Coolant Pump Pulley Off...

[KPW]

Belt jumped while out on a spirited drive last weekend, didn't think much of it as I had just rebuilt the tensioner, and I was lucky enough to only be about a mile away from home, so I limped home and ordered a new belt. Go to put it on this weekend and see that the pulley is pulled forward, so the alignment is whacky. Belt was behind the pulley, must have helped to "floss" it off.

Tried to tap it back on, ended up tapping it the rest of the way off. Oops...

So I've got the car apart to the point where I've been trying to get the pulley bearing (?) back on, now that I was able to separate it from the pulley itself by removing the four 8mm bolts. With it being so tight in the engine compartment, I'm reduced to pry bars to try and apply force the way I'd like to. Not having much luck.

Does anyone have any ideas on how to get this back together? Or, at this point, is it a water pump replace? I'm working in in a carport, so this should be fun.

[A26B]

The Water Pump mounting flange, shaft & bearing are a single unit that has the pump impeller mounted on the inside of the pump. If you have in your hand, the flange attached to the pulley by 4 bolts, you have a broken water pump shaft. You need another water pump or send your pump to Marc Haibeck for rebuild.

[KPW]

Thanks Jerry, I most definitely have that flange in my hand.

Looking at my options for replacement, is there any reason I should avoid, something like the Gates pump from Rockauto since it's about half the cost of the rebuild or the new unit you carry?

I'm happy to pay more (especially "in network" ) if it's the recommended option, but I'm interested in knowing all the details before jumping in.

[Dynomite]

Originally Posted by A26B

The Water Pump mounting flange, shaft & bearing are a single unit that has the pump impeller mounted on the inside of the pump. If you have in your hand, the flange attached to the pulley by 4 bolts, you have a broken water pump shaft. You need another water pump or send your pump to Marc Haibeck for rebuild.

I doubt the shaft is broken....What most likely happened is the water pump impeller is spinning on the shaft. This happened to me on a new water pump......the impeller spun on the shaft. A bit difficult to diagnose unless it becomes more obvious by the water pump pulley falling off

On the other hand....it kind of sounds like the flange spun off the shaft.....but same predicament.......you need rebuilt or new water pump.

I would bite the bullet and have Jerry send you out a new water pump as you will have that in your hands in two days. But as you like there are others that may have experience with the Gates Pump you found at Rock Auto. Or....if you have some time......send your core with spun impeller or spun flange off to Marc Haibeck for Rebuild. Include the shaft and flange or flange. I think Jerry's Water Pump comes with new gasket (do not forget the gasket).

Or....if you want to try cheap ZR1 Water Pump on Ebay

[KPW]

Good talk guys. Poked around a bit and decided I want to do this job once.

Just placed my order with Jerry, and plan to hang on to my old unit for Marc's rebuild just in case *knock on wood*

[KPW]

I have my new Coolant Pump installed on the car. I've been busy with other things so getting it all back together is taking some time.

All this time has given me plenty of time to think (and worry). Since I drove it home with no coolant flow for about a mile or two, what are the chances I crushed the Head Gaskets?

Hoping I was lucky here, but is there anything I should check before I get it back together completely?

[A26B]

You could check head gasket integrity for coolant leaks is to pressure test the cooling system. Simple matter to remove pressure cap & replace with tester. Will need to button up the cooling system first.



http://www.oreillyauto.com/site/c/de...3002&ppt=C0331

[KPW]

Thanks! Should I fill with coolant as well, or just get everything attached?

[We Gone]

I've had two new NOS water pumps that the pulley came off the shaft within 100 miles. Had Marc rebuild one of the no more issues.

[A26B]

Originally Posted by KPW

Thanks! Should I fill with coolant as well, or just get everything attached?

BTW, after you drove it home hot, have you turned the engine over or tried to start it after it cooled down?

Reason for asking is.... Coolant system would have been pressurized to 16psig at shutdown. If a head gasket was compromised, it's possible that coolant could have leaked into a cylinder. If so, an attempt to crank the engine could result in hydro-lock & damage the engine.

Just to be on the safe side, I suggest you remove all of the spark plugs & spin the engine over several times. If you see coolant blown out of a cylinder, there's no need to pressure test the cooling system.