Torque sequence for headbolts


head bolts

Posted by HOWARD ROGERS on Sunday, February 18, 2001

Could someone please help me find the seaquence and torqe on a flathead 6 ?

Posted by Cheyenne Dave on Sunday, February 18, 2001 :

In Reply to: torqe specks on flathead 6 headbolts posted by HOWARD ROGERS on Sunday, February 18, 2001 :

Start by chasing the bolt holes with a bottoming tap. Then chase and lube the bolts themselves. Start with the center bolt, the one between spark plug holes
3 and 4.(at a low torque of say 40 ft.lbs) Then do the two bolts on either edge of the head on the same row as the first, so you have 3 in a row.
Repeat this process, first towards the front of the engine, then towards the rear. You are starting at the center and working your way to the ends.
Once you've torqued the head to 40#, repeat the process in 10-15# incriments until you reach your final torgue of 65-70 ft.lbs. Note: Before your final
torquing
sequence, you shoud run your engine up to operating temp. and then shut it down. Final torque should be with the engine still warm.
 

Posted by Bill Wincapaw on Sunday, February 18, 2001 at 8:35PM :

In Reply to: Re: torqe specks on flathead 6 headbolts posted by Bill Wincapaw on Sunday, February 18, 2001 at 8:26PM :

OK lets try this

F 17 11 5 2 8 14 20
R
O 16 10 4 1 7 13 19
N
T 18 12 6 3 9 15 21
 

Posted by Cheyenne Dave on Monday, February 19, 2001 at 11:14AM :

In Reply to: Re: torqe specks on flathead 6 headbolts Hmm.. posted by Bill Wincapaw on Sunday, February 18, 2001 at 8:35PM :

Bill;
I guess I killed a lot of electrons saying what you said with a few numbers.
As to the final torque, I took my cue from
several different shop manuals, not the least of which is the B-1 Series shop manual,
and the mechanic who taught me.
Even the guys at VPW can't decide which way is better. To each their own...
 

Posted by Bill Wincapaw on Monday, February 19, 2001 at 5:55PM :

In Reply to: Re: torqe specks on flathead 6 headbolts Hmm.. posted by Cheyenne Dave on Monday, February 19, 2001 at 11:14AM :

Dave
I'm sure torque sequence has more variables then flatheads have headbolts (LOL). As you said to each their own.
Best regards
Bill Wincapaw
 




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