S1 Continental Chassis Info

S-TYPE CONTINENTAL

The chassis number for these models is composed of two initial fixed letters BC where the C stands for Continental, followed by a number from 1 to 101. Finally two letters, the first of which determines the series of the model.

Left hand drive models have an L preceding the last two letters.

The chassis number can be found on a plate attached to the engine compartment bulkhead.

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Release Date	Chassis Number	Modification Detail	introduced at Chassis:
Mar 1955 - Feb 1956	BC1AF to EC101AF	Spreading the load of the fulcrum bracket bolt over a larger area to compensate for distortion of the lugs on the front pan, modified butterfly valve and countersunk screws, SU carburetter	BC11AF
		Modified bosses to increase strength of rear axle tube	BC12AF
		Setscrews in place of studs for main bearing caps, improved water and oil mist sealing on servo	BC16AF
		Steering ball joint castle nuts with increased bearing surface	BC19AF
		Increased friction on brake shakeback stop and increased load on servo return spring	BC21AF
		Brake wheel cylinder material changed from aluminium to cast iron, stronger clamps for rear anti-roll bar	BC69AF
		Filter in brake fluid supply tank	BC70AF
		Revised type of rear engine mounting	BC79AF
		Provision of drag links with greater resistance to kinking under compression	BC81AF
		Introduction of aluminium brake master cylinder	BC88AF
		Increased diameter rear engine mounting bolts and modified bracket, strengthened spring support plates. front suspension	BC96AF
Feb 1956 - Jan 1957	BC1BG to BC101BG	Increased number of fixing holes in rear axle tube	BC1BG
		Steering lever with taper roller bearings in place of bushes	BC2BG
		Strengthened front suspension fulcrum bracket	BC3BG
		Modified shakeback stop front and rear brake assemblies	BC6BG
		Dual brake master cylinders	BC16BG
		Modified dynamo and regulator, 8:1 compression ratio cylinder head with larger inlet valve	BC21BG
		Modified sealing ring on centre steering operating lever (P A S )	BC23BG
		Welded stiffeners on each side of jacking bracket	BC27BG
		Introduction of copper petrol pipes, uphill run popes from twin master cylinders to supply tank, reach nut and washer to suit spot facing of ball joint and trunnion body, output shaft to propeller shaft	BC28BG
		Radiator and drain tap suitable for modified frame	BC30BG
		Increased number of fixing holes in rear axle centre casing	BC62BG
		Reversal of power cylinder mounting bolt (P.A.S.)	BC70BG
		Introduction of oil deflector plate for rear shock damper	BC92BG
		Voltage regulator with swamp resistance	BC96BG
Jan 1957 - Jul 1957	BC1CH to BC51CH	Strengthened front shock damper body (introduction of sleeve in mounting bolt bore)	BC1CH
		Stronger front shock damper casing	BC7CH
		Combined inertia and starter ring. modified starter drive and stiffened clutch casing	BC31CH
		Stronger fulcrum pin, axle yoke	BC41CH
Jul 1957 - Jan 1958	BC1DJ to BC51DJ	Improved propeller shaft seal	BC1DJ
		Modified stub axle yoke seal	BC8DJ
		Modified rear axle shaft flange	BC10DJ
		Stronger drag link	BC36DJ
		Introduction of ‘Roto’ finished pulleys	BC42DJ
		Introduction of strengthened adjusting sleeve steering cam	BC44DJ
		Introduction of shock dampers with Increased size end cover studs	BC47DJ
Oct 1957 - Jun 1958	BC1EL to BC51EL	DR 3 windscreen wiper motor	BC1EL
		Stronger rear shock damper link bushes	BC3EL
Jun 1958 - Jan 1959	BC1FM to BC51FM	Deletion of lubrication pipe on idler lever, modified rear silencer mounting to prevent burning mounting rubber, improved type rear brake expander wedges, final type modified stub axles, twin jet centrallly mounted windscreen washer	BC1FM
		Grease lubricated track rods, large diameter axle shaft splines, grease lubrication of centre steering, intermediate heater and demister controls, wire type clips on propeller shaft grease seals	BC1FM
		Extended outer bearing blocks for lower triangle lever, increased capacity boot type refrigeration, increased side clearance on rear brake wedge expanders to prevent sticking	BC1FM
		Replacement of .250" dia. wing and valance plate bolts and screws with .3125" dia., modified run of handbrake cable	BC1FM
		Enlarged shakeback stop slot in brake shoe web	BC11FM
		Strengthened front hubs	BC14FM
		Plain washer at each end of pivot distance piece on braking system direct and intermediate linkage	BC31FM
		Deletion of check valve in brake fluid supply pipes	BC44FM
Dec 1958 - Apr 1959	BC1GN to BC31GN	Simplified starter relay mounting	BC1GN
		Thermal conductor type water temperature gauge	BC9GN
		Seal between bearing housing bodv and front shock damper	BC16GN
		Extended neck on propeller shaft seal	BC25GN
		Modified form of front brake shoe link	BC28GN
		Introduction of purolator air filter on cars with interior cooling	BC30GN