Re: spark plug gap for 53 Clipper and jack position

Posted by fredkanter On 2017/4/18 7:40:27

"..... but ultimately the jack location is determined by the frame strength . . . in short, put the jack were the frame looks the strongest. Given that cars of this era were supplied with bumper jacks I place the jack stands at the bumper brackets, but close to the frame horns."

The frame horns where the bumper brackets are are the weakest part of the frame and the cross section is the smallest. They do not have to support the engine or weight of the car except the rearmost body mounts. Frames are engineered so that the wheels are intended to support the car so the best way to support a car is nearest to the "axles". In the front that would be either under the A frames or at the center point of the frame between the wheels. In the rear it would be under the rear axle housing or axle tubes or on the frame forward of the rear spring front mount.

Supporting it by the ends of the frame will cause it to sag and bind the doors especially on 2 dr hardtops and convertibles.

When working on the car it should be supported by jack stands only, no portion of the weight should be supported by a hydraulic or other jack.