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post #1 of 9 (permalink) Old 05-07-02, 11:43 PM Thread Starter
Battens PerformanceTuning
 
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Bolt down and torque settings for EB 4.0 head

Does anyone know off hand what the torque settings are in stages for the EB4.0 head.
Have not got my bible with me.
Thanks.
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post #2 of 9 (permalink) Old 05-08-02, 01:27 AM
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cylinder head bolts
step 1 : 40 Nm
step 2 : Rotate 90 Degrees in Tightening Direction

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post #3 of 9 (permalink) Old 05-08-02, 05:00 AM Thread Starter
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Thanks for that.

check out www.norcom.net.au/~bpt
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post #4 of 9 (permalink) Old 05-09-02, 04:47 AM
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Make sure that you use new head bolts or you may be doing the job again sooner that you think.

Herrod Motorsport

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post #5 of 9 (permalink) Old 05-09-02, 08:24 PM
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Don't forget the tightening sequence. Start on the center 2 bolts and work out from the middle.

When cubes aren't enough.
Blow NOS!!!
12.3s @ 110mph so far
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post #6 of 9 (permalink) Old 05-10-02, 12:34 AM
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I have abandoned the factory method for torquing down the head. The 'rotate it through 90 degs' method leaves you with different tourque settings on each both, no matter how careful you are about it.

We do it in the same order, but go through several stages up to about 120Nm.
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post #7 of 9 (permalink) Old 03-22-08, 07:53 PM
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Re: Bolt down and torque settings for EB 4.0 head

need toque settings for cam carrier on an eb ford
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post #8 of 9 (permalink) Old 03-23-08, 11:41 PM
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Re: Bolt down and torque settings for EB 4.0 head

Quote:
I have abandoned the factory method for torquing down the head. The 'rotate it through 90 degs' method leaves you with different tourque settings on each both, no matter how careful you are about it.
Can you prove that? I suspect more likely:

a) You have been using heat softened heads and experienced head flutter as the head bolts embed themselves in the top of the soft head at either end of the softened head;
b) You have used a cheap torque wrench or one that has been dropped and is out of specs;
c) you haven't been following the correct technique in tightening the head bolts; and/or
d) you have been reusing the torque to yield head bolts,.

I suggest you have a read of the info here: Tech Tips
and here Tips on Tightening Cylinder Head Bolts and Bolt Tech Tips

In any event the technique you suggest risks snapping a head bolt.

Regards Blue
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post #9 of 9 (permalink) Old 03-24-08, 06:41 AM
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Re: Bolt down and torque settings for EB 4.0 head

PS on reflection my last post to this thread may appear a bit inflammatory. It wasn't meant to be and I would seriously be interested in any evidence that 120nm approach is superior as it flies in the face of conventional engineering wisdom and the material published by ACL, Ford, Austral, ARP etc Nonetheless, it doesn't mean someone hasn't found a better way.

Regards Blue
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