Fuel Cooling Hot Start Problems on the Jaguar V12
Jaguar V12 and XJ12 Engine Hot Start Problems Why you need your AC working all the time The aircon cooling system has two purposes on the 5.3 litre V12 engine: To cool and dehumidify the cabin To cool the fuel Fuel cooling The V12 engine bay runs rather hot, and can reach 120degC when the [...]
7 Tips for Preventing Fuel System Failures
7 Tips for Preventing Fuel System Failures As one of the UK’s leading restorers of luxury classic cars, we come across all sorts of common problems that require the attention of our specialist engineers. At KWE our aim has always been to ensure our customers receive a ‘better than new’ restoration service for their Jaguar [...]
Why You Should Never Use Coolant Sealants
Why You Should Never Use Coolant Sealants You have a slow coolant leak – a few drips on the drive, occasional overheating, heater running cold. Solution – add a sealant such as Radweld, K-Seal or Barr’s leaks. WRONG! These materials will more or less permanently damage the engine, radiator and heater matrix. We have had several cases [...]
Coolant and Fuel Hoses
Coolant and Fuel Hoses - pitfalls and solutionsCoolant hoses There are several vendors who offer ‘Kevlar reinforced’ replacement coolant hoses. In our experience these are of poor quality, and far from offering long life are in fact much shorter-lived than the original manufacturer’s hose. We experimented with these from a well-known Jaguar parts specialist in [...]
Waterless Coolants – Our view
Waterless Coolants – Our view We are often asked by clients whether they (or we) should use a waterless coolant. There is one supplier who appears frequently in classic car circles and who makes claims for its benefits including cooler running, lower coolant pressure, no corrosion due to no oxygen and indeed more power. Some [...]
V12 Cruise Control Bellows
V12 Cruise Control BellowsThis note is about the rather unreliable bellows actuator on the pre-1991 V12.The Cruise Control (Jaguar used to call it Speed Control) system incorporates a vacuum bellows to control the engine speed via a mechnical cable to the throttle pedal. The actuator comprises a rubber bellows, an expansion spring and two steel [...]
