Ford 302 Flywheel Bolt Torque Pattern Diagram
Ford 302 six-bolt flywheel pattern with Ford Performance 75-85 lb-ft guidance, balance checks, dowels and bellhousing runout.
Ford Performance specifies hand-torquing 302/351W flywheel-to-crankshaft bolts to 75-85 lb-ft. On the matching six-bolt flange, start every bolt and tighten in an opposite-side 1-4-2-5-3-6 pattern through staged passes. The 347 sealed-engine branch narrows its own hardware to 75-80 lb-ft with Loctite 242 or dry-seal. Use the specification and thread treatment for the exact flywheel, bolts and crankshaft.
The flywheel or flexplate is both a rotating engine component and the connection to the clutch or torque converter. Uneven seating at the crank flange can create runout, starter-ring-gear problems, vibration or bolt fatigue. For the Ford 302 / 5.0L Windsor, the correct value is inseparable from crank flange, fastener, thread treatment and installed transmission hardware.
Ford's catalog gives a broad production/performance 302/351W range, while its 347 handbook defines a narrower branch with named thread treatment. Follow one complete branch rather than combining the highest torque with the slickest lubricant.
The interactive pattern alternates across the bolt circle to draw the part onto the crank flange evenly. It is a tightening controller, not a claim that every engine carrying the same family name has the same bolt count. Compare the actual flange, service illustration and replacement-part instructions before applying torque.
Interactive Ford 302 / 5.0L Windsor crank-flange sequence
STAR PATTERN
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A 6-fastener opposite-side controller. Select 1 through 6; the physical labels around the circle are 1-4-2-5-3-6. Confirm that the installed flange matches.
Ford 302 Flywheel Bolt Torque Pattern Diagram
| APPLICATION / ITEM | SPECIFICATION | NOTES |
|---|---|---|
| Ford 302/351W | 75-85 lb-ft | Ford Performance driveline tip |
| 347 sealed engine | 75-80 lb-ft | Loctite 242 or dry-seal |
| Pattern | 1-4-2-5-3-6 | Opposite-side controller |
| Balance | Application-specific | 28.2, 50 oz-in or neutral |
Ford small-block flywheels also differ by 28.2 versus 50 oz-in external balance, neutral-balance performance cranks, 157/164 tooth count and clutch pattern.
How to use this specification correctly
- 01
Confirm the engine code, crankshaft/rear-seal generation, transmission type, flywheel or flexplate part number, balance specification and fastener part number. Photograph orientation marks before removal.
- 02
Disconnect the battery and support the engine and transmission with rated equipment. A flywheel is heavy and a thin flexplate has sharp edges; use eye protection and a flywheel holding tool rather than hands or a screwdriver jammed into the ring gear.
- 03
Remove the clutch/torque-converter fasteners and transmission according to the vehicle manual. Mark converter depth before separation and keep the converter fully seated in the transmission pump.
- 04
Inspect the crank flange, register, bolt holes, rear seal, pilot bearing, ring gear and both faces of the flywheel/flexplate. Reject cracks, heat checking beyond limits, elongated holes, damaged teeth or an unapproved resurfaced thickness.
- 05
Clean mating faces so the part seats metal-to-metal. Keep oil, grease and threadlocker off friction surfaces. Chase threads only if the service procedure permits it and blow blind holes clear without spraying solvent into the engine.
- 06
Install required flywheel dowels and place the verified balance part against the crank register. Confirm bolt length does not bottom.
- 07
Hand-start all six, tighten in 1-4-2-5-3-6 stages and finish within the selected Ford branch. Then dial-check bellhousing face and bore runout as Ford directs.
- 08
Install clutch, pressure plate or converter hardware only after the crank-flange joint is complete. Use alignment dowels and the separate pressure-plate/converter torque specification.
- 09
Measure flywheel/flexplate runout where the manual requires it and rotate the crankshaft by hand. Verify starter engagement, converter freedom/endplay and bellhousing alignment before final installation.
- 10
After startup, stop for scraping, cyclic knock or abnormal vibration. Recheck accessible converter/inspection-cover work only by the application procedure; do not casually retorque sealed crank bolts after operation.
Selecting the correct application branch
Ford's catalog gives a broad production/performance 302/351W range, while its 347 handbook defines a narrower branch with named thread treatment. Follow one complete branch rather than combining the highest torque with the slickest lubricant.
A correct bolt pattern does not correct the wrong flywheel balance. Match crank imbalance, tooth count, clutch diameter and bellhousing/starter before assembly.
How the opposite-side sequence works
With 6 matching fasteners, the controller's physical labels are 1-4-2-5-3-6 around the circle. Tighten numerically so each step crosses or moves far from the previous position. Start every bolt by hand before the first staged pass.
Use several even preliminary passes when the source gives only a final torque, unless its instructions say otherwise. The final wrench pass must still follow the exact application sequence and calibrated range.
Installation procedure and verification
Install required flywheel dowels and place the verified balance part against the crank register. Confirm bolt length does not bottom.
Hand-start all six, tighten in 1-4-2-5-3-6 stages and finish within the selected Ford branch. Then dial-check bellhousing face and bore runout as Ford directs.
Mistakes that cause repeat failures
- Mixing 28.2 and 50 oz-in imbalance
- Using a Coyote eight-bolt pattern on a Windsor crank
- Skipping flywheel/pressure-plate dowels
- Using an impact wrench for final torque
- Ignoring bellhousing concentricity
Flywheel, flexplate and converter are separate joints
The crank bolts clamp the flywheel or flexplate to the crankshaft. Pressure-plate bolts clamp a clutch cover to a manual flywheel, while converter bolts connect an automatic flexplate to the torque converter. These fasteners commonly have different sizes, grades, thread treatments and torque values.
Never use the crank-flange torque for converter or pressure-plate bolts. Confirm converter seating before drawing the transmission to the engine; bellhousing bolts must not be used to force a gap closed.
Final installation checklist
- Correct balance and tooth count confirmed
- Orientation marks and crank register aligned
- New bolts/clamp ring used where required
- Mating faces clean and dry
- Specified thread treatment applied only to threads
- All bolts hand-started
- Staged opposite-side sequence completed
- Runout and pilot/bellhousing alignment checked
- Converter fully seated or clutch centered
- Engine rotates freely by hand
Ford Ford 302 / 5.0L Windsor 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 Flywheel Bolt Torque Pattern Diagram FAQs
What is Ford 302 flywheel bolt torque?+
Ford Performance's cited driveline guidance specifies 75-85 lb-ft for 302/351W.
What is the six-bolt Ford 302 sequence?+
Use the opposite-side controller 1-4-2-5-3-6, unless the exact component sheet shows another numbering layout.
Should flywheel bolts be tightened in a star pattern?+
Use the exact numbered factory figure when available. An opposite-side or crisscross staged pattern is the safe controller for a matching circular flange because it seats the part evenly.
Can flywheel bolts be reused?+
Only if the exact service manual and fastener instructions permit reuse. Torque-to-yield, coated single-use or damaged fasteners must be replaced.
Is flywheel bolt torque the same as converter bolt torque?+
No. They are separate joints with different fasteners and specifications.
Technical sources
TorqueSheet favors engine- and component-specific manufacturer instructions over unsourced universal values.
1Ford Performance driveline installation tipsFord specifies hand-torquing 302/351W flywheel-to-crankshaft bolts to 75-85 lb-ft and checking bellhousing alignment.↗2Ford Performance 347 sealed-engine handbookFord's small-block race-engine branch lists 75-80 lb-ft with Loctite 242 or dry-seal, showing why hardware and thread treatment remain application-controlled.↗3Ford Performance M-6375-C302B flywheel recordFord documents 157-tooth flywheel fitment and required pressure-plate bolts/dowels for the named component.↗