Strange Water pump problem??

88-378

Member

Aug 10, 2007

14

2

16

Alpharetta, GA

Feb 24, 2010

#1

• Feb 24, 2010

• #1

Ok, I have a new water pump on the newly rebuilt engine. The last two days it has had a few drops under the balancer on the floor. It is coming from the weep hole.

However, It dies not do it while running and only when I let it sit overnight. Very small amounts.

Another thing that was weird is that when i went to check the coolant level, it still had pressure on it. So, I drained a bit from the radiator, cleaned everything up and ran it until operating temp and so far it has not leaked out of the weep hole.

Should i just go ahead and replace the pump?

 

88-378

Member

Aug 10, 2007

14

2

16

Alpharetta, GA

Feb 24, 2010

#2

• Feb 24, 2010

• #2

My wifes stepfather, who races, said it may have been I had overfilled the radiator and the that made excessive pressure and it weeped.

He said if it hasn't done it since i drained some coolant out then i should be ok. He said run it a few more times and keep an eye on it.

 

88-378

Member

Aug 10, 2007

14

2

16

Alpharetta, GA

Feb 24, 2010

#3

• Feb 24, 2010

• #3

Still not leaking! Weird...

 

Repostyle

Member

Jun 11, 2005

538

0

16

Portland, OR

Feb 24, 2010

#4

• Feb 24, 2010

• #4

Glad we could help! LOL

 

capri debris

Member

May 5, 2007

289

6

18

PA

Feb 25, 2010

#5

• Feb 25, 2010

• #5

It's not possible that overfilling causes too much pressure to build, the cap is what regulates pressure in the system.

There isn't much that can go wrong with a water pump, they are very basic designs. A housing, shaft, impeller, bearing and seal. The seal may have needed some time to "seat in"... though I've never heard of the seal needing seat in time... may have just been a fluke. Keep an eye on it and if it leaks again, just replace it.

 

88-378

Member

Aug 10, 2007

14

2

16

Alpharetta, GA

Feb 25, 2010

#6

• Feb 25, 2010

• #6

I hear ya. I can't explain the pressure that it still had the next day while totally cool.

No leak this morning either. I am going to give it a flush this weekend. I may have loosened some scale or rust in the radiator. The rad is pretty new, it's just been in storgae while i was restoring. shouldn't be too bad.

I am also wondering if the restrictor i installed for the heater core had something to do with it?

 

88-378

Member

Aug 10, 2007

14

2

16

Alpharetta, GA

Mar 2, 2010

#7

• Mar 2, 2010

• #7

capri debris said:

It's not possible that overfilling causes too much pressure to build, the cap is what regulates pressure in the system.

There isn't much that can go wrong with a water pump, they are very basic designs. A housing, shaft, impeller, bearing and seal. The seal may have needed some time to "seat in"... though I've never heard of the seal needing seat in time... may have just been a fluke. Keep an eye on it and if it leaks again, just replace it.

Click to expand...

Finally! Found it was a bad cap! Still hasn't leaked, replaced the cap and all is fine.

 

84Ttop

They make new pistons every day, so why worry?

5 Year Member

Jul 2, 2009

5,222

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South Jersey

Mar 2, 2010

#8

• Mar 2, 2010

• #8

Dang, too late, as I was reading down I was thinking, bad cap. Glad you got it fixed though