Max Wedge INtake Torque Settings

[fmahannah]

Is the correct torque for max wedge intake manifold bolts 25 ft lbs? This is with iron heads.

Thanks

 

[pnora]

40 ft. lbs.

 

[GTX JOHN]

I used to do 20 to 22
Too expensive an intake to risk cracking!!
It always sealed if surfaces were flat and clean

 

[fmahannah]

Yeah 40 seems high for the aluminum intake, and this is an original one. Thanks

 

[33 IMP]

I would do no more than 25 lbs on mine. Pretty standard for an aluminum intake. I might try twenty......
(How good are the threads in the max heads? Got a couple helicoils in mine.....)

 

[fmahannah]

Heads are mopar repros and threads are like new

 

[4406bbl]

The old specs were 25 or 30 depending on where you looked...I would do no more than 25 if everything fits perfect, less if it does not, or fix the bad fit.

 

[Geoff 2]

Agree, 25. You are sealing something, not a structural component. Edel recommends 25 for it's intakes.

 

[Mick56]

Chrysler "Wedge" (B & RB Series) Torque Specs​

The following specs apply to these Chrysler Big Block engines:

• B Series,
  • 350 c.i.d.
  • 361 c.i.d.
  • 383 c.i.d.
  • 400 c.i.d.
• RB Series,
  • 383 c.i.d.
  • 413 c.i.d.
  • 426 Wedge
  • 440 c.i.d.

Fastner Type​	Torque Specs​
Main Cap Bolts	85 ft.-lbs.​
Connecting Rod Bolts (Plain)	45 ft.-lbs.​
Connecting Rod Bolts (Heavy Duty)	50-55 ft.-lbs.​
Crankshaft Rear Bearing Seal Retainer Bolts	30 ft.-lbs.​
Cylinder Head Bolts	70 ft.-lbs.*​
Rocker Shaft Bracket Bolts	25 ft.-lbs.​
Intake Manifold Bolts	40 ft.-lbs.​
Oil Pump Cover Bolt	10 ft.-lbs.​
Oil Pump Attaching Bolt	35 ft.-lbs.​
Oil Pan Bolts	15 ft.-lbs.​
Cam Locking Bolt	35 ft.-lbs.​
Harmonic Damper Bolt	135 ft.-lbs.​
Flywheel/Flexplate Bolts	55 ft.-lbs.​
Flywheel Housing to Engine Block Bolts	50 ft.-lbs.​
Flexplate to Torque Converter Bolts	270 in.-lbs.​
Water Pump Bolts	30 ft-lbs.​
Fuel Pump Bolt	30 ft.-lbs.​
Starter Mounting Bolts	50 ft.-lbs.​
Exhaust Manifold Nuts	30 ft.-lbs.​

 

[GTX JOHN]

Do not try 40 with a 426 hemi unless you like to EZ out every hole in Head.

I do 40 on a cast intake but not aluminum.

Just my opinion

 

[33 IMP]

Those are specs for CAST IRON intakes. I would never, NEVER tighten a $1000 60 year old manifold anywhere near 40lbs. 25 maybe, more likely 20.

 

[fmahannah]

I did 25 and will leave it there. Thanks everyone for your answers!

 

[Geoff 2]

Once the engine has run & cooled down, I would torque again, cold. Keep repeating until you cannot tighten further.

 

[fmahannah]

Once the engine has run & cooled down, I would torque again, cold. Keep repeating until you cannot tighten further.

Ok thanks

 

[Dragon Slayer]

Is there a service manual entry for the Maxwedge. The hemi aluminum was 72in/lbsf but they are 1/4" bolts/studs