Crown Victoria Lower Control Arm Fasteners

Lower Control Arm Fasteners
www.p71interceptor.com

Part Number	To	From	Comments	Suggested Retail
N811745-S426	1979	2002	Lower Control -> Frame Bolt Bolt M14 x 2.0 x 120 Hex HD (Supercedes N800970-S100)	$10.84
N808943-S436	1979	2002	Lower Control Arm -> Frame Nut "Flag Nut" M14 x 2.0 Hex with Nylon Insert (Supercedes N808943-S428)	$16.62
391598-S60	1979	2002	Shock Absorber -> Lower Control Arm Bolt 5/16" x 1.375 - 18 Hex Flange (Self Tapping) (Supercedes 38472-S2 and 3915980-S60)	$5.80

Notes:

The lower control arm bolts are located close to the ground and subject to a large quantity of "road splash"
If you live in an area where chloride salts are used to clear the roads of salt and ice during the winter, then it is unlikely that you will be able to get your old lower control arm bolts out without damaging them. The bolts are coated in corrosion inhibitors during manufacture. But the bolts are subject to tremendous stress when the vehicle is driven which will render the coating ineffective rather quickly.
The inner sleeves of the bushings also corrode inwards further locking it together with the bolt which is expanding outwards as it corrodes
A large 24 inch breaker bar with a strong impact socket on it will likely turn the control bolts, but then again it likely will not accomplish too much because the inner sleeve of the bushing will break free of the rubber and spin freely. Cutting away part of the bushing with a dremel can work, as can cutting off the control arm with an angle grinder.
Many shops will use a torch to heat up the inner sleeve of the control arm bushing red hot and then pound the bolts out with a hammer and chisel. This may embrittle the control arm mount metal on the frame though.
A relatively low temperature propane torch can be used to burn away the rubber and then the inner sleeve held using a pair of visegrip pliers.
The nuts which attach to the control arm bolts contain a nylon insert that prevents the nuts from loosening as the vehicle is driven. These are one use fasteners and should always be replaced with new service assemblies after they are removed. And if a torch has been used, the nylon inserts may melt from the heat generated by the flame of a torch.
Spraying penatrant oil on the control arm bolts and nuts a few days before attempting to remove the control bolts may assist in removal of the fasteners. But do be warned that penetrant oil is flamable and may ignite if a torch is later used.