TR4/4A TR4 Water Pump and Pulley

[KVH]

What's the best way to take the pulley off the water pump when installing a new one? Do you recommend a new pulley or new woodruff keys?

How do you avoid the impeller spinning while you try to loosen the front nut?

 

[sp53]

Yes those pulleys can really get stuck. It sounds like you have the pump assembly off and if not you can usually just push down on the belt to hold everything while you loosen the nut. You can also use an air wrench and just give it a quick blast to loosen the nut because you do not want to strip the center stud by running the nut off to fast. Once you get the nut off clean the area up good and squirt some super stuff down on the key way from the front. If it is stuck on real bad, you are going to have to use a puller and a spacer to take up the distance of the stud and just take your time. In addition you might try some tapping with a hammer, but not hard enough to damage or scar the pulley. Just hit it hard enough to get a harmonic vibration. Sometimes you have to purchase a new pump and pulley. If that is the case, I would probably buy them from that guy in Idaho.
Steve

 

[NickMorgan]

If the pump is off the car you can use an old fan belt wrapped around teh pulley and then gripped in a vice to hold the pulley while you undo the nut. Hitting your wrench with a hammer usually gets it going.

 

[Geo Hahn]

What's the best way to take the pulley off the water pump when installing a new one? Do you recommend a new pulley or new woodruff keys?

I made a pulley puller just for that (angle iron & bolts)...

Works with pump on or off the engine. Even if the pulley isn't real tight this keeps you form ramming the radiator (or your fingers) when it finally breaks loose.

Let me know if you want to borrow it. I can bring it along to any of this weekend's events if you'll be around.

Geo

<span style="font-style: italic">Okay -- that didn't work. Either I've lost it or something has changed with the button to embed an image. Here's a link:

https://www.cybertrails.com/~ahwahnee/waterpump.JPG</span>