Leaking from the weep hole? Using AC delco pump or aftermarket? Very strange, mines original and I've got 180K miles so far.

 

The first two were done at the dealer. The 3rd was at my mechanics. Not sure on brand.

 

It's time you find out what they have been installing:thumb:. AC Delco is what they should be installing with a welded impeller.

 

OK. Really getting tired of this problem. The 4th pump lasted just over 14000 miles and, and almost to the day 1 year! Leaking out the weep hole. My mechanic is stumped. So let's recap.


1st was replaced within 30 day warranty of buying truck. At Chevy with OEM replacement.
2nd was replaced within a year of 1st going in the truck. At Chevy with OEM replacement.
3rd was replaced about 1.5-2 years of 2nd going in the truck. At my mechanics with an OEM replacement.
4th was replaced within a year of 3rd going in the truck. At my mechanics with Autozone purchased part.
5th was replaced within a year of 4th going in the truck. At my mechanics with Autozone purchased part.


Now, all of the pumps besides the 3rd one were warrantied parts. No cost to me for the part. But, the labor was $500 bucks for the 4th and 5th.


It is not an overheating issue that is the problem. The pump just starts leaking badly out of the weep hole. Coating the underside back to the T-case in coolant. The last time it happened, low coolant light came on and I was driving at 75mph for about 1.5 hours to get home. Just kept my eye on the temp gauge. Next morning fill the reservoir with a gallon of distilled water only to make it 4 miles down the road before the low coolant light came back on. Then after that stopping in traffic I noticed the temps going up. But got to the shop and all was fixed.


So I am now on pump #5, in 5 YEARS!!! SO PLEASE, ANYONE, HELP!!!

 

Take a good straight edge and check where it mounts to the timing cover to see if its warped. If it has a high spot it could influence internal stress on the pump housing possibly causing problems.

Its a long shot but that's about all I can come up with... unless your running sand in with your coolant.:HiHi:

 

Dam man i still have my oem w/p on my truck with over 220k miles

 

That's crazy and yea sucks. I wonder if you have some kind of strange grounding issue. An electrical potential in system that is causing the seals to fail early. Are u running fresh dexcool /distilled water? Just putting ideas out there. I would tear this one apart and inspect the seals just see what is going on.

 

Have you replaced the water pump housing or just the water pump.

 

where do you live? if your running just straight water is there a chance it's freezing a bit and taking out your seals?

 

There could be a problem somewhere else in your system that is causing flow issues.

 

Wonder if there is some type of contaminate in the cooling system that is taking out the seals. Before I would put another pump in a complete flushing of the block would be done.

 

seems to me you need to split the problem up to solve it.

option 1-

the pump is not sitting in the correct spot. (high spot, warpage Chinese made pump housing that was installed just before you got it). Then it proceeded to trash 5 pumps.

check the geometry and see if its whacked. if so then get some OEM (GM) parts and fix it

If all that is good then :\

Option 2-

There is a foreign material in your coolant that is eating up the pump seals. The stray current theory is valid but highly unlikely unless you are running ultrapure coolant with almost no conductivity.:confuzeld

my guess would be that the coolant is contaminated if you end up at this option

the smoking gun would be to cut open an old failed pump and do an autopsy to look at seal and see what is in it.

you could also strain some of your coolant threw a coffee filter and look for sand or some other abrasive debris.

good luck. I would start with option 2 it will be easier to trouble shoot on your own and less money

keep us posted

If you were close I could help:2cents::2cents:

 

What he said about checking the rest of the system. I'd think if there was a restriction that it would have to come out there.. Thermostats, bypasses etc.