How do you install the oil pump shaft in a 40 c.i engine???

Hi Juan, I'm AL the owner of Big As Auto Repair

Below is the torque specs for the rocker arm as you requested.

SPECIFICATIONS - TORQUE

DESCRIPTION N·m Ft. Lbs. In. Lbs. Camshaft Sprocket-Bolt 54 40 - Camshaft Thrust Plate-Bolts 12 - 105 Forged Connecting Rod Cap-Nuts 54 +¼ turn 40 +¼ turn - Cracked Connecting Rod Cap-Bolts (Refer to 9 - ENGINE/ENGINE BLOCK/PISTON & CONNECTING ROD - INSTALLATION) Crankshaft Main Bearing Cap-Bolts 41 +¼ turn 30 +¼ turn - Crankshaft Main Bearing Cap Cross Bolts (3.8L) 61 45 - Crankshaft Oil Seal Retainer Rear-Bolts 12 - 105 Crankshaft Damper-Bolt 54 40 - Cylinder Block Drain Plugs 20 15 - Cylinder Head-Bolts (Refer to 9 - ENGINE/CYLINDER HEAD - INSTALLATION) Cylinder Head Cover-Bolts 12 - 105 Flex Plate to Crankshaft 88 65 - Engine Mounting (Refer to 9 - ENGINE/ENGINE MOUNTING) Powertrain Torque Strut 54 40 - Exhaust Manifold-Bolts 23 - 200 Exhaust Crossover Pipe-Bolts 54 40 - Intake Manifold - Lower-Bolts 23 - 200 Intake Manifold - Lower Gasket Retainer-Bolts 12 - 105 Intake Manifold Upper-Bolts 12 - 105 Lifter Yoke Retainer-Bolts 12 - 105 Oil Filter Attaching Fitting 54 40 - Oil Cooler Attaching Fitting 27 20 - Oil Filter 20 15 - Oil Filter Adapter-Bolts 28 - 250 Oil Gallery Plug 27 20 - Oil Pan-Bolts 12 - 105 Oil Pan Drain-Plug 27 20 - Oil Pressure Switch 23 - 200 Oil Pump Cover Plate-Screws 12 - 105 Oil Pump Pick-up Tube-Bolt 28 - 250 Oil Dipstick Housing-Bolts 48 35 - Rocker Arm Shaft-Bolts 23 - 200 Spark Plug 16 12 - Thermostat Housing 12 - 105 Timing Chain Case Cover -M8 Bolt 27 20 - -M10 Bolt 54 40 - Water Pump-Bolts 12 - 105 Water Pump Pulley-Bolts 28 - 250
Should you need extra help visit my website here: http://www.bigasautorepair.com/

• ENGINE 2.4L

DESCRIPTION

N·m

Ft. Lbs.

In. Lbs.

Balance Shaft Carrier to Block-Bolts

54

40

-

Balance Shaft Gear Cover-Double Ended Fastener

12

-

105

Balance Shaft Sprocket- Bolt

28

-

250

Balance Shaft Chain Tensioner-Bolts

12

-

105

Balance Shaft Carrier Cover-Bolts

12

-

105

Camshaft Sprocket-Bolt

101

75

-

Connecting Rod Cap-Bolts

54 +1/4 turn

40 +1/4 turn

-

Crankshaft Main Bearing Cap/Bedplate - M8 Bolts

34

250

-

M11 Bolts

41 +1/4 Turn

30 +1/4 Turn

-

Crankshaft Damper

136

100

-

Cylinder Head Cover- Bolts

12

-

105

Flex Plate to Crankshaft

95

70

-

Flywheel Mounting Bolts

81

60

-

Engine Mount Bracket Right-Bolts

61

45

-

Exhaust Manifold to Cylinder Head-Bolts

23

-

200

Exhaust Manifold Heat Shield-Bolts

12

-

105

Intake Manifold - Lower -Bolts

28

-

250

Oil Filter

20

15

-

Oil Pan-Bolts

12

-

105

Oil Pan Drain-Plug

27

20

-

Oil Pump to Block-Bolts

28

-

250

Oil Pump Cover Plate-Bolts

12

-

105

Oil Pump Pick-up Tube-Bolt

28

20

-

Oil Pump Relief Valve-Cap

41

30

-

Spark Plugs

28

Timing Belt Covers - Front Covers to Rear Cover-Bolts

12

-

105

- Rear Cover-Bolts

12

-

105

Timing Belt Tensioner Assembly-Bolts

61

45

-

its located inside the engine there is an oil tank type under the engine with about 15 to 20 bolts this is called sump you have to remove it to get to the oil pum But dont try this at home its a technicians job

Assembling an oil pump is not that difficult provided you do a few things to insure that it works correctly. Now, you didn't tell me if the engine was in the frame or out. The difference is that the oil pump drive shaft will already be in the engine and the assembly will be different than if the shaft is out of the engine.

The first thing is that you want to make sure the oil seal is in the pump body and that it's installed in the correct direction. The lip of the seal must face the feed side of the pump. If you look at the gears and the pump body, you'll see that two gears are "thicker" than the other two. Also, the area that these gears go into are the same, one side it deeper than the other in the pump body. The "thin" gears are the feed gears that pump oil into the engine and the "thick" gears are the scavenge gears that pump the oil out of the engine. Once you get the seal installed correctly. You can start putting the gears and drive keys in.

Start by pulling the drive shaft out the back side to the engine as far as possible and installing the inner oil pump gasket. "Stick" the gasket to the engine case with a thin coating of grease. Slide the driven scavenge gear on the shaft with the drive key installed in the keyway of the shaft. The driven gear is the gear with the keyway cut in it. Lubricate the drive shaft and slide the pump body up to the gears making sure you don't go too far and knock the key out of the shaft.

Now put the drive key for the feed side of the pump in the keyway of the shaft and install the feed side driven gear. Make sure the key does not come out of the keyway. Once you get this installed, put the idle feed gear in the pump body. Then install the snap ring on the pump end of the shaft.

Now, carefully slide the pump towards the engine while holding the oil pump drive gear in place in the cam chest. Slide the pump body up to the engine and loosely install the two short bolts in the pump body holding it to the engine. Turn the pump drive shaft and the drive gear so that the keyways are aligned and use a pair of needle nose pliers to insert the key. Then install the snap ring on that end of the shaft.

Then, "stick" the outer oil pump gasket on the outer face of the oil pump body and install the outer cover of the oil pump. Install the four bolts and snug them up to the cover. Now you are ready to tighten the bolts. You should have the pinion gear and oil pump drive gear removed from the pinion gear of the pinion shaft of the flywheel. This will allow you to turn the oil pump while you torque the bolts.

The oil pump bolts torque to 90-110 INCH pounds. Torque the bolts in a criss cross pattern while turning the drive gear in the cam chest with your fingers. If the pump tightens up at any point, you must loosen and reposition the pump slightly and start tightening the pump again. The goal is to get the pump to final torque and still be able to turn the pump freely. Freely is the key word here. Not herky-jerky turning or having to force the gear to turn.

Good Luck

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.

I don't think you can damage the oil pump gear when torquing the harmonic balancer. Oil Pump Removal & Installation 3.1L & 3.4L Engine To Remove:

1. Remove the oil pan.
2. Remove the oil pump.
3. Remove the drive shaft extension.

Oil Pump and drive

To Install:

1. Install the oil pump.
2. Install the drive shaft extension.
3. Engage the drive shaft extension into the drive gear.
4. Install the pump to the rear bearing cap. Tighten the bolt to 30 ft. lbs. (41 Nm).
5. Install the oil pan.

3.8L Engine NOTE: The oil pump on the 3.8L engine is serviced as part of the engine front cover.

1. Remove the following:
   • Engine front cover.
   • Oil pump cover screws.
   • Oil pump cover.
   • Oil pump gear set.

Oil Pump in front cover

To Install:

1. Lubricate the oil pump gear set with petroleum jelly.
2. Install the oil pump gear set.
3. Pack the oil pump gears with petroleum jelly.
4. Install the oil pump cover.
5. Install the oil pump cover screws. Tighten the screws to 98 in lbs (11 Nm)
6. Install the engine front cover. NOTE: Do not run the engine until the oil pressure is tested. Running the engine without measurable oil pressure will cause extensive damage.
   
7. Inspect the oil pressure.
8. Inspect for leaks.

Inside the oil pan for the 2.3 and 5.0

1. Disconnect the negative battery cable.
2. Remove the oil pan.
3. Remove the oil pump inlet tube and screen assembly.
4. Unfasten the oil pump attaching bolts, then remove the oil pump gasket and the intermediate shaft.

To install:

1. Prime the oil pump by filling the inlet and outlet ports with engine oil and rotating the shaft of pump to distribute it.
2. Position the intermediate driveshaft into the distributor socket.
3. Place a new gasket on the pump body and insert the intermediate driveshaft into the pump body.
4. Install the pump and intermediate shaft as an assembly.

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

1. Install and tighten the oil pump attaching screws to:
   
   2.3L Engine: 12-15 ft. lbs. (16-20 Nm) 5.0L Engine: 22-32 ft. lbs. (30-43 Nm)
   
2. Install the oil pan.
3. Connect the negative battery cable, then start the engine and check for leaks.

On the 3.8...

The oil pump is mounted in the front cover assembly. Oil pan removal is necessary for pick-up tube/screen replacement or service.

1. Disconnect the negative battery cable.
2. Raise and safely support the vehicle on jackstands.
3. Drain the engine oil, then remove the oil filter.
4. If necessary, remove the oil cooler.
5. Unfasten the oil pump-to-front cover retaining bolts, then remove the pump from the front cover.
6. Lift the two pump gears from their mounting pocket in the front cover.
7. Clean all gasket mounting surfaces.
8. Inspect the mounting pocket for wear. If excessive wear is present, complete timing cover assembly replacement is necessary.
9. Inspect the cover/filter mounting gasket-to-timing cover surface for flatness. Place a straightedge across the flat and check the clearance with a feeler gauge. If the measured clearance exceeds 0.004 in. (0.10mm), replace the cover/filter mount. Replace the pump gears if wear is excessive.

To install:

1. Lightly pack the gear pocket with petroleum jelly or coat all gear surfaces with Oil Conditioner D9AZ-19579-CA or equivalent, then install the the pump gears in the cover pocket. Make sure the petroleum jelly fills all voids between the gears and pockets.

WARNING Failure to properly coat the oil pump gears may result in failure of the pump to prime when the engine is started.

1. Position the pump body O-ring seal and install the pump body to the front cover using alignment dowels on the front cover.
2. Tighten the pump retaining bolts as follows
   1. For vehicles through 1993, tighten the M8 bolts to 18-22 ft. lbs. (25-30 Nm) and the M10 bolts to 30-40 ft. lbs. (40-55 Nm).
   2. For 1994-96 vehicles, tighten the four smaller bolts to 15-22 ft. lbs. (20-30 Nm) and the two larger retaining bolts to 6-11 ft. lbs. (8-15 Nm).
   
   
3. If removed, install the engine oil cooler. Install the oil filter.
4. Carefully lower the vehicle, then refill the engine crankcase with the correct type and amount of engine oil.
5. Connect the negative battery cable, then start the engine and check for leaks.

Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.

This is straight from the book.
1. Remove oil pan.
2. Place large drain pan under engine
3. Unbolt the pump and exstension shaft from the rear main cap.
4. Lower same
5.Before reinstall prime the pump with engine oil. Pour oil in the exstension shaft while turning the pump.
6. Attach the pump, extension shaft and retainer to the main bearing cap.
(aling the pump with the dowel pins while you align the top end of the exstension shaft with the lower end of the oil pump drive.
Note when proper it fits into place easily.
7. install the pump mounting bolt and torque to spec.
8. Put the oil pan back on.

Removal & Installation

1. Remove the oil pan.
   
2. Remove the oil pump inlet tube and screen assembly.
   
3. Remove the oil pump attaching bolts. Lower the oil pump, gasket, and intermediate driveshaft from the crankcase.
   
4. To install, prime the oil pump by filling either the inlet or outlet port with engine oil. Rotate the pump shaft to distribute the oil within the pump body.
   

6-cylinder oil pump disassembled



V8 oil pump disassembled

2. Position the intermediate driveshaft into the distributor socket. With the shaft firmly seated in the socket, the stop on the shaft should contact the roof of the crankcase. Remove the shaft and position the stop as necessary.
   
4. Insert the intermediate driveshaft into the oil pump. Using a new gasket, install the pump and shaft as an assembly. Do not attempt to force the pump into position if it will not seat readily. If necessary, rotate the intermediate driveshaft hex into a new position so that it will mesh with the distributor shaft.
   
5. Torque the oil pump attaching bolts to 10–15 ft. lbs. on the 6-cylinder engines, and 22–32 ft. lbs. on the 302 V8.
   
6. Clean and install the inlet tube and screen assembly.
   
7. Install the oil pan
   

No this is normal. As an engine wears then oil preasure will be less this is not due to a weak oil pump but wear in crank shaft bearing's. When an engine is new and bearings are tight then oil preasure wont fall a lot from reved up to idle as the engine wear's oil escapes quicker from the crank shaft bearings. Reved up oil preasure increases idle it drops off. If the oil light stays out then their is enough preasure to lubricate the engine. In fact in an older engine high oil preasure is a worse complaint as this means the oil system is clogging. All is ok with your pump. If the oil preasure is moving up and down at constant rev.'s then the oil pump is faulty. Hope this put's your mind to rest.