It is not pumping engine oil - Cars & Trucks

1. Engine Noise. With a bad oil pump sufficient engine oil will not get to all parts of the engine, especially the top end, and you will get engine noise with metal parts that would normally be lubricated and quiet knocking due to metal to metal contact. Engines with hydraulic lifters that become noisy can be a sign that they have insufficient oil supply. In addition to the hydraulic lifters, your valve train may begin to make noise if your oil pump begins to fail. Valve train components need to be properly lubricated as well. A bad oil pump can result in a lot of additional noise from your valve train system.

2. Higher engine temperature. Poor lubrication because of poor oil flow generated from the pump will cause friction in the engine and the engine temperature will rise. Good oil flow is essential for lubrication and reducing friction to a minimum.

3. Low oil pressure. The oil pump generates oil flow through the engine but tolerances between metal parts produce the oil pressure. Very worn engine bearings will result in low oil pressure. Thus a worn engine will have low oil pressure even though the oil pump may be fine and there is no issue with the oil pressure relief valve either. However you will also experience low oil pressure due to a failing oil pump because poor oil flow will also result in lower oil pressure.

If your oil pressure warning light has been triggered in your engine, the causes of the low pressure need to be properly investigated because the problem may not be with the oil pump. People replace oil pumps assuming that is always the problem and then still have low oil pressure because the pump was not the problem to begin with.

You have to remove the engine front cover (over timing chain) and remove the oil pan to get the oil pump in and out. You don't have to remove the heads, however.

Removal & Installation

4.8L, 5.3L, 6.0L & 6.2L Engines






Fig. Exploded view of the oil pump mounting-4.8L, 5.3L, 6.0L and 6.2L engines


Fig. Oil pump disassembly-4.8L, 5.3L, 6.0L and 6.2L engines

1. Remove or disconnect the following:
   
   
   NOTE
   
   Do not allow dirt or debris to enter the oil pump assembly, cap ends as necessary.
   
   
   
   
   NOTE
   
   The internal parts of the oil pump assembly are not serviced separately (excluding the spring). If the oil pump components are worn or damaged, replace the oil pump as an assembly. Do not attempt to repair the wire mesh portion of the pump and screen assembly.
   
   
   
   
   
   Engine front cover Oil pan Oil pump screen bolt and nuts Oil pump screen with O-ring seal. O-ring seal from the pump screen. Discard the O-ring seal. Remaining crankshaft oil deflector nuts. Crankshaft oil deflector Oil pump bolts
   
   
   
   
   
   
   
   Oil pump To install:
   
   
   
   
   NOTE
   
   Inspect the oil pump and engine block oil gallery passages. These surfaces must be clear and free of debris or restrictions.
   
   
   
   
   
   
   1. Align the splined surfaces of the crankshaft sprocket and the oil pump drive gear and install the oil pump. Install the oil pump onto the crankshaft sprocket until the pump housing contacts the face of the engine block.
   
   
   
   2. Install or connect the following:
      
      
      NOTE
      
      Lubricate a NEW oil pump screen O-ring seal with clean engine oil.
      
      
      
      
      NOTE
      
      Push the oil pump screen tube completely into the oil pump prior to tightening the bolt. Do not allow the bolt to pull the tube into the pump.
      
      
      
      
      
      Oil pump bolts. Tighten the oil pump bolts to 18 ft. lbs. (25 Nm). Crankshaft oil deflector
      
      
      
      
      
      
      
      NEW O-ring seal onto the oil pump screen
      
      
      
      
   
   
   
   3. Align the oil pump screen mounting brackets with the correct crankshaft bearing cap studs.
   
   
   
   4. Install or connect the following:
      
      
      
      
      Oil pump screen Oil pump screen bolt and the deflector nuts. Tighten the bolt to 106 inch lbs. (12 Nm) and the nuts to 18 ft. lbs. (25 Nm). Oil pan Engine front cover
      
      
      
   
   
   
   
   
   
   

the 2.3 and 3.1 engines need to drop oil pan.for the 3.3 engine you have to remove timing chain cover.you have to remove oil filter adapter the pressure regulator valve and the valve spring.then remove oil pump cover to oil pump screws remove cover remove oil pump gears.when installing another new oil pump lubricate the oil pump gears with clean engine oil pack the pump cavity with petroleum jelly.torque oil pan cover screws to 97 inch lbs which would be 11 ft lbs torque.oil filter adapter plate 24 ft lbs.

5.2L and 5.9L Engines
It is necessary to remove the oil pan, and to remove the oil pump from the rear main bearing cap to service the oil pump.

1. Drain the engine oil and remove the oil pan.
2. Remove the oil pump mounting bolts and remove the oil pump from the rear main bearing cap.

To install:

1. Install the pump and tighten the cover bolts to 95 inch lbs. (11 Nm).
2. Prime the oil pump before installation by filling the rotor cavity with engine oil. Install the oil pump on the engine and tighten attaching bolts to 30 ft. lbs. (41 Nm).
3. Install the oil pan.
4. Fill the engine with the proper grade motor oil. Start the engine and check for leaks.

Well i hope its not the oil pump because the oil pump works with the speed of the engine when it turns and as you know when the engine turns fast the oil pump turns fast too and the more you accelerate the faster the oil pump turns, that means there is more pressure of the oil to go up top the engine and when the engine idles, The pump turns slowly, and doesnt pump enough oil up top the engine and the oil pressure switch dosent detect any oil passing by then it send a message that the pressure is low. So check your oil pressure during idle. Good luck Bro

THE 1.6L ENGINE OIL PUMP FRONT OF CRANKSHAFT TIMING COVER.YOU HAVE TO REMOVE CRANKSHAFT PULLEY AND WHOLE TIMING CHAIN COVER.YOU HAVE TO REMOVE OIL PAN TO REMOVE OIL PUMP PICK UP TUBE AND SCREEN.. THE 1.8L ENGINE OIL PUMP IN THE OIL PAN.YOU HAVE TO REMOVE OIL PAN TO REMOVE OIL PUMP FROM ENGINE.

I'm assuming that you are talking about 2.7L, the check this procedure...

Removal & Installation - 2.7L Engines

1. Drain the engine oil.
2. Remove or disconnect the following:
   Crankshaft damper Timing chain cover Timing chain Crankshaft sprocket Oil pan Oil pickup tube and O-RING Oil pump

To install:

Fig. Oil pump mounting bolt locations-2.7L engine

1. Fill the oil pump rotor cavity with clean engine oil.
2. Carefully, install the oil pump over the crankshaft and into position.
3. Install the oil pump mounting bolts and torque to 21 ft. lbs. (28 Nm).
4. Lubricate the new pickup tube O-ring with clean engine oil and torque the pickup tube mounting bolts to 21 ft. lbs. (28 Nm).
5. Install or connect the following:
   Oil pan Crankshaft sprocket Timing chain Timing chain cover Crankshaft damper
6. Fill the engine with clean engine oil.
7. Start the vehicle, check for leaks and repair if necessary.

Hope helps (remember to rate this).

REMOVAL & INSTALLATION

Gasoline Engines
See Figures 1 and 2



Fig. Fig. 1: Exploded view of the oil pump used on 2.0L and 2.3L gasoline engines



Fig. Fig. 2: Exploded view of the oil pump used on the 4.0L engine-2.8L and 2.9L engines are similar

1. Follow the service procedures under Oil Pan Removal and remove the oil pan assembly.
2. Remove the oil pump retainer bolts and remove the oil pump.

To install:

1. Prime the oil pump with clean engine oil by filling either the inlet or outlet port with clean engine oil.
2. Rotate the pump shaft to distribute the oil within the pump body. Install the pump and tighten the mounting bolts to 14-21 ft. lbs. on 2.0L and 2.3L engines; 6-10 ft. lbs. on 2.8L and 2.9L engines or 13-15 ft. lbs. on 4.0L engines.

Do not force the oil pump if it does not seat readily. The oil pump driveshaft may be misaligned with the distributor shaft assembly. To align, rotate the intermediate driveshaft into a new position.

1. Install the oil pan as previously described. The oil pumps are not serviceable. If defective, they must be replaced.

Remember rated this.

Remove the engine front cover then drain the engine oil and take out the oil pan. It is under the engine and looks like the bottom of the motor.
Unscrew the oil pump mounting bolts with a wrench and proceed to remove the oil pump itself by pulling it down and out of the engine. Avoid getting any contaminants into the oil pump assembly while removing.
Add fresh oil to the new pump to prime it. Check the alignment on the new oil pump drive with the crankshaft/intermediate crankshaft timing.

Step 2 Install the new pump carefully, rotating it back and forth a little to make sure it has full surface contact between the pump and the engine block.

Step 3 Hold the pump in its sealed position and put in the pump mounting bolts, tightening them to 15 ft-lb.

Step 4 Put the engine oil pan back in and refill the crankcase. Start the engine and check for leaks on the parts you replaced

Oil Pump

Removal

1. If necessary, remove oil bypass filter (oil filter).
2. Remove oil pump and filter body to engine front cover retaining bolts and remove oil pump and filter body from engine front cover.
3. Inspect oil pump body seal (6C639), oil pump and filter body and engine front cover for distortion and wear. Replace components as necessary.

Installation

1. Position oil pump and filter body on engine front cover and install retaining bolts.
2. Tighten the small engine front cover retaining bolts to 8-11 Nm (71-97 lb-in) . Tighten the large retaining bolts to 23-32 Nm (17-23 lb-in) .
3. If removed, reinstall oil bypass filter (oil filter).