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mike

Torque figures for ball joint mounting bolts

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I checked my factory shop manual carefully and couldn't find a figure for the M8 bolts.  Odd since every other fastener in the entire front axle assembly has a torque figure, and there's an entire page devoted to drilling out the factory rivets to replace a ball joint, and then using bolts to hold the new one in place.

 

TIA

mike

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The torque specification spreadsheet in the Technical Articles has it as 25 +8 NM as “Track rod arm (Pitman arm) at kingpin (strut housing)”. 

 

The names in that spreadsheet are a bit abstract so I would be interested in confirmation. 

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4 hours ago, Simeon said:

Track rod arm (Pitman arm) at kingpin (strut housing)”.

I saw that but thought that meant the three "special bolts" (the ones with the safety wire holes in 'em) that hold those two parts together, not the 3 bolts that hold the ball joint to the lower control arm...or am I mistaken?  The terms used in the shop manual confuse me too!  And I'm too used to ft/lbs to conceptualize newton/meters.  

 

mike

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Does this help?  
 

Metric Bolt Torque Table
Estimated with clamp load as 75% of proof load
as specified in ISO 898-1
Property
Class
8.8
       8.8       
10.9
       10.9       
 12.9 Socket Head 
Cap Screw
12.9
 Minimum Tensile 
Strength MPa
M6 - M16:  800
M20 - M30:  830
1040 1220
Nominal Size
and
Thread Pitch
Bolt Torque Specs in Foot Pounds or (Inch Pounds)
Dry Lubed Dry Lubed Dry Lubed
             
M8 x 1.25 (225) (169) (333) (242) (377) (284)

 

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