Cylinder Head Resurface

Remove, inspect, and machine cylinder heads on a 1972 Ford F-100 302ci V8, including disassembly of valvetrain components, head removal, machine shop preparation, reinstallation, and timing/valvetrain adjustment.

Warnings

Tools required

Parts

• Cylinder head gasket set (includes intake/exhaust gaskets) × 1 — Fel-Pro 7733PT or equivalent
• Intake manifold gasket set × 1 — Fel-Pro MS90018 or equivalent
• Valve cover gaskets × 2 — Cork or rubber composite
• Valve stem seals (if replacing) × 1 — 16 seals, positive lock type
• Head bolts (if reusing, inspect for stretch) × 1 — Use OEM specification
• Antifreeze coolant (ethylene glycol green) × 1 — Concentrated, mix 50/50

Fluids

• Ethylene glycol green 50/50 — 15 qt
• 10W-30 or 10W-40 conventional engine oil — 5 qt

Preparation

1. Disconnect negative battery cable and secure away from battery post
2. Drain cooling system completely by opening radiator petcock and removing lower radiator hose
3. Remove air cleaner assembly and label all vacuum hoses with tape flags
4. Label and disconnect all spark plug wires, storing in order
5. Take reference photos of ignition timing marks, distributor position, and rotor orientation before disassembly

Procedure

1. 1

   Remove intake manifold
   Disconnect fuel line at carburetor and plug open line. Remove carburetor linkage, throttle cable, and PCV valve. Unbolt and remove intake manifold (12 bolts total on Ford 302 intake manifold). Lift manifold straight up to avoid damaging gasket surfaces. Remove and discard intake manifold gaskets.
2. 2

   Remove exhaust manifolds
   Working from underneath vehicle if necessary, disconnect exhaust pipes from exhaust manifolds at flange (2 bolts per side). Remove exhaust manifold bolts (typically 4 bolts per manifold — verify for your casting) and remove both exhaust manifolds. Inspect manifold studs for damage.
3. 3

   Remove valve covers and rocker assemblies
   Remove valve cover bolts (typically 5 bolts per cover on 302 — verify) and lift off valve covers. Loosen rocker arm nuts and remove rocker arms and fulcrum seats from their studs. Keep all components organized and labeled by cylinder position. Remove each rocker arm and fulcrum seat individually. Store components in order or label by cylinder position to ensure reinstallation in original locations. Verified detail (The 1972 Ford 302 does NOT use a rocker shaft assembly. It uses individual stud-mounted, non-adjustable (or rail) rocker arms with a single fulcrum bolt per rocker (positive-stop bolts). This is a significant platform error — there is no rocker shaft on a small-block Ford 302.): Remove each rocker arm fulcrum bolt (one bolt per rocker arm, 16 total). Lift off each rocker arm and fulcrum seat individually. Keep all rocker arms in order and labeled by cylinder and intake/exhaust position.
4. 4

   Remove pushrods and identify
   Pull out all 16 pushrods (8 per bank) and store in order using a labeled cardboard template or magnetic tray numbered 1-8 for each side. Inspect each pushrod by rolling on flat surface to check for bending. Measure pushrod length; standard Ford 302 pushrods are approximately 8.55 inches long for reference.
5. 5

   Remove cylinder head bolts
   Starting from the outer bolts and working toward the center, loosen all cylinder head bolts gradually in a crisscross pattern (each head has 10 head bolts on Ford 302). Remove bolts completely and store in order if reusing. Inspect bolt threads and under-head surfaces for damage or necking.
6. 6

   Remove cylinder heads
   Carefully break loose cylinder heads using a pry bar on casting ears only—never pry on gasket surfaces. Lift heads straight up to avoid dragging across deck surface. Place heads on clean wooden blocks with combustion chambers facing up. Remove and discard head gaskets. If heads are stuck, tap gently with rubber mallet on casting boss areas only.
7. 7

   Inspect cylinder heads and block deck
   Using straightedge and feeler gauge, check cylinder head flatness across multiple angles (lengthwise, crosswise, and diagonally). Measure any gap under straightedge; warpage exceeding 0.003" across entire surface requires machining. Check block deck surface similarly. Inspect for cracks around valve seats and combustion chambers. Note: Ford 302 heads typically allow maximum 0.010" total material removal over head lifetime.
8. 8

   Clean and prepare heads for machine shop
   Remove all carbon deposits from combustion chambers using plastic scraper and wire brush. Clean all bolt holes with thread chaser or tap. Remove any remaining gasket material from head deck surface using plastic scraper only—no metal scrapers. Clean oil passages and coolant ports thoroughly. If valve work is needed, disassemble valvetrain using valve spring compressor and bag all parts with head.
9. 9

   Machine shop work (external service)
   Transport heads to machine shop for resurfacing. Specify: surface grind to remove warpage (do not exceed 0.010" total removal), magnaflux crack inspection, valve seat inspection, and pressure test. Request final surface finish of 60-80 RA for proper gasket sealing with composition head gaskets. If valve work performed, ensure proper spring pressure and seat width specifications for 302.
10. 10

    Clean block deck surface
    While heads are at machine shop, thoroughly clean engine block deck surface using plastic scraper. Remove all old gasket material without scratching surface. Clean out all head bolt holes using brake cleaner and compressed air—any debris or oil in bolt holes will cause false torque readings. Verify deck surface flatness same as heads (under 0.003" warpage acceptable). Cover exposed cylinders with clean rags to prevent debris entry.
11. 11

    Install new head gaskets
    Remove protective rags from cylinders. Ensure all surfaces are clean and dry. Position new head gaskets over dowel pins on block deck—gaskets are typically marked "FRONT" and "TOP". Verify coolant and oil passage holes align perfectly. Do not use gasket sealer on composition head gaskets unless specifically required by gasket manufacturer.
12. 12

    Install cylinder heads
    Carefully lower cylinder heads onto block, aligning over dowel pins. Ensure heads seat fully on gaskets without shifting gasket position. Hand-thread all 10 head bolts per side. If reusing bolts, lightly oil threads and under-head surfaces. If using new bolts, follow manufacturer's lubrication instructions.
13. 13

    Torque cylinder head bolts
    Torque head bolts in three progressive stages following proper sequence (start at center, work outward in spiral pattern). First pass: torque all bolts to 25 ft-lbs. Second pass: torque all bolts to 45 ft-lbs. Final pass: torque all bolts to 65-72 ft-lbs. Allow engine to sit for 30 minutes, then perform final torque check at 65-72 ft-lbs following same sequence. Note: Some Ford 302 applications specify different torque values; verify for your specific engine configuration.
14. 14

    Install pushrods and rocker assemblies
    Apply assembly lube or engine oil to pushrod ends. Install pushrods in their original positions, seating lower ends fully in lifter cups. Position each rocker arm over its pushrod and valve stem, ensuring the pushrod engages the rocker arm cup properly. Install each rocker arm fulcrum bolt and torque to 17-23 ft-lbs. Verified detail (The 1972 Ford 302 uses individual stud-mounted rocker arms with adjusting nuts, not rocker shaft assemblies with pedestal bolts.): Install each rocker arm and fulcrum seat onto its respective stud, ensuring pushrods engage the rocker arm sockets properly. Hand-thread the rocker arm adjusting nuts onto the studs.
15. 15

    Adjust valve lash (if applicable)
    The 1972 302 uses non-adjustable positive-stop rocker fulcrum bolts. With the lifter on the base circle of the cam, simply torque each fulcrum bolt to 17-23 ft-lbs; the positive-stop design sets correct hydraulic lifter preload automatically. If aftermarket adjustable rockers are installed, adjust each to zero lash then turn the nut an additional 1/2 to 3/4 turn. Once adjusted, torque the rocker arm nut to 18-20 ft-lbs while holding the adjustment. Rotate engine manually using breaker bar on crankshaft bolt, adjusting valves in firing order sequence as each lifter is on base circle of cam. Firing order for 1972 Ford 302: 1-5-4-2-6-3-7-8 (verify — later 5.0L HO/roller engines use a different order).
16. 16

    Install exhaust manifolds
    Clean exhaust manifold mating surfaces and install new exhaust gaskets if used (some 302 applications use no gaskets). Install exhaust manifolds and torque bolts to 18-24 ft-lbs working from center outward. Reconnect exhaust pipes to manifold flanges with new gaskets and torque flange nuts to 25-30 ft-lbs.
17. 17

    Install intake manifold
    Apply thin bead of RTV silicone at front and rear block-to-manifold junctions (where end seals meet side gaskets). Install new intake manifold gaskets and end seals. Carefully lower intake manifold into position, ensuring all gaskets remain aligned. Hand-start all 12 intake manifold bolts. Torque intake manifold bolts to 23-25 ft-lbs in two stages, working from center outward in spiral pattern. Allow RTV to cure per manufacturer instructions before adding coolant.
18. 18

    Install valve covers and accessories
    Install new valve cover gaskets (apply small dab of RTV at front corners if using cork gaskets). Install valve covers and torque bolts to 3-5 ft-lbs—do not overtighten. Reinstall carburetor, fuel line, linkage, vacuum hoses per reference photos, PCV valve, air cleaner, and all accessories.
19. 19

    Fill cooling system and check for leaks
    Close radiator petcock and reconnect all coolant hoses. Fill cooling system with proper 50/50 mix of ethylene glycol antifreeze and distilled water (approximately 15 quarts total capacity). Leave radiator cap off. Start engine and allow to warm up to operating temperature while monitoring for leaks around head gaskets and intake manifold. Add coolant as level drops during burping process. Install radiator cap once system is fully burped and at operating temperature.
20. 20

    Set ignition timing and perform final checks
    Reconnect negative battery cable. Install spark plugs (if removed) and torque to 15 ft-lbs. Reconnect spark plug wires per reference photos. Using timing light, set initial timing to the value specified on the underhood emissions decal for your specific 1972 302 calibration (commonly around 6 degrees BTDC — always verify on the decal). Check and adjust idle speed and mixture as needed. Check oil level and top off if necessary after engine reaches operating temperature.

Reassembly

1. After first heat cycle (engine reaches full operating temperature and cools completely), re-torque cylinder head bolts to final specification
2. Check valve adjustment after 500 miles of operation; hydraulic lifters may require minor adjustment as components seat
3. Monitor coolant level for first week of operation and top off as system fully purges air
4. Inspect for oil leaks around valve covers and intake manifold after first few drives; retorque valve cover bolts if seepage occurs

Verification

• Engine starts easily and idles smoothly without misfiring or unusual noises
• No coolant leaks visible around cylinder heads, intake manifold, or hoses after reaching operating temperature
• No oil leaks from valve covers or intake manifold valley after test drive
• Engine oil remains clean without coolant contamination (check dipstick and oil cap)
• Cooling system maintains proper operating temperature without overheating
• No exhaust leaks audible at exhaust manifold gaskets
• Valve train operates quietly without ticking or tapping noises indicating proper adjustment

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