I'M TRYING 2 FIND D KNOCK SENSOR ON A 1999 PONTIAC GRAND PRIX(3.8 3800 V6 STANDARD). I HAVE D HAYNES MANUAL. ALL IT SAYS, THAT IT IS ON THE ENGINE BLOCK. I STILL CANT FIND IT.

What code did you pull ? How do you know it's bad ?
Remove the transaxle. Refer to Transmission Replacement for the 4T65-E transmission. Drain the cooling system. Refer to Cooling System Draining and Filling . Remove the bolts (2) from the knock sensor heat shield (1). Disconnect the knock sensor electrical connector (3) from the knock sensor.

check a shop manual for the info

Click here to see.

its suppose to move up to 1/2", it is spring loaded!! Now if its squealing or chirping at startup or when the engine is revved, the tensioner is probably worn and needs replacing along with the belt!!

CYLINDER HEAD GASKET LOCATED BETWEEN CYLINDER HEAD AND CYLINDER BLOCK.YOU CAN GO TO ANY AUTO PARTS STORE BUY A CHILTON OR HAYNES REPAIR MANUAL.IT WILL HAVE PHOTOS WITH HEAD GASKET.

No these engines have rev-limiters on them to keep engine from over reving and breaking camshafts and other parts.

Will be on the side of the engine block.Held on with one bolt that screw into the block, remove bolt and sensor slide out.

sensor Is the sending unit which is attached to the fuel pump inside the fuel tank

There is only 1 knock sensor on the engine. Check the connector first, and make sure you are running a decent grade of gas. You may need to replace the sensor if all else is okay

Hello! Here is a picture of the location of the front knock sensor for a 3.8 liter V6 3800 Series II (97-03)
(Please note that the engine is upside down on the stand)
There are 2 knock sensors on this engine, one on the front (as shown), and another in the rear. There isn't one on the driver's side, per se.



I recommend that you let the vehicle cool down before beginning this process. To remove this you will need a drip pan, as coolant will leak from the engine when the sensor is removed. You will need a deep well 22mm socket and torque wrench.

1. Jack up and support the vehicle on jack stands so that you can work from underneath the vehicle. Be sure to apply your emergency brake.
2. Identify the knock sensor location and remove the electrical connector on the bottom.
3. Using the deep well socket, remove the sensor from the block. Do not position yourself direcly underneath this, as coolant will begin to flow immediately from the sensor's location.
4. Your new knock sensor should come pre-coated with sealant/threadlock, just install it and tighten by hand until snug.
5. Torque the sensor to 14 ft lbs.
6. Replace the electrical connector.
7. You should flush the entire coolant system to be sure to remove any air pockets, and then refill.


Hope this helps and thanks for using FixYa!