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”

The engine after re-installation

Brakes and Gears


  • The gear selector and handbrake lever were not too worn. A bush was needed in the bottom bearing. The teeth on the handbrake ratchet were re-cut by filing and the ratchet release mechanism was re-pinned to remove slack
  • New bearings were made for the gearbox shafts. The teeth on the gears were only slightly worn and only needed cleaning with a stone
  • The rear wheel brakes were re-lined with ash blocks and the linkages repaired

The bandbrake and ash blocks  

Steering wheel and box


  • A quarter of the metal frame to the steering wheel had to be replaced using aluminium plate
  • The wooden rims were glued together, filled, flattened down, sprayed with cellulose lacquer and polished
  • The steering box gear teeth were extremely worn but could not be replaced. Improvements made by skimming the shafts of the drop arm and pressing bushes into the box to remove play

The steering gearbox as it is today, internal and external view

Water pump, fuel tanks and oilers


  • The water pump bearings were worn, the main housing was bored out and bushes pressed into position. 
  • Special water pump grease applied before reassembly

The original water pump


  • The petrol tank was sound but the tap was leaking.  This was replaced with a three position tap to allow easier  draining of the tank
  • The paraffin tank for the hot-tube ignition burners which is in the rear squab of the front seat was in perfect condition
  • The hand oilers were in good condition, the automatic oiler which was worn was refurbished and all the pipes to the engine were replaced

Chassis 


  • The chassis was stripped down, the four main members were in good condition and were resealed with Shellac
  • The metal subframe which carries the engine and gear box was cleaned of rust
  • The front axle was de-greased and wire brushed
  • The suspension was extremely worn. All the shackle pins were replaced and the connecting plates between the  springs and the chassis were filled in with weld and reamed out to size again

A suspension shackle pin

  • The track rod pins and bushes were in better condition and were repaired by reaming out the holes, and fitting  oversized pins
  • The fit of the king pin bearings and wheel bearings showed signs of wear but were adjusted with new bushes

The right-hand side kingpin

  • The rear suspension and rear wheel bearings were given the same treatment 

Body

Car body prepared for re-painting


  • All body panels stripped of paint,  sanded, primed and given three coats of paint before the car was sent to a coach painter to be lined on the body and wheels
  • The metal wings and bonnet were wire brushed before priming and painting
  • The wheels were in perfect condition but new tyres were supplied and fitted by Dunlop free of charge
  • The bulkhead was cracked in two at the base so was replaced 
  • Brass foil-plating on the grab handles, gear levers was re-done as worn and peeling
  • Upholstery re-stained to bring back colour and carpets made for front and rear floors
  • The lamps were stripped, sandblasted, re-assembled, resprayed black, nickel plated on rims and reflectors and polished


The completed car

Article about the renovation which appeared in the Eastern Daily Press

Page updated

Copyright Team Panhard