What is the head torque sequence for a big block?
This is the Head Bolt Torque Sequence (Pattern) for the Mark IV Big Blocks, Rat Motors or what ever you might lovingly call the motor. I am an old timer and had a 1969 SS 396 that subsequently got a 427. I am a fan of this motor, they make good power with only a little work and not much sounds as good a a uncorked BBC at the drags.
How do you remove a cylinder head cover?
Remove cylinder head cover no.2 Remove the 2 nuts, 2 clips and cylinder head cover. 6. Remove air cleaner hose no.1 loosen the 2 air cleaner hose clamp bolts, and remove the air cleaner hose. 7. Separate accelerator control cable assy
How do you get torque out of a small block?
It doesn’t hurt to run a tap on every bolt hole (unless for some reason you have a thread insert in them) to ensure proper torque. For some blocks you will have the bolt holes drilled through to the water jacket. Use a good sealer on the threads (ARP, Permatex) something specific for bolts.
What is the tightening sequence on a 4.3L engine?
The bolt numbering is the sequence in which they should be tightened. The first time around, torque these bolts to 25 foot-pounds, then move up to 45 foot-pounds and finally 65 foot-pounds. The intake manifold has 12 bolts that must be torqued in two steps with different sequences.
This is the Head Bolt Torque Sequence (Pattern) for the Mark IV Big Blocks, Rat Motors or what ever you might lovingly call the motor. I am an old timer and had a 1969 SS 396 that subsequently got a 427. I am a fan of this motor, they make good power with only a little work and not much sounds as good a a uncorked BBC at the drags.
Remove cylinder head cover no.2 Remove the 2 nuts, 2 clips and cylinder head cover. 6. Remove air cleaner hose no.1 loosen the 2 air cleaner hose clamp bolts, and remove the air cleaner hose. 7. Separate accelerator control cable assy
It doesn’t hurt to run a tap on every bolt hole (unless for some reason you have a thread insert in them) to ensure proper torque. For some blocks you will have the bolt holes drilled through to the water jacket. Use a good sealer on the threads (ARP, Permatex) something specific for bolts.
How much torque do you put on head bolts?
Short Head Bolts 65 – 68 Ft/Lbs I would also add make sure you torque the bolts in steps. Do a first round hand tight, second round at 50% torque (OK, let’s just say 35 Ft/Lbs) then final round at specs.
Which is the cylinder head bolt tightening sequence?
These diagrams include: Fig. Cylinder head bolt loosening sequence-2.0L Fig. Cylinder head bolt tightening sequence-2.0L Fig. Cylinder head bolt loosening sequence-2.4L Fig. Cylinder head bolt inspection-2.4L
How much torque does a small block head bolt have?
Small Block Ford Head Bolt Torque Specifications 260, 280, 302 Stage 1 : 50 Ft/Lbs Stage 2 : 60 Ft/Lbs
How much torque does a Boss 302 head bolt have?
The main thing is do the 3 stages and arrive at a final torque setting for your configuration. Small Block Ford Head Bolt Torque Specifications 260, 280, 302 Stage 1 : 50 Ft/Lbs Stage 2 : 60 Ft/Lbs Stage 3 : 70 Ft/Lbs Boss 302 Stage 1 : 45 Ft/Lbs Stage 2 : 55 Ft/Lbs Stage 3 : 70 Ft/Lbs 289HP and 351W