[xj-s] Intake manifold torque specs

XJ-S
1

Well, my ROM is giving me fits so I need some help! What is the
torque and tightening sequence for the intake manifolds?

Thanks in advance.–
1990 XJS Convertible
Dumfries, VA, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–

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2

In reply to a message from Stogee sent Tue 19 Nov 2013:

sorry, 5.3 V12–
The original message included these comments:

Well, my ROM is giving me fits so I need some help! What is the
torque and tightening sequence for the intake manifolds?
Thanks in advance.

–
1990 XJS Convertible
Dumfries, VA, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –

// please trim quoted text to context only

3

What is the
torque and tightening sequence for the intake manifolds?

Finger tight, from center to ends. One grunt, from center to ends.
Two more grunts, from center to ends. Come back after a coupla weeks
of driving, one more grunt from center to ends. Annually thereafter,
one grunt from center to ends.

– Kirbert

// please trim quoted text to context onlyOn 19 Nov 2013 at 10:08, Stogee wrote:

4

In reply to a message from Kirbert sent Tue 19 Nov 2013:

23-27 NM in the sequence described by Kirby.–
The original message included these comments:

What is the
torque and tightening sequence for the intake manifolds?
Finger tight, from center to ends. One grunt, from center to ends.
Two more grunts, from center to ends. Come back after a coupla weeks
of driving, one more grunt from center to ends. Annually thereafter,
one grunt from center to ends.
– Kirbert

–
Jeff Schultz -1992 XJS 5.3L V12 -1995 X300 4.0L
Rutland VT, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –

// please trim quoted text to context only

5

In reply to a message from JagsinVT sent Tue 19 Nov 2013:

Thanks to all! Really appreciate the ‘‘grunt’’ assistance!–
1990 XJS Convertible
Dumfries, VA, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –

// please trim quoted text to context only

6

Looking for some ‘higher level technical specificity’ because we all “grunt” differently - how many Nm is a “grunt”?

I’m moving the wiring from deep in The Valley of Death higher up and putting the wiring harness holding straps up under the nuts which secure the intake manifold down.

This Jaguar V12 6.0 L document ( http://www.jaguarclub.sk/service/x300%20-%20v12_service.pdf ) shows the following:

Intake manifold stud … 13 - 17 Nm
Intake manifold to cylinder head … 17 - 23 Nm

Intake Manifold
Top cover mounting stud … 8,5 - 11,5 Nm
Elbow to intake manifold … 8,5 - 11,5 Nm
Intake manifold stud … 8,5 - 11,5 Nm
Throttle housing to intake manifold … 4 - 5 Nm
Throttle stop screw locknut … 4 - 5 Nm

Manifold Ends
Intake manifold connector bracket screw … 7 - 10 Nm
Manifold end connector assembly … 13 - 17 Nm
Vacuum take-off screw … 8,5 - 11,5 Nm

The books and information I have on the V12 5.3 L (which mine is) shows the nuts, but does not show the torque for them. This lack of torque specification is not limited to just those nuts, but other nuts or bolts too.

Would there be any difference on the above torque from the 5.3 L to the 6.0 L?