Bentley Flying Spur cooling-coil leak, stuck flap motors and parts-cost choices

Sifu White explains what happened

Prices, repair times and warranty terms mentioned in the video applied at the time. Ask the workshop about current arrangements.

Today we are repairing a Bentley Flying Spur. The customer says the refrigerant has been refilled several times. We first inspect the condenser, which requires front-bumper removal, but find no leak there. We therefore suspect the cooling coil inside the car.

After removing and inspecting the cooling coil, we confirm a leak; the lower section is corroded and leaking. The customer also complains that outside air, smoke or rubbish odours sometimes enter the cabin. The flap motors controlling outside air can stick or jam, so faulty motors also need replacement.

We choose original parts for the flap motors and have placed an order. The cooling coil can be OEM or original. The video mentions a price close to RM12,000 for the original component alone, so we recommend a suitable OEM cooling coil together with the expansion valve. This Bentley job is expected to take less than five days because it cannot be rushed.

We must focus on quality and reinstall every component slowly and carefully.

Why cooling after a regas does not prove a repair

Refrigerant circulates through a closed circuit; it is not fuel that the engine consumes. If cooling returns after charging and then deteriorates, the investigation should establish whether there is a leak, whether the previous charge matched the specification, and whether another control or heat-rejection problem is present. The initial return of cold air describes performance at that moment. It does not show that a leaking component has been repaired.

A model’s familiar failure pattern is a starting point, not proof. The condenser, connections, hoses, compressor seals and evaporator inside the cabin are different possible inspection locations. An oil stain can guide a leak test, but it is not a substitute for confirmation. Finding one leak also does not clear every other part of the circuit. After repair, the sealing and cooling performance need to be checked again under conditions relevant to the original complaint.

Why a working refrigerant circuit can still deliver warm air

After the refrigerant circuit cools the air, doors, ducts and temperature controls still have to direct it correctly. Depending on the vehicle, temperature regulation may involve mixing warm and cool air or controlling the heater circuit. One warm side, a hot rear outlet or a change at one particular setting calls for checks of air distribution and heater control as well as the refrigerant side.

A motorised door can stick at a particular position, and a mechanical linkage can become detached. A fault limited to one setting can be missed if testing uses only the default settings. The absence of a code also does not rule out mechanical sticking. Save the temperature, zone and airflow-mode settings that trigger the problem so the technician can reproduce it and compare commanded movement with what actually happens.

What to tell the workshop about your own car

You do not need to guess a part name first. A clear description of what actually happens is often more useful for reproducing the complaint than requesting a particular replacement.

• Record the last regas date and how long cooling lasted.
• Note the affected side or row, temperature setting and airflow mode.
• Include the model, year, recent repairs and what changed before or after the symptom began.