Water Pump? Need 2nd Opinion!

[TheHardWay]

New noise in engine compartment of my 77 FJ40:



Took a 29 mile drive this morning, 45mph through local pecan orchards. Popped the hood when we got home and took the video.

What I noticed:
engine temp didn't reach the halfway mark
the fan is spinning with a slight wobble

Suspect #1 is water pump

Please give it a listen and what it sounds like to you.

 

[pb4ugo]

The video is listed as private. When you grab the fan does it wobble? If so the pump is likely bad.

 

[TheHardWay]

The video is listed as private. When you grab the fan does it wobble? If so the pump is likely bad.

Oops, sorry about that. Just now changed it to Unlisted. Hope that works, if not I have one more option. God, I am so new to this video world of YouTube. I'll grab the fan in the morning and report. Thanks!

 

[charliemeyer007]

Mine mostly run at that spot on the gauge. Stereo can help identify location of noise (your ears) mono from the computer speakers not so helpful.

You have the shaft into the water pump - if its real loose good chance it will be now or soon leaking out of the weep hole.
Then you have the pulley and fan end. Not a fan of those fan clutches. Check the bolts for tightness, wiggle pulley and fan separately.

I hear some ticking - check your valve lash. While cover is off, fire it up and watch the rockers. I had #1 E rocker pivot on the shaft instead of just rotate on a used engine I bought. I think it sounded like yours but that was back in like 2005. Shaft was worn on the bottom allowing it to pivot sideways. New to me rockers and shaft fixed that issue.

 

[fjwagon]

I hear two types of sounds that bother me, the first one is the rattling, possibly a bad bearing somwhere...maybe loose hardware...possibly the throwout bearing bad, pressure plate loose(probably not but still give it a check). The other is the ticking...what Charlie said.
Also check the fan clutch, I think if the shaft on the water pump was loose, it would probably be leaking.

 

[TheHardWay]

The video is listed as private. When you grab the fan does it wobble? If so the pump is likely bad.

Just checked the fan - solid, no wobble. Later today I'm gonna remove both belts from the water pump pulley and check the fan again.

 

[TheHardWay]

Removed belts before lunch. This is what I found:



Fan is firmly attached to the pulley. Pulley, and I assume the pump shaft, are kinda wobbly, and some antifreeze leaked out the mount while I was wiggling the fan.
Time to order a new pump?

 

[rlong]

Yes, classic bad water pump, worn bearing

 

[TheHardWay]

Before I order a new water pump assembly and a tube of FIPG, is there anything else I will need?

 

[73FJ40]

Before I order a new water pump assembly and a tube of FIPG, is there anything else I will need?

How old are the belts?

 

[charliemeyer007]

Same for hoses - some are getting hard to find?

 

[TheHardWay]

How old are the belts?

At least 5 years old, when I bought it. When I remove the broken water pump I'll inspect them closely.

 

[TheHardWay]

While we're waiting for the replacement pump to arrive, how about some forensic "before" pics? First one was taken after removing the fan, clutch and pulley:

My biggest fear was that the bolts might be frozen and break. Turns out I had loosened and replaced 3 of them 5 years ago, so they all came out easy peasy.
Second pic is the water pump, the original I think:

The shaft is no longer snug, and turns with difficulty - bearing gone bye bye. Third pic was taken after I cleaned out the inside of the pulley:

There is a deep groove inside the backside of the pulley, where I found and scraped that heap of crud out. Last pic is of everything scraped clean, ready for installation:

Questions? Comments? Tips? Now's the time to speak up!

 

[fjwagon]

I like to rub grease at neck before installing the hoses. Check cracks on belts I bend the belt opposite of how they are normally installed. If they old replace them regardless. Good insurance. And I use distilled water with antifreeze and use antifreeze tester. Some folks use 50/50 and call it good. And I have bad habit of collecting bad parts. In some countries you could actually buy a repaiar kit to rebuild your original water pump. And of course I check for loose belts and hardware after driving it. Several days later I do it again. And most importantly and obviously check for leaks. While you are there check heater hose for cracks. They are cheap so I usually buy several feet and replace them. And again they are cheap and good insurance.

 

[fjwagon]

The oem manual shows how to test the thermostat.