Aircon/ viscous coupling pully

Sam B

New Member
This concerns both P5 and P6 but hope P6 NADA owners may know the answer. I have a V8 version of both, the P5B had aircon as per P6B, except for the evaporator, which is Frigiking, installed before delivery to the customer (I have all the original paperwork). When I bought the car the York compressor had been removed but the three belt pullies retained on the crankshaft and standard P6B water pump installed. The rest of the aircon kit was retained. The engine still had the compressor bracket on it and all the removed kit was in a box. So I am able to reinstate the aircon. However, I notice that the fanbelt pully is much smaller in diameter than that on the standard water pump - is that correct?
IMAG0183-20200813-182259897.jpgIMAG0183-20200813-182259897.jpg
 
Hi, I don't know for sure but it would make sense, air-con puts more load on the cooling system because the condenser is producing heat in front of the main rad. The smaller pulley will make the fan turn faster.

Colin
 
Hi Sam,

Yes, the pulley for the nylon fan is noticeably smaller in diameter when compared to the pulley that runs with the fixed fan.
The nylon fan and viscous coupling were used with Rovers that were fitted with air conditioning, and in countries that were classed as being hot. All of the series 2 P6Bs that were imported into Australia, having been assembled at the British Leyland plant in N.Z came with that cooling arrangement. Air conditioning was a dealer fit, so some Rovers would have it, whilst others did not, but the water pumps, fans and viscous couplings and their smaller pulleys were fitted to all, in addition to fan shrouds to suit.

Ron.
 
Last edited:
Back
Top