Just bought a NOS water pump and the pulley shaft for the viscious fan clutch is just a bit too small. So I have to swap over the old pulley shaft to the new pump. Anyone know how to best remove the pulleys from the pump? Does that big nut unscrew and it's press fit on?


Thanks, Bill

 

The Repair Operation Manual states " Use suitable extractor and draw pulley from water pump". Sorta means nothing to me. Do I have to take the nut off first? Or something else?


HELP!

 

Memory,

That big HEX is a cast part of the pulley, NOT a nut, thus enabling you to hold that pulley whilst tightening, or undoing, the centre bolt of the clutch assembly.

I have never tried to remove that pulley, but a specific puller, or press with GOOD placed pates, to press the shaft out of the pulley will be the only way.

What part is too small, the pulley itself, or something else??

 

The shaft is both too short and too skinny.

 

Sounds kike a S3 pump.

Lots of vague info about the differences now that stocks are running low, as are the people rebuilding them.

I had a chart somewhere, and looked prior to typing, but cannot find it, but I will keep looking as time permits.

 

Well, my ideal situation at this point would be to swap over pulleys from one pump to the other. But I'm afraid that I or a machine shop would bugger up the pulley. Guesss I'll keep an eye out for either a matching SII pump or a fan clutch that will fit this other pump (whatever it is). It is marked C45161/R on the box which shows in the parts manual as for a 4.2 8L.25469 and greater and my engine is 8L.40403


But who knows what some PO did in parts swapping.

 

Of course, my other option is to eliminate the viscious clutch and fan altogether and install a couple of electric fans. If I'm going to do it, now is the time.

 

That would be my voter. E fans are great. My lump thrives on it's pair.


And, Is there not a great risk that the shaft from the old pump will not fit the new pump?


You are very fortunate in getting a NOS pump! Messing with it seems highly risky. End up with a bad old unit and a screwed up new unit!!!


Carl

 

Yes, I agree, one wouldn't know until pulleys are off if there are swappable. Not my most favorite option. I just didn't want to make too many changes to the cooling system at once. I've already changed out the stock radiator with an aluminum one. And I'm going with an after market A/C condenser. E fans only is another BIG step. Do I install inside the shroud as a puller fan; outside as pusher fans; will my stock Lucas alternator support that current draw; will my battery support it? I would hate to do all that work and find out it doesn't keep the engine cool.

 

Another *possible* option would be a later Series III pump, clutch, and fan. The type that uses the 4-bolt clutch.

Haven't researched the viability, though. There might be snags.

Alternators and e-fans: Series 1-2-3 XJ6s typically had alternators that were barely adequate to begin with in terms of amperage.

Cheers
DD

 

My wife and I have a joke - "It all started with a throw pillow". It's the same with my XJ6C

 

Well, toss that pillow again!!!


Johnscars markets a bracket to install a popular AC Delco alternator with lots of amp capacity. A bit pricey. And add the Efan package and it isn't cheap. But, so efficient.


The fan/fans go best as "pullers" in a a shroud behind the radiator.


Source from the wrecking yard or after market. Just make some measurements as to the space in your car and compare to what seems similar.


But, on balance, just get a pump that fits. Check out Doug's idea.
The short way home!!!! Not always the way I go, though!!!


Son calls it making a job in to a project!!! He won't admit to doing the same!!!! A very talented guy that goes into many fields...


Carl