Ford Bolt Torque Values

[Jerry Cowing]

Ford Bolt Torque Values

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Don't know why there are specs for the exhaust manifolds/headers on the big blocks, but not on the other blocks. Here's some numbers and a calculator:

Bolt Torque Calculator http://www.futek.com/boltcalc.aspx

Bolt Torque Spec Chart for Ford

260, 289, 302
Fastener Type Torque Spec
Main cap bolts 60-70 ft.-lbs.
Outer main cap bolts 35-40 ft.-lbs.
Connecting rod bolts 19-24 ft.-lbs. (40-45 ft.-lbs. for 289 HP Boss 302)
Cylinder head bolts 65-72 ft.-lbs.
Rocker arms 17-23 ft.-lbs.
Intake manifold bolts 23-25 ft.-lbs.
Oil pump bolt 23-28 ft.-lbs.
Cam bolts 40-45 ft.-lbs.
Cam thrust plate bolts 8-10 ft.-lbs.
Harmonic damper bolts 70-90 ft.-lbs.
Flywheel/flexplate bolts 75-85 ft.-lbs.
Pressure plate bolts 35 ft.-lbs.
Front cover bolts 12-15 ft.-lbs.

351W
Fastener Type Torque Specs
Main cap bolts 95-105 ft.-lbs.
Connecting rod bolts 40-45 ft.-lbs.
Cylinder head bolts 90-100 ft.-lbs.
Rocker arms 17-23 ft.-lbs.
Intake manifold bolts 23-25 ft.-lbs.
Oil pump bolt 23-28 ft.-lbs.
Cam bolts 40-45 ft.-lbs.
Cam thrust plate bolts 8-10 ft.-lbs.
Harmonic damper bolt 70-90 ft.-lbs.
Flywheel/flexplate bolts 75-85 ft.-lbs.
Pressure plate bolts 35 ft.-lbs.
Front cover bolts 12-15 ft.-lbs.


351C, 351M
Fastener Type Torque Spec
Main cap bolts 95-105 ft.-lbs.
Connecting rod bolts 40-45 ft.-lbs. (45-50 ft.-lbs. for Boss 351C)
Cylinder head bolts (follow factory torque sequence)105 ft.-lbs. (125 ft.-lbs. for Boss 351C)
Rocker arms (non-adjustable) 18-22 ft.-lbs.
5/16 in. intake manifold bolts 21-25 ft.-lbs.
3/8 in. intake manifold bolts 28-33 ft.-lbs.
Oil pump bolt 25 ft.-lbs.
Cam bolts 40-45 ft.-lbs.
Cam thrust plate bolts 9-12 ft.-lbs.
Harmonic damper bolt 70-90 ft.-lbs.
Flywheel/flexplate bolts 75-85 ft.-lbs.
Pressure plate bolts 35 ft.-lbs.
Front cover bolts 12-18 ft.-lbs.

429-460
Fastener Type Torque Spec
Maincap bolts 95-105 ft.-lbs.
Connecting rod bolts 40-45 ft.-lbs.
Cylinder head bolts 140 ft.-lbs.
Rocker arms (non-adjustable) 18-22 ft.-lbs.
Intake manifold bolts 25-30 ft.-lbs.
Oil pump bolt 25 ft.-lbs.
Cam bolts 40-45 ft.-lbs.
Harmonic damper bolt 70-90 ft.-lbs.
Flywheel/flexplate bolts 75-85 ft.-lbs.
Pressure plate bolts 35 ft.-lbs.
Front cover bolts 12-18 ft.-lbs.



360, 390, 406, 427, 428 FE
Fastener Type Torque Spec
Main cap bolts 95-105 ft.-lbs.
Crossbolts for 406 and 427 40 ft.-lbs.
Connecting rod bolts 40-45 ft.-lbs. (53-58 ft.-lbs. for 406 and 427)
Cylinder head bolts 80-90 ft.-lbs. (100-110 ft.-lbs. for 1963-67 427)
Rocker arm shaft bolts 40-45 ft.-lbs.
Intake manifold bolts 32-35 ft.-lbs.
Exhaust manifold 18-24 ft.-lbs.
Oil pump bolt 12-15 ft.-lbs.
Cam bolts 40-45 ft.-lbs.
Harmonic damper bolt 70-90 ft.-lbs.
Flywheel/flexplate bolts 75-85 ft.-lbs.
Pressure plate bolts 35 ft.-lbs.
Front cover bolts 12-15 ft.-lbs.

[wlewis]

What are the 351W torque specs for the 2 bolts connecting the thermostat housing to the manifold? I'm not sure what the proper name of those bolts would be so I don't know that they are listed on the above chart. Incidently, as for small block header bolts, I have an original Ford High Performance Supplemental owners manual. The exhaust manifold torque limits are as follows:
289 HiPo 13-18 lbs
427 and 428 12-18 lbs

Walter

[eliminator]

On most engines it is pretty much impossible to torque every header bolt....better get used to the "feel factor" when installing the header bolts.

[pbrown]

As my uncle Jerry used to say "Tighten it 'til it gets loose again and back off half a turn".

[Jerry Cowing]

Walter

You need to look at the bolt-head and use the attached table to determine the torque required. The bolt for the thermostat housing is usually the lowest grade 3/8 inch bolt (no bolt-head markings = number 1 or 2 grade bolt), so you will want to use a torque of 18 or 20 ft/lbs depending on the number of thread per inch (16 or 24 threads per inch).

Be careful that someone not knowledgable in bolt torque values didn't change the bolt to a stronger bolt. If they changed your thermostat bolts to a stronger bolt, you may strip the threads in the aluminum intake manifold before you reach the maximum torque value of the bolt. Not a good thing to do.

[wlewis]

Thanks Jerry. Great info!
Walter