View Full Version : 1956 T-Bird engine bolt torque spec's
840 840 840
10-07-2014, 12:43 PM
I'm at a total loss, been trying to find all the bolt torque spec on my 1956 292 Y-block and I just can't seem to find them, anyone have a quick guide to heads and valve train???
10-07-2014, 02:56 PM
Torque specs are different, depending on what lube and bolts you use. ARP bolts have their own torque specs when used with their moly lube. CLICK HERE (http://arpinstructions.com/generaltorque.html) for their chart.
In my engine building experience (before ARP came around), I always chase the threads, clean out the holes and check for depth clearance. I mix STP with 10W-30 oil in a cup with a small brush so that the consistency just hangs onto the bolt. I brush a little into the female threads and I coat the bolt threads. That takes care of my moly lube.
For bolts that pass through water jackets, I dry the bolts and use a Teflon pipe paste (PTFE), available at all the box stores.
Your head bolts are 7/16" diameter grade 6, not 1/2" grade 8. Be careful not to over tighten them or one will break, like this one did: CLICK HERE (http://home.comcast.net/~y-block/Y-Block/BrokenHeadBolt/) Yes, I've been there.
The Service Manual for your engine says the following:
Head bolts - 75 Ft/lbs. (hot). (I wouldn't go passed 70)
Intake Manifold - 23-28Ft/lbs.
Rocker Shaft to Cylinder Head - 12-15Ft/lbs. (I would go to 20)
Valve Rocker Arm Adjusting Nut - 30-35Ft/lbs.
I hope you cleaned out your rocker shafts & rocker arms, slotted the oil holes,
and plugged that bypass tube on the end (to pressurize the shaft):
840 840 840
10-07-2014, 03:33 PM
Thanks Dave, I can go back to work.
10-08-2014, 10:46 PM
You should buy a shop manual. All the specs you need, including torque specs, are in there.
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