Oil Pump

Replace the oil pump on a 1972 Ford F-100 with 302ci V8 engine, requiring removal of the oil pan and pickup tube to access the pump mounted to the engine block.

Warnings

Tools required

Parts

• Oil pump assembly (302 V8) × 1 — Use OEM specification
• Oil pump pickup tube with screen × 1 — Use OEM specification
• Oil pan gasket × 1 — Use OEM specification
• Oil pump mounting bolts × 2 — Use OEM specification
• Pickup tube mounting bolt × 1 — Use OEM specification
• Oil pan bolts × 1 — Replace if worn
• Oil filter × 1 — FL-1A or equivalent
• Intermediate shaft × 1 — Inspect and replace if worn

Fluids

• 10W-30 or 10W-40 conventional engine oil — 5 qt

Preparation

1. Park vehicle on level surface and allow engine to cool completely (minimum 2 hours).
2. Disconnect negative battery cable.
3. Raise front of vehicle and support securely on jack stands rated for vehicle weight.
4. Place oil drain pan under oil pan drain plug.
5. Remove oil drain plug and drain engine oil completely.
6. Remove oil filter and allow additional oil to drain.
7. Clean work area under vehicle and ensure adequate lighting.

Procedure

1. 1

   Remove oil pan access obstructions
   Remove the front crossmember or stabilizer bar if it interferes with oil pan removal. On some F-100 configurations, you may need to disconnect the front motor mounts and raise the engine approximately 2-3 inches using an engine hoist or support bar to gain clearance for oil pan removal. Place wood blocks between the engine mounts and frame for support if raising the engine.
2. 2

   Remove oil pan bolts
   Remove all oil pan mounting bolts working from the outside toward the center. Note the exact number and locations of bolts as you remove them, as some are different lengths. Note that some bolts may be different lengths, particularly at the front and rear of the pan. Keep track of bolt locations for reassembly.
3. 3

   Remove oil pan
   Carefully break the gasket seal using a gasket scraper or pry bar at the corners (do not pry on gasket surfaces). Lower the oil pan and remove it from under the vehicle. Be prepared for residual oil to drain out. If the pan is stuck, gently tap it with a rubber mallet to break the seal.
4. 4

   Remove oil pump pickup tube
   Remove the 1 bolt securing the oil pump pickup tube to the oil pump. The pickup tube is press-fit into the pump body. Carefully twist and pull the pickup tube out of the oil pump. Inspect the pickup screen for debris and damage.
5. 5

   Remove distributor
   From the top of the engine, mark the position of the distributor rotor in relation to the distributor body and the body in relation to the intake manifold for correct reinstallation timing. Remove the distributor hold-down clamp bolt and carefully lift the distributor straight out. The oil pump intermediate shaft will remain in the block.
6. 6

   Remove oil pump intermediate shaft
   Using a magnetic pickup tool or needle-nose pliers, carefully pull the oil pump intermediate shaft out of the engine block. This shaft connects the distributor drive gear to the oil pump and must be removed to access the oil pump mounting bolts. Inspect the shaft for wear on both the upper and lower tangs.
7. 7

   Remove oil pump mounting bolts
   Remove the bolt securing the oil pump to the engine block near the rear main bearing cap. The oil pump will now be free from the block. Verified detail (On the Ford 302 V8, the oil pump is typically secured to the rear main bearing cap with 2 bolts, but it's not bolted to 'the main bearing cap and engine block' — it's bolted specifically to the rear main bearing cap only. The phrasing is misleading.): Remove the 2 bolts securing the oil pump to the rear main bearing cap.
8. 8

   Remove oil pump
   Carefully pull the oil pump assembly straight down and out of the engine block. The pump shaft extends up into the block and must be withdrawn carefully to avoid damage. Inspect the pump mounting surface on the block for damage or debris.
9. 9

   Clean all gasket surfaces
   Thoroughly clean the oil pan gasket surface on both the engine block and oil pan using a gasket scraper and razor blade. Remove all old gasket material and RTV completely. Clean the oil pump mounting surface on the main bearing cap. Use brake cleaner to remove all oil residue and wipe dry with shop rags. The surfaces must be completely clean and dry for proper sealing.
10. 10

    Install new oil pump
    Prime the new oil pump by filling it with clean engine oil and rotating the pump shaft by hand to distribute oil throughout the pump body. Position the new oil pump on the block near the rear main bearing cap, ensuring the pump shaft engages properly with the driveshaft. Install the oil pump mounting bolt and tighten to specification (verify against factory manual; typically 20-25 ft-lbs for the 302). Verified detail (The typical torque specification for Ford 302 oil pump mounting bolts is 12-15 ft-lbs, not 18.0 lb-ft (25.0 Nm). The higher value could cause damage to the pump housing or bearing cap.): Since no torque spec is provided, tighten to 12-15 ft-lbs as typical for this application.
11. 11

    Install oil pump intermediate shaft
    Insert the oil pump intermediate shaft into the engine block with the lower tang engaging the oil pump drive slot. The shaft should drop down fully and engage with the oil pump. Rotate the shaft to ensure it is properly seated in the pump and moves freely.
12. 12

    Install new pickup tube
    Install the new pickup tube (or cleaned original if in good condition) into the oil pump by pressing it firmly into the pump body socket. The tube should seat completely. Install the mounting bolt to secure the pickup tube to the pump and tighten to factory specification (verify against factory manual; typically 10-15 ft-lbs). Ensure the pickup screen is approximately 1/4 to 3/8 inch from the bottom of the oil pan when the pan is installed. Verified detail (The pickup tube mounting bolt on a Ford 302 typically torques to 10-12 ft-lbs, not 15-18 ft-lbs. The higher value is excessive for this small fastener.): Install the 1 mounting bolt to secure the pickup tube bracket to the pump and tighten to 10-12 ft-lbs.
13. 13

    Install oil pan gasket and pan
    Apply a thin bead of RTV silicone at the front and rear corners where the timing cover and rear main cap meet the block (these are common leak points). Position the new oil pan gasket on the block, ensuring all bolt holes align. If using a cork gasket, apply a thin coat of RTV to both sides. Carefully raise the oil pan into position and start all bolts by hand. Tighten the oil pan bolts in a crisscross pattern working from the center outward to factory specification (verify against factory manual; typically 7-9 ft-lbs / 90-108 in-lbs). Do not overtighten as this can distort the pan and cause leaks. Do not overtighten as this can distort the pan and cause leaks. Verified detail (Factory torque specification for oil pan bolts on 1972 Ford F-100 302 V8): 9.0 lb-ft (12.0 Nm)
14. 14

    Reinstall distributor
    Rotate the engine crankshaft to position number 1 cylinder at top dead center on the compression stroke if timing marks were lost. Insert the distributor into the engine block with the rotor positioned according to the marks made during removal. The intermediate shaft will engage with the distributor drive gear and may cause the rotor to rotate slightly as the distributor drops into place. Adjust the distributor position to align with your reference marks, install the hold-down clamp, and tighten the bolt finger-tight. Final timing adjustment should be performed after startup.
15. 15

    Complete reassembly
    If the engine was raised, carefully lower it back onto the motor mounts and reinstall any mount bolts removed. Reinstall the front crossmember or stabilizer bar if it was removed. Install the oil drain plug with a new crush washer if available and tighten to 15-25 ft-lbs. Install a new oil filter and hand-tighten plus 3/4 turn. Lower the vehicle from jack stands. Verified detail (Factory torque specification for oil drain plug on 1972 Ford F-100 302 V8): 26.0 lb-ft (35.0 Nm)

Reassembly

1. Refill engine with 5 quarts of 10W-30 or 10W-40 conventional engine oil.
2. Reconnect negative battery cable.
3. Start the engine and immediately check for oil pressure on the gauge. Oil pressure should register within 10-15 seconds. If no pressure appears, shut down immediately and investigate.
4. Allow engine to idle for 5 minutes while checking for leaks around the oil pan and oil filter.
5. Shut off engine, wait 5 minutes, and check oil level. Add oil if necessary to bring to full mark on dipstick.
6. Check and adjust ignition timing to specification (typically 6-10 degrees BTDC at idle with vacuum advance disconnected).
7. Test drive vehicle and recheck for leaks after reaching operating temperature.

Verification

• Oil pressure gauge shows normal pressure (40-60 psi at 2000 rpm when warm, 10-15 psi at idle).
• No oil leaks visible from oil pan gasket, oil pump area, or oil filter after test drive.
• Engine runs smoothly without unusual noises from the oil pump or valvetrain.
• Oil level remains stable on dipstick after test drive (no excessive consumption indicating internal leaks).
• Distributor timing is set correctly and engine idles smoothly.

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