Vehicle & Technical > Range Rover

Swapping 4.2 for my tired 3.9-Any Info

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kjj0506:
So pardon me for being a chimp but the blonde hair mom gave me makes me a little ... um ...

So are you saying the A/C will work and I can use the Serp Belt set up that the motor came with but will have to figure out the PAS pump ( keep the 90 version and attach to the 95 motor?

I have a Zirgo Electric fan and Adjustable temp switch so the fan is handled.

Range Rover Blues:
Well I had my 2 LSEs nose to nose the other day (one is the donor for Blue, the other is my 'best' car) and noticed the Air conn pump sits in exactly the same place, though the bracket is different as the serpentine one also holds the alternator.

Then it struck me.  The reason I think that the PAS pump is different is the belt mounting, I think it rotates the same way but the serpentine pulley is wider.  
So given that the air conn pump has the clutch in the pulley I'd guess that it too would have to be swapped but as Blue won't have air-conn it's not a proplem for me.

The water pump does rotate backwards though, but it's completely different anyway.

So it all depends on what you get with the engine I guess.  Late hard dash SE/LSE had a 100 amp alternator driven direct from the crank pulley via a narrow multi vee (serpentine style) belt although they still had the 4-belt set-up.  This would allow the bigger alternator without swapping all the front end of the engine, so it's an option I'm considering as it's what is on the engine in the donor already, though I want to convert it to serpentine but that means the front casing (timing case) and water pump, alternator, serpentine belt idler, PAS pump etc etc.  Some of which I have on a scrap Disco engine, the non-air conn idler is different though, the air conn one is the same as a 300TDi idler.

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