At Ace cafe today came across something I hadn't heard before, namely I can't use the pulley that comes fitted on the 9As water pump?!?! It was suggested that due to the fact that the 9A had Power Steering theres some kind of viscous bearing involved inside the two pulleys on the water pump, so the pump speed is not related to the load on the P/Steering pump ...the end result being that the water pump is not driven at the rate it should be if the pulley/pump is not altered. remedy being replace with the mk1 water pump and pulley... or...?
Well the PAS waterpulley arrangement is definitely different to non-pas, not sure how though. The fact that I got supplied with the waterpulley with my PAS conversion kit off ebay suggests you need to swap it AFAIK it should all swap over from your old engine no probs, might be worth taking the opportunity to get a new impeller for your pump
i didn't get any pulleys with my engine, so i've used an 8v crank pulley, 8v alt pulley on the 16v alternator and 9A waterpump pulley. I'll look up the part number when i get home if you'd like? but you can use the water pump pulley without the PAS pully connected, if i remember correctly the water pump pulley is driven at a constant rate as it bolts to the center of the viscous pulley that has a constant speed. The outer bit of the viscous pulley drives the PAS at a different rate. I know this works as i ran my old 16v engine without the pas belt for a few months with no overheating problems. Ro
also the MK1 water pump pulley had a different offset so the belt may not allign with the 9A crank and alt pulleys.
ok guys i showed my mechanic my car and he reckons its fine as it is???? bigger pulley on the inside is for power steering, this has a belt on it smaller pulley on the outside is for water pump, no belt on this one...........u can turn it freely by hand like its nothing to do with the power steering pulley but when the engine is running it spins wots turning if it aint connected it and whys it at a different rate? slightly confused here now
George, having looked at mine, its totally different. The twin pulley set up is directly on the driveshaft, ie the extra pulley which powered teh power steering pump. The water pump just has one pulley, so no alteration required. Also, waterpump on 9A, KR, DX etc are all the same part number, fitment etc.... So to a degree that guy was having us on, I'll post pics later on but looks like you have the pulleys in the wrong configeration, so maybe pulleys on wrong shafts? Dave
The 8V mk1 Pulley arrangement: [The two loose pulleys being the cracnkshaft pulleys from the 9A, powering the water pump, and the outer smaller pulley the power steering. They can't be mounted wrong as 4 bolts, 3 on the water pump.] 9A pulley arrangement: [Again the crankshaft pulleys are loose but mount where the socket is. The waterpump pulley is identical in positioning (slightly diffenrent in form, but then its 10 years later).] George, what the monkeys do you have on yours?
Right, On the earlier 16v's the setup is like this: Belt closest to the block travels round the crank, water pump and alternator. The water pump pulley on this belt is the slipper pulley, the water pump is not driven by this belt. The belt furthest from the block travels round the crank, water pump and PAS pump. This one drives the water pump. If you take this belt off you will be relying on the fact that your slipper pulley is probably old and partly siezed to turn the water pump - not clever. Later 16v's changed this slightly: The belt closest to the block travels round the crank/water pump/alternator as before, but this time it does drive the water pump. The belt furthest from the engine only travels round the crank and PAS pump. You can easily spot the difference becasue the later setups only have a single belt running around the water pump. If your donor had the later setup you can just remove the PAS belt pulley from the crank and be done. If you have the earlier belt arrangement you need to get hold of a pulley from a non-PAS 16v. Manic, yours is the later setup, so you can just whip off the smaller pulley from the crank
I had thought mine would be fine having looked at it, more importantly perhaps, this confirms Georges problem. Cheers Martyn, Dave
