Raw Water Pump Removal @#$&%?!!!

[pmikler]

I scoured the internet for a solution to get this darn thing removed. The only thing I found was comments on how much of a pain in the *** it is. So I post this for any unhappy traveler that does a similar search and can learn from my mistakes and my final solution....which may be imperfect.

A couple of things.

• This may have not be so much of an issue on a direct drive but in the case of a v drive access and leverage points are limited.
• The pump is cast steel the pully is aluminum and the interface between the 2 should be measured in sub millimeters or angstroms
  • galvanic reaction and rust play a part here
• If corroded I am of the opinion that leveraging it is an impossibility because its such a tight fit
  • Plus your leverage point is a balanced aluminum crank pully and I worried about deforming it
• What I tried
  • With out any obvious solutions I did pry on the pump enough that it pulled out the the pressed in shaft. the base did not budge
  • I tried tapping it back and forth and actually got it to move a bit but not out.
  • I tried wd-40 and other penetrating lubricants
  • I tried heat.... which is not referable in a tight space and somewhat dangerous as you are laying on the motor to gain access
  • With the shaft out it gave me an option with a puller I drilled 2 holes in the base so I could hook the puller arms in and torque away.... it just bent the hell out of the arms and did not budge.
• What worked
  • I eventually drilled 2 more holes threaded all 4 and then going back and forth slowly tightened the bolts until it popped out. and it came out fighting
  • when and if my pump gets welded on and penetrating oil and careful leverage don't work will just jump to the following
    • Cut the shaft
    • Drill and tap 4 holes and methodically tighten the bolts against the crank pully (I am glad I went with 4... the the base is cast and not hardened steel and I was worried about stripping the threads. Which I think it would have done- at least as stuck as mine was.
    • This can all be done with out removing the muffler and there is enough access to drill tap, etc...

Lastly I am sorry you are going through this.

[RDahler]

I would have given it the old school method first loosen the bolts and run the engine a little. The pulses from engine running will sometimes free them up. This is how we would loosen stuck tractor rims loosen the lug’s and drive them around a little.
just my $.02 glade to see you got it off.