

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Anonymous

  • 2 Answers
  • Posted on Feb 24, 2009

SOURCE: Headlights turn off while driving

Headlight module under the dash. It is the size of a box of crackers, not a small part.

Anonymous

  • 4 Answers
  • Posted on Apr 28, 2009

SOURCE: cylinder 4 misfire on a 2000 crown victoria interceptor

first cylinder 4 is the last on the passenger side . first pull the coil out and check if there is water where the plug is. if there is take the water out and dry up the coil. if you find water you got a crack manifold or a bad intake manifold gasket. if there is no water replace the coil. good luck

Anonymous

  • 1 Answer
  • Posted on Jun 05, 2009

SOURCE: 2003 Silverado 1500 knocking when I start the engine

This is normal with the 2000 to 2003 silverado 1500 after about 70,000 miles. It is not a worry. after truck warms and the oil has lubricated the engine, the tic noise should stop.

Anonymous

  • 1 Answer
  • Posted on Jul 23, 2011

SOURCE: engine knocking noise in 2000 saab 9-3 SE?

It's a common problem with these cars i am actually fixing mine as of now. That car is all about oil pressure and when it is low you'll start to get a tap and or what sounds like a knock due to the lifters not having enough pressure. Try taking your oil pan off and check your oil pick up line going from the oil pan to the turbo. A lot of times it gets a lot of sludge build up and makes the pressure little to none. If that looks clear check the slump inside the oil pan and see if that has sludge build up. Well hope this helped

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Crown victoria making knocking noise

Listen to the engine, if the noise is down low it is rod if it is up high it is valves. IF it is rod knock it will eventually throw the rod.
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Water pump failed. Car overheated. Engine lost power. Car smoke out from back of engine and from rear of car. I replaced water pump. Car still smokes when I drive it. Still has no power.

Notorious for intake leaks, the composite plastic intakes crack and leak coolant-as to the lack of power, you mght have overheated it and done some damage to the engine. There was a recall (information below) for the 4.6 for the intake-the overheating and lack of power means you should at least have compression checked and go from there-you may have bad head gaskets or worse. Do a compression test before you do anything else.

Ford Motor Company will extend the recall (01M02) on 4.6L V8 equipped vehicles with plastic intake manifolds. Some of the composite intake manifolds used on 4.6L SOHC engines may develop fatigue cracks at the coolant crossover duct. This condition could result in engine coolant leakage which, if not serviced, may cause engine overheating. Complete loss of coolant may result in engine damage or engine failure.
The updated recall now includes:
• Certain 1996 through 2001 Model Year Crown Victoria Police Interceptor
• Certain 1998 through 2001 Model Year Crown Victoria with Taxi
• Certain 1998 through 2001 Lincoln Town Car Limousine and Livery Prep Package
• Certain 1996-2001 Crown Victoria Taxis, Police cars and Lincoln Town Car Limousine and Livery cars.
• Certain 1996 through 1997 Crown Victoria Police Interceptor Vehicles with 4.6L SOHC engines built at the St. Thomas Assembly Plant from the beginning of production for the 1996 Model Year through January 28, 1997.
• Certain 1998 through 2001 Crown Victoria Police Interceptor Vehicles with 4.6L SOHC engines built at the St. Thomas Assembly Plant from November 22, 1997 through December 15, 2000.
• Certain 1998 through 2001 Crown Victoria Taxi Vehicles with 4.6L SOHC engines built at the St. Thomas Assembly Plant from November 22, 1997 through December 15, 2000.
• Certain 1998 through 2001 Lincoln Town Car Limousine Prep Package and Livery Vehicles with 4.6L SOHC engines built at the Wixom Assembly Plant from November 22, 1997 through December 15, 2000.
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Lifter noise

Sludge in the engine.
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1996 Ford Crown Victoria Police Interceptor makes a popping noise

Go to online store reliable they have repair manuals I am sure you will get the solution.
Here's the link
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