Water pump issues

[JustinCydeher]

Hi I'm Justin I drive a 99 GMC Sierra 15004wd with a 4.8. recently I replaced the water pump. At the time I was dirt poor broke but I had only 1/2 a gallon of antifreeze. With full intentions of getting some on payday I put that 1/2 gallon in and the rest water. Going for a short out of mind I forgot to get more antifreeze and I drove my Chevy Malibu on an out of town business tripfor two weeks. During that two weeks my hometown had some unexpected cold weather and my truck froze up it pushed in the back off my brand new water pump I put RTV on it and put it back on but it didn't hold. I tried putting another waterproof sealant called lexel. It did not hold either is there anything I can put on it that will hold to the pressure of the water pump?

 

[MrMarty51]

Hi I'm Justin I drive a 99 GMC Sierra 15004wd with a 4.8. recently I replaced the water pump. At the time I was dirt poor broke but I had only 1/2 a gallon of antifreeze. With full intentions of getting some on payday I put that 1/2 gallon in and the rest water. Going for a short out of mind I forgot to get more antifreeze and I drove my Chevy Malibu on an out of town business tripfor two weeks. During that two weeks my hometown had some unexpected cold weather and my truck froze up it pushed in the back off my brand new water pump I put RTV on it and put it back on but it didn't hold. I tried putting another waterproof sealant called lexel. It did not hold either is there anything I can put on it that will hold to the pressure of the water pump?

Sad to say, it may have also destroyed the seals within the pump.
You maybe could try an auto salvege and see if they would let You have one from a stray pump.
Also, did You check to be sure that the cover is flat ? If it is not flat then try tapping it flat. Especially around where the bolts holds it down.

 

[MrMarty51]

The seal may be able to be tested by installing the plate then placing the pump on its nose, filling it with water to the top of the coolant ports and watching if it does leak.
If there is a heater hose connection to it, that can be plugged with a short length of hose and a bolt with a couple of clamps.

 

[jrsavoie]

Hope there wasn't other damage done to the block or heads

 

[dbrannon79]

@JustinCydeher Welcome to the forum. help me understand what you are talking about when you mentioned

my truck froze up it pushed in the back off my brand new water pump

I looked online for a couple of photos of the actual pump to see what were are talking about. are you referring to the center part of the pump where it looks to have a press fit or bolt on cover? is this what got pushed out and is now leaking?

two photos below: first one is an AC Delco pump, second is an Airtex brand pump.

 

[JustinCydeher]

@JustinCydeher Welcome to the forum. help me understand what you are talking about when you mentioned



I looked online for a couple of photos of the actual pump to see what were are talking about. are you referring to the center part of the pump where it looks to have a press fit or bolt on cover? is this what got pushed out and is now leaking?

two photos below: first one is an AC Delco pump, second is an Airtex brand pump.
View attachment 71995View attachment 71996

Yes my pump is like the press in. I put it back in and put RTV on it and it held for about a week and worked fine.the only other damage I think was it busted the thermostat housing and my heater core. I have replaced both

 

[Twisted Steel Performance]

Me thinks you will need another pump...

 

[dbrannon79]

x2 on need a new pump. is the one you have under any warranty? if so, I would pull it and go have it swapped out. just tell them it came apart. clean off any silicone from the outside where you repaired it and take it in.

 

[MrMarty51]

Driving down the road and it blew apart.

 

[jrsavoie]

Driving down the road and it blew apart.

I've had that.

 

[denata]

Usually breaks the expansion tank.
Justin, make photo your pump.

 

[dbrannon79]

I would also be taking a good look at all the freeze plugs to make sure it didn't start pushing any out. last thing you want is one slightly pushed out and not leak till your out on the road somewhere!