L6 4.2 liter (258) jeep 7/16 thread bolts 7 long 4.5 uhl 7 short 3.750 arp bolts
arp cylinder head washers please check thread sizes before ordering these do not have studs on top that may be needed for valve cover / accessory's for example casting numbers 89330000 we have found that in some cases model 4.2 may use the 1/2 thread bolts
torque is 70 foot pounds done in three steps 30 55 then 70 ft pounds with arp lube included in kit. Cylinder head washer goes inner chamfer side up
ARP High Performance Series bolts are cold forged to ensure molecular integrity, heat
treated prior to thread rolling and machining and nominally rated at 180,000 psi tensile
strength. Optimum design, enhanced reliability and increased strength are the main attributes
of ARP’s High Performance Series fasteners.
# 146-3603
more 258 head bolts