Loose fan pulley 2.avi

SOLVED PROBLEM - SEE LAST POSTING
1968 Ford F250
390
c6

Previously, I started a thread about a broken fan shroud and water pump replacement. I was about to fix all that, when I decided to make a small video to show the movement of the fan pulley that I mentioned in the previous thread. The movement of the fan/pulley in the video is the result of my lightly shaking the fan blade(s). A friend (not a mechanic) said it was a loose water pump, but now I'm not so sure. Until I fix the problem, I won't run the truck except to idle it --and then only briefly.
The four 1/2 inch bolts that connect the assembly to the pump are tight, as are the two belts. I didn't want to crack one of the bolts via over-tightening, so I thought I'd show the video and get some advice.
Any comments would be appreciated.

 

No vid loaded that I can see. If the nuts are tight, replace the water pump and while you’re there check the bypass tube for rot or damage and replace if it needs to be. Check it first and if it’s bad, we’ll walk you through fixing it.

 

The video link is at the top of the original posting. After double-clicking it, the link (with filename) may re-appear just above the taskbar at the bottom of the screen. You may have to click it again. I do. (Windows 10).

 

Yup, Water pump time.

 

If the pulley is bolted tight to the water pump, but the fan wiggles, the water pump bearing is shot.

 

I WOULD NOT RUN THE TRUCK at all until the pump is replaced. If the water pump was loose, there would be coolant leaking everywhere.

If the shaft snaps, while running, you're going to have a lot more problems than replacing a water pump. Just my $.02

Murphys Law: Whatever can go wrong will go wrong!


Dan

 

I've had loose water pump shafts before but not leak coolant. You need a new water pump.

 

2X Steve340.

 

OK. It's unanimous. The truck stays where it is. I'll pick up a water pump tomorrow. Thanks to all, especially to TeachNLive4ever, who contributed multiple comments. I'm going to take it slowly, as I've had limited mechanical experience; hopefully, this thread won't go on forever.

 

This your first 390 water pump? Put thread sealant or RTV on the bolt threads; some of them go into the water jacket.

 

Should the gaskets be sealed with what would be used on the bolt threads? I watched one video on Youtube about water pump replacement on a smaller block. I'm assuming most things would be the same for my truck: drain radiator; disconnect lower radiator hose from pump. His vehicle did not have a heater, so he switched a plug from the old pump to the new. (There was also a second set of hands assisting him at certain junctures; hopefully that was more for convenience than necessity.)

 

My 19 year old son did his first water pump a few weeks ago. What hemmed him up was the by pass tube. You got this. Note where the bolts came from. I lay them out on the ground in the fashion I removed them.

 

I am picking up the water pump today. I just watched a video that states that sealant is not necessary on a properly cleaned surface, that sealant was not used at the factory during the original installation. The video goes on to say that RTV sealant often causes problems. Should it be used or not?

 

I have a few gallons of unopened antifreeze that I purchased 4 years ago. Is it still usable?

 

That’s a VW video. I always put a thin coat of RTV sealant
Your antifreeze is still good