Ford 302 Intake Manifold Torque Sequence and Diagram
Ford 302 Windsor intake sequence with the verified 12-bolt layout, Ford Racing 5-10 and 15-18 lb-ft stages, fit checks, sealant and retorque guidance.
For the Ford Racing small-block crate-long-block combination documented in instruction IS-1850-0381, use 12 Grade 8, 5/16-18 intake bolts with flat washers. Oil each bolt thread, hand-start all 12, tighten in Ford's numbered order to 5-10 lb-ft, then repeat at 15-18 lb-ft. Repeat the final stage until the readings stabilize, and Ford directs a cold retorque after 10 complete heat cycles for that assembly. In the Ford figure, the upper row is 5-1-9-11-3-7 and the lower row is 6-4-12-10-2-8. This is not a universal value for every production 302, aftermarket head, manifold, gasket or fastener kit.
The Ford 302 Windsor intake spans two cylinder-head faces and seals air, oil and coolant at the same time. A leak can show up as a high idle, lean fuel trim, oil consumption, coolant loss or contamination in the lifter valley. The final wrench number matters, but it cannot correct a manifold that bottoms on the end rails, has inadequate bolt engagement or uses the wrong port gasket.
Ford Racing's crate-long-block instruction is unusually useful because it publishes both the physical sequence and the preparation measurements. It calls for a 0.040-inch minimum dry-fit gap at the end rails, at least 0.625 inch of bolt-thread engagement, Grade 8 fasteners, flat washers, specific sealing steps and two torque stages. Those details define the procedure just as strongly as the 15-18 lb-ft final range.
A separate Ford Performance 347 sealed-engine handbook lists 18-20 lb-ft with Loctite 242 for its named hardware. That nearby but different Ford value is evidence against treating any internet chart as universal. Keep the installed head, gasket, manifold and fastener instructions together, and never mix one source's lubricant with another source's torque.
Interactive Ford 302 12-bolt intake sequence
Branded downloads includedPNG and PDF exports carry the TorqueSheet logo, torquesheet.com, source-page URL, and republishing attribution request. The PDF source link is clickable.
Ford Racing figure transcribed in its top-view orientation: upper row 5-1-9-11-3-7 and lower row 6-4-12-10-2-8. Tighten numerically 1 through 12 at every stage; identify the distributor/front end before starting.
Ford 302 Intake Manifold Torque Sequence Diagram
| APPLICATION / ITEM | SPECIFICATION | NOTES |
|---|---|---|
| Ford Racing stage 1 | 5-10 lb-ft | Seat all 12 in sequence |
| Ford Racing stage 2 | 15-18 lb-ft | About 20-24 N-m; repeat until stable |
| Published SI caution | 31-34 N-m printed | Does not convert from 15-18 lb-ft; verify before SI use |
| Specified bolts | 5/16-18 UNC Grade 8 | 12 bolts with flat washers |
| Minimum engagement | 0.625 in / 5/8 in | Measure from manifold to bottom of washer |
| Minimum dry-fit rail gap | 0.040 in | Prevents manifold bottoming on block end rails |
Ford's instruction prints 31-34 N-m beside the 15-18 lb-ft final stage, but those units do not mathematically agree: 15-18 lb-ft converts to approximately 20-24 N-m. This page preserves the stated lb-ft range and flags the discrepancy instead of silently combining mismatched units. Confirm the latest Ford/component sheet before using SI units. The diagram is an original interactive transcription of Ford's physical sequence.
How to use this specification correctly
- 01
Confirm a Windsor-family 289/302/5.0L-style 12-bolt intake flange and identify the exact cylinder heads, manifold part number, gasket set and bolt kit. Exclude Coyote/Boss 302 modular hardware, Cleveland-family heads and EFI plenum fasteners before using this sequence.
- 02
Place each intake gasket against both the head and manifold to compare every runner, water opening and bolt hole. Ford warns that some aftermarket manifolds do not match Ford Racing heads; a bolt pattern that aligns does not prove the ports align.
- 03
Inspect the manifold for casting debris, damaged sealing faces and shallow threaded accessory holes. Test-fit the carburetor or throttle body and operate the linkage to confirm that blades do not contact the manifold.
- 04
Mock up the intake on the long block without intake gaskets. Measure the gap between the manifold and block end rails; the cited Ford procedure requires at least 0.040 inch so the manifold cannot bottom out before the head gaskets are clamped.
- 05
Select 12 Grade 8, 5/16-18 UNC bolts and flat washers for the cited combination. Measure engagement individually from the manifold surface to the bottom of the washer; Ford requires at least 0.625 inch, while a bolt must also remain short enough not to bottom in its hole.
- 06
Clean the head flanges, manifold faces and block end rails with residue-free cleaner on lint-free material. Keep solvent, old gasket and abrasive particles out of the runners and lifter valley.
- 07
Apply the contact-cement-type sealer to the head flange and head side of the intake gasket as Ford directs. Use the specified EGR gasket or block-off, apply a thin RTV film to mating end-rail surfaces, then a substantial continuous RTV bead on the block rails and into all four corners.
- 08
Apply the specified thin RTV film around the four water openings, lower the manifold straight down and avoid sliding it across the gasket. Put one drop of oil on each bolt thread, install the flat washers and hand-start all 12 fasteners.
- 09
Orient the diagram with the distributor/front end at left. Complete positions 1 through 12 at 5-10 lb-ft, then repeat the full sequence at 15-18 lb-ft. Re-run the final sequence until the torque readings stop falling as the gasket and RTV settle.
- 10
Respect sealant cure time, refill coolant and inspect before startup. For the cited Ford Racing assembly, complete 10 cold-to-operating-temperature heat cycles, let the engine cool fully and retorque in sequence. Use a different retorque rule only when the installed gasket/manifold instructions explicitly replace Ford's procedure.
The verified Ford 302 sequence
Ford's figure places positions 5, 1, 9, 11, 3 and 7 across the upper physical row, with 6, 4, 12, 10, 2 and 8 across the lower row. Tightening numerically begins near the central area and alternates across the two head faces before moving outward. This spreads gasket compression instead of clamping one bank or one end first.
Mark the distributor/front end on the engine and the screen before work begins. Complete all 12 positions at stage 1, reset the wrench and repeat all 12 at stage 2. A paint pen and written stage log prevent a phone call or tool change from turning into a missed or double-tightened bolt.
A unit mismatch in the Ford instruction
IS-1850-0381 pairs 15-18 lb-ft with 31-34 N-m. Those ranges are not equivalent: standard conversion gives roughly 20-24 N-m for 15-18 lb-ft, while 31-34 N-m is roughly 23-25 lb-ft. Publishing both without comment would create a large clamp-load difference depending on which unit the technician chooses.
The safest presentation is to preserve Ford's imperial range, explicitly disclose the mismatch and ask an SI-only technician to verify the latest Ford Performance instruction for the exact engine. Never choose the larger number because it appears more conservative; Ford separately warns that overtightening 302/351W intake bolts can contribute to head-gasket sealing problems.
Why dry-fit rail clearance matters
The two angled intake faces should provide clamp load; the front and rear block rails are sealed by RTV. If the manifold touches a rail first, the torque wrench can click while the port gaskets remain lightly loaded. Ford associates that condition with oil being drawn into the intake runners.
Check without gaskets and measure at both ends. Less than 0.040 inch in the cited combination calls for correcting manifold geometry, not simply using a thinner bead or adding torque. Resurfaced heads, a decked block or mixed castings make this check especially important.
Bolt grade, engagement and friction
Ford's torque is written around Grade 8 5/16-18 fasteners with flat washers and a drop of oil on the threads. Lower-grade bolts, flange-head hardware, studs, different washers, dry threads, anti-seize or threadlocker change the relationship between wrench torque and bolt tension.
At least 0.625 inch of engagement protects the cylinder-head threads in the cited setup, but blindly installing a longer bolt risks bottoming. Measure each location with the washer stack included. Any bolt that becomes tight before its washer contacts the manifold must be removed and investigated rather than torqued through the resistance.
Gaskets, RTV and water ports
- Do not use cork end-rail gaskets in the cited Ford Racing procedure.
- Confirm runner, bolt and water-port alignment on both the head and manifold before sealer is applied.
- Use contact-cement-type sealer only on the surfaces Ford identifies.
- Work a continuous RTV bead into all four intake-gasket/end-rail corners.
- Apply the specified thin RTV treatment around all four water openings.
- Lower the intake vertically so the bead and port gaskets are not displaced.
- Respect the sealant manufacturer's assembly window and cure time before adding coolant or running the engine.
Ford 302 intake-installation checklist
- Windsor 12-bolt engine family confirmed
- Head and manifold part numbers recorded
- Port, water and bolt holes aligned
- Carburetor or throttle linkage checked
- Manifold clean and damage-free
- Dry-fit end-rail gap at least 0.040 inch for cited setup
- Twelve Grade 8 5/16-18 bolts and flat washers verified
- Every bolt has at least 0.625 inch engagement without bottoming
- Cork end seals omitted for cited Ford procedure
- Correct contact sealer and RTV applied
- Threads receive the specified drop of oil
- Physical sequence oriented to distributor/front end
- 5-10 lb-ft pass recorded
- 15-18 lb-ft passes repeated until stable
- Cold retorque after 10 heat cycles scheduled only for cited system
- Vacuum, coolant and oil checks completed
Ford 302 / 5.0L Windsor small-block V8 specifications can change by model year, engine, platform, wheel, and installed component. Confirm the VIN or engine identity, part numbers, fastener condition, and the current manufacturer instructions before service.
Ford 302 Intake Manifold Torque Sequence and Diagram FAQs
What is the Ford 302 intake-manifold torque?+
For the cited Ford Racing crate-long-block installation, use 5-10 lb-ft first and then 15-18 lb-ft with oiled Grade 8 5/16-18 bolts and flat washers. Other manifolds and fasteners can specify different values.
What is the Ford 302 intake bolt sequence?+
In Ford's illustrated top view, the upper physical row is 5-1-9-11-3-7 and the lower row is 6-4-12-10-2-8. Tighten numerically from 1 through 12 at each stage.
Is 15-18 lb-ft equal to 31-34 N-m?+
No. It converts to approximately 20-24 N-m. Ford's cited sheet prints inconsistent paired units, so this page preserves the lb-ft specification and flags the discrepancy for verification.
How many intake bolts does a Ford 302 Windsor use?+
The conventional layout shown here uses 12, six per cylinder head. Verify aftermarket and specialty heads by part number before assuming this pattern.
Should Ford 302 intake bolt threads be oiled?+
Ford Racing specifies one drop of oil on the 12 bolt threads for this procedure. Do not combine that torque with dry threads, anti-seize or Loctite unless the installed component instructions call for that condition.
Do I use the cork intake end seals?+
Not in the cited Ford Racing crate-long-block procedure. It uses RTV on the block end rails and at the four gasket corners. Follow the installed gasket/manifold instructions if they differ.
Why measure the intake end-rail gap?+
Ford requires at least 0.040 inch in its dry-fit check so the manifold does not bottom on the block rails before it clamps the head gaskets. Bottoming can create an internal oil leak.
Does a Ford 302 intake need retorquing?+
Ford Racing directs a cold retorque after 10 complete heat cycles for the cited assembly. Do not transfer that rule to a no-retorque gasket or another manifold without its manufacturer's approval.
Technical sources
TorqueSheet favors engine- and component-specific manufacturer instructions over unsourced universal values.
1Ford Racing intake-manifold instructions for small-block crate long blocksFord's eight-page installation sheet establishes the 12-position physical sequence, Grade 8 hardware, fit checks, 5-10 and 15-18 lb-ft stages and its cold ten-heat-cycle retorque rule.↗2Ford Performance 347 Series Sealed Engine HandbookFord publishes an 18-20 lb-ft intake value with Loctite 242 for its named 347 sealed-engine hardware, demonstrating that lubricant and exact engine/component combination control the value.↗3Edelbrock Performer 302 intake-manifold application notesThe component maker identifies its Windsor 302 application and requires the specified gasket treatment, RTV end rails and hardened washers under the aluminum manifold fasteners.↗