XJS ( X27 ) 1975 - 1996 3.6 4.0 5.3 6.0

cilinder head torque '86 5.3 XJS V12 HE

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Old 02-26-2013, 08:34 AM
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Default cilinder head torque '86 5.3 XJS V12 HE

I al looking for the cilinder head torque setup, I have new gaskets but do not know what the force is to tighten the bolds.....
 
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Old 02-28-2013, 08:46 AM
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Hard to get info?
 
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Old 02-28-2013, 09:04 AM
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Originally Posted by mopar
Hard to get info?
According to my Haynes manual the 7/16ths cylinder head nuts are tightened in three stages:

Stage 1 = 25 Lbf/ft
Stage 2 = 40 Lbf/ft
Stage 3 = 52 Lbf/ft

The 3/8 nuts are tightened at stage 2 and three as follows:
Stage 2 = 20 Lbf/ft
Stage 3 = 28 Lbf/ft

These are for the pre HE engine, and the manual does not quote any different figures for the HE engine, which has a higher CR. Worth checking though as it is an HE you are working on.
 
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Old 03-04-2013, 06:58 PM
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Default Torque

This is from my AllDataDIY manual. The conversion to LBS is at the site listed at the bottom. Also, I attached a pic of the sequence from the manual. This is for the '85 HE


TORQUE FIGURES
Air pump adjuster bolt/locknut 2O - 27 Nm
Banjo connector bolts 12 - 14 Nm
Camshaft sprocket to camshaft 23 - 27 Nm
Camshaft cover 11 Nm
Connecting rod cap nuts 54 - 55.5 Nm

Cylinder head to block (9/16"AF) 36 Nm
Cylinder head to block (11/16 "AF) 70 Nm


Elbow to inlet manifold 12.2 Nm
Engine mounting bracket to crossmember 19 - 24 Nm
Engine mounting tie bolts 34 - 40 Nm
Exhaust down pipe to manifold 30 - 35 Nm
Fan/torquatrol to water pump 23 - 27 Nm
Flywheel bolts 90 Nm
Fuel pipe unions (5/16" dia.) 8.5 - 9.5 Nm
Fuel pipe unions (3/8" dia.) 11 - 13.5 Nm
Fuel pipe unions (1/2" dia.) 27 - 33 Nm
Heat shield to manifold 23 - 27 Nm
Hose clips 2.5 Nm
Inlet manifold to cylinder head (nuts) 23 - 27 Nm
Inlet manifold to cylinder head (bolts) 23 - 27 Nm
Main bearing cap nuts (1/2") 84 Nm
Main bearing cap nuts (3/8") 36.5 - 38 Nm
Oil cooler pipes 54 - 50 Nm
PAS pump to mounting bracket 50 Nm
Propeller shaft bolts 36.5 - 43 Nm
Rear engine mounting peg 34 - 4O Nm
Rear engine mounting rubbers 36 - 43 Nm
Rear engine mounting to body (5/16 bolt) 19 - 24 Nm
Rear engine mounting to body (3/8 bolt) 36 - 43 Nm
Sandwich plate to block 16.5 - 21 Nm
Silencer to compressor union 34 Nm
Sump drain plug 15 - 18 Nm
Sump set screws 16 - 20 Nm
Torque converter bolts 55 - 62 Nm
Thermostat housing to cylinder head 23 - 27 Nm

Converting Nm to LBS:
Torque Conversion
 
Attached Thumbnails cilinder head torque '86 5.3 XJS V12 HE-torquespecs.jpg  
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Old 03-05-2013, 04:36 AM
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Thanks for the info, now I can do the work correct, hope te solve te oil leak with the new seals and gaskets.
 
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