Question about 2000 Jaguar S-Type

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Engine Knock.....Mystery Unsolved!!!!

My 2000 Jaguar engine started to knock, after 3 months of (DIY) attempts i am in dire need of help.Is it possible to swap a 2000 Jaguar S-type 4.0L engine with a 2000 Lincoln LS 3.9L engine?

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  • ianbarrett64 Jan 22, 2009

    I have the same problem, after £300+ spent i'm told it is the VVT valves (common fault). the oil ways into these units gets blocked. I was told to use a thicker oil 10w-40 to incresce the pressureto the VVTs. it worked but it comes back after running for 5 min and then go's again after running for 15 min.

  • Anonymous Mar 03, 2009

    knocking sound from the top left side of the engine.

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Hi i worked on engines most of my life and done conversions and my advice would be to anybody thats not used to doing this type of job is leave well alone stick with the oridginal engine as you will find it will not be straight forward and its a big enough job to start with i know these are not best engines stick a quality oil in and change filter regular yates210456

Posted on Oct 13, 2008

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I hear a knocking sound when ever I start my engine


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The pcm uses the knock sensor to monitor for engine knocking, and adjusts ignition timing based on this. If there is no knock sensor present, you will wind up with a hard fault that will keep the check engine lamp on continuously. Also, the truck will go into a more conservative driving mode to prevent knocking.
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caused by hot and lean.
which engine.??? at least 3 choices.
most have knock sensors. and will not knock.
if it really is knock then that is serious.
knock means detonation or ping.
if its just noise say that,
real PING happens under load.
1: check fuses.
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Where is my knock sensor bank 2 located at on my jaguar x-type? (2002, 2.5 cylinder v6)


There are two knock sensors located on top of the Engine, approximately in the middle of the 4 cylinders at each bank.
To get access to the sensors the black plastic engine cover with the "Jaguar V8" imprinted on has to be removed.

There are two types of knock sensors.
The "old" ones that are of a "screw-in barrel type" and the newer ones that are just bolted on.

I describe the replacement of the bolt-on type knock sensor on Bank 2 in the following documentation on a 1999 XJ8 AJ27 engine.

Be careful!
Knock sensors are piezo electric devices that are very sensitive! If dropped, over-torqued or struck they will probably be destroyed.
As knock sensors are sensitive to a sudden temperature change they are also easily fractured by steam blasting a hot engine.
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1 Answer

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Instructions Things You'll Need:
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  • 3/8-inch drive ratchet wrench
  • 12 mm socket
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  1. Open the hood, and disconnect the battery negative cable with a wrench.
  2. Locate the black rubber air intake tube that runs from the air cleaner box to the throttle body on top of the engine.
  3. Loosen the clamp on the air intake tube at the throttle body with a wrench. Grasp the tube and pull it off the throttle body inlet, and move it out of the way.
  4. Locate the knock sensor. It's bolted to the engine near the throttle body. Remove the hold-down bolt attaching the knock sensor to the engine block, using a 3/8-inch drive ratchet wrench with a 12 mm socket attached.
  5. Follow the electrical lead of the knock sensor to its connector, and simultaneously lift the plastic tab with your hand while gently pulling apart the plug.
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  7. Reattach the knock sensor to the engine block by threading in the original holding bolt by hand. Snug the bolt with the ratchet wrench and 12 mm socket. Do not over-tighten the bolt.
  8. Plug the new knock sensor into the original electrical plug.
  9. Gently push the throttle body air intake tube onto the throttle body. Tighten the hose clamp with a wrench.
  10. Reconnect the battery's negative terminal with a wrench. Close the hood.
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I had the same problem. The dealership wanted to charge me $12,000.00. I told them where they could go...The problem with my engine (I also found out this is common with this style,year,whatever) the timing chain busted...NOT the timing belt, but the chain inside. I had the engine rebuilt.

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1. How many miles on your car?

2. Is the engine hot, when you try to start the car?

3. Is the engine hot, when you heared the knock noise?

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