Rolls Royce Restoration
In 1996 Rolls Royce generously arranged for two apprentices to carry out a complete overhaul of the Panhard. The car had been a static display in the Bridewell Museum since Hubert Egerton had donated it in1936 and no significant work had been carried out during that period.
The car was completely stripped with each individual component being cleaned and examined for serviceability and wear and tear.
Engine
- Engine cylinders immersed in hydrochloric acid to remove rust from water passages
- New valves (inlet and exhaust) made from Rolls Royce metal KE 975 with clearance of 0.003” as no valve guides in head
- Barrels and pistons in reasonable condition
- One and three con-rods required repair as both cracked
- All four con-rods straightened
- Small ends jig bored and new gudgeon pins made for assembly with pistons
- The big ends were checked for distortion with the bearing housings requiring some adjustment
- The crankshaft whilst straight was very worn and the bearings were misshapen.
- The crankshaft was re-ground and new bearings were made out of phosphor bronze
- Camshaft halves checked for bow and straightened then bearings reground
- Camshaft pedestals re-bushed
- Rocker arms reamed out and re-bushed
- Governor assembly overhauled with new pins and bushes fitted
- New thread fitted on end of camshaft
- Timing gears badly worn but unable to replace
- The magneto ignition, manufactured by BT-H and taken from a 1928 Austin, was kept as the cylinder heads had been drilled and tapped for 18mm spark plugs
- An additional “Du Plex” gear fitted to the rear of the camshaft for the magneto
- With the engine reassembly completed it was tested on a rig and found to be satisfactory
- Exhaust valves were found to be stiff and the stems had slight score marks as well as being clogged with oil
- Valve stems reduced by 0.002”