Crankshaft Main Bearings Cap Bolts - Spitfire Mark IV, GT-6 Mark III and TR-6

The spring washer, Partr Number WL0210, has been deleted from the main bearing cap bolts on current production engines. Deletion of this washer has been required the introduction of a bolt 1/8 of an inch shorter than the previous condition, to avoid bottoming in the cylinder block.

The Part Number of the shorter bolt is HB 1023 and it can be used for all service replacements. Tightening torque figures for the cap bolts are unchanged and are as follows: TR-6 and GT-6 - 55 to 66 lbs. ft. -- Spitfire 50 to 55 lbs. ft.