Head Bolts.

[L.Fure]

Until my shop manual gets here I need to know what the torque value for the head bolts. I'm thinking that the person that rebuilt the engine didn't re-torque the bolts before he sold it. I would also like to know what the valve tappet clearances are. If the previous own had the valves ground during the rebuild they may have seated in by now and closed the tappet clearance some.

 

[R Geiger]

0.010-0.012 for intakr
0.014-0.16 for exhaust
65-70ft-lbs for head bolts

 

[L.Fure]

(quoted from post at 15:46:46 08/25/17)
0.010-0.012 for intakr
0.014-0.16 for exhaust
65-70ft-lbs for head bolts

Thanks for the answers to my questions.

 

[Den N Ms]

For cylinder head nuts with head studs 50-55 FT LBS.

 

[L.Fure]

Mine looks like bolts, but I'll make sure to check before I start hogging on them with a torque wrench.

 

[Tim PloughNman Daley]

Don't wait for any manual, even if your head originally had studs, many get swapped out for head bolts so best to determine now what you have and proceed from there. Remove one or two fasteners and determine if studs or hex head bolts are used. Torque value is different for each. Sequence matters too. Torqueing is done correctly in three steps. Take final spec, divide by 3, and start at lowest setting, follow sequence diagram, then re-set to next setting and repeat, then set to final value and repeat sequence. Run engine good and hot, let cool down and come back later, next day, next week, and re-torque with cold engine/head. It is also advisable to know the proper procedure on using a torque wrench. NEVER issue one to loosen a fastener with -that will mess up the gearing and eventually give false readings. Know the difference between Inch-Ounces; Inch-Pounds; and Foot-Pounds. The Metric Torque scale is in Newton-Meters and most modern torque wrenches today have all the scales or at least Foot-Pounds and Newton-Meters. It is very important you use the correct scale and settings. There are formulas for converting one to the other too. Here is the torque sequence and values for both the stud nuts and hex head bolts from the I&T F-04 Manual:

HEAD TORQUE VALUES & SEQUENCE:

Tim Daley(MI)

 

[Tim PloughNman Daley]

My scans didn't do so well, but see if this one is better...

TPD

 

[L.Fure]

Your scan was a bit large, so I shrunk it down to size, I think.

 

[L.Fure]

I forgot to ask a question in my last posting. Should I loosen all the head bolts and start over?

 

[R Geiger]

(quoted from post at 08:35:02 08/26/17)
I forgot to ask a question in my last posting. Should I loosen all the head bolts and start over?

NO, just retorque them, warm motor.

 

[Tim PloughNman Daley]

Determine what you have first -hex nuts or hex bolts -it matters -they each have a different thread pitch size. Nuts are fine thread, bolts are coarse thread. Coarse thread ALWAYS screws into cast iron. Torque when head is cold. If warm or hot you will get false readings that is how the head gets warped...Also, old worn threads give false readings and lube affects readings.

TPD
TORQUE VALUES