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...you start to see some evidence of moisture around the weep hole? Not a drip (yet) but I'm looking at the bottom of the w/p and there definitely is a small area around the weep hole that looks like it has been wet. Nothing dripping, pooling on the ground or puddle on the drive belt (underneath). But I guess this is an indication that the pump is going? Is it recommended to change or is this something that is the norm and can hold off on doing for now? It's on a bone stock 96 BBB with 123k on the odo. This is the second w/p (AC Delco brand).
 

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I did 4 WP 81K miles the one on now is not weeping.. its a crap shoot...

if you have a stain around the weep hole that is normal .. before starting cold place finger on the weep hole .. you will feel the hole..

also if it does a little weep the drain hose trick works for me .. when it leaks I will see a coolant stain on pavement not the opti ....
put that hose on @20k miles vehicle still under warranty .. dealership says it weeps .. I said that is B/S !
 

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When I do decide to replace, do I go with the $200+ AC Delco unit or are there aftermarket products that are reliable replacements?
 

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When I do decide to replace, do I go with the $200+ AC Delco unit or are there aftermarket products that are reliable replacements?
ac delco parts for these vehicles may not be ac delco like 20yrs ago..
I purchased a ac delco belt tension-er 2 yrs ago .. 4K miles it failed caused binding made loud noise on a cold start .. put in a after market back up no loud noise.

I would install the hose .. easy to see if it leaks and if it does no worry .. when you have parts/time/weather good change it.. if no hose panic mode ..cheap insurance..
 

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I'm a little unclear as to the "hose" trick. Can you explain? Are you inserting a small diameter hose into the weep hole and then running it off to the side so that if there is any leak, the coolant doesn't go onto the Opti? What diameter hose would this be?
 

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Just going on-line to the Parts Geek website, I see other manufacturers such as Bosch, Gates, GMB, Airtex, A1 Cardone,....then there's the other brands available through parts stores such as Autozone, O'Reilly and CARQUEST.
 

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They're mostly all same brand, just in a different box.
I'd venture a guess probably only 1,2 or 3 manufacturers.
Do the hose trick, unless it's peeing a little evidence of water staining isn't anything to worry about IMHO.

The last few ACDelco parts I've bought were cheap offshore junk, just like everything else offered. Certainly NOT worth the additional cost I paid.
Some of the parts went back, because they were very lacking in quality.
 

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info on the weep hole drain mod i did....

http://www.impalassforum.com/vBulletin/53-heating-cooling-hvac/1250881-wp-weep-hole-drain-mod.html

There are/were 2 AC Delco WP's available. This has both the part numbers and check the last post for a link to the 252-700 I went with. So far so good.

http://www.impalassforum.com/vBulletin/53-heating-cooling-hvac/1297417-ac-delco-water-pumps.html
4DOOR, Just a little to let you know. Even though I don't have an opti. I would do this if I did. As usual your detailed description and pictures always help. I got to look at your oil cooler and trans line cooler again. Materials are in my room for these mods. Kudos

Mark: Snowman-33
 

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I'm a little unclear as to the "hose" trick. Can you explain? Are you inserting a small diameter hose into the weep hole and then running it off to the side so that if there is any leak, the coolant doesn't go onto the Opti? What diameter hose would this be?
yes I used a plastic vac barbed fitting stuck in weep hole connected to a vacuum rubber line then set off to the side.. don't need a big hole because it does not blow out lots of coolant just drips .. but the drips can and do get sucked into the opti as the opti with leaks/old has slight vacuum in it with the venting ..I put sealant around the fitting and weep hole surface for security..

I have yet to find a perfect opti with no leaks...so you do not want to have this weep hole drip on it ..

I did get some coolant in my opti what happened was to me and another member the rear WP seal just blew out .. I guess it was not properly seated .. aluminum reaction to the steel ..
 

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4DOOR, Just a little to let you know. Even though I don't have an opti. I would do this if I did. As usual your detailed description and pictures always help. I got to look at your oil cooler and trans line cooler again. Materials are in my room for these mods. Kudos

Mark: Snowman-33
Glad you found it helpful and GL with your hose mods. Wasn't crazy about spending the money but glad I did the AN fittings and braided hose on both sets of lines. They look a heck of a lot better than my first fix with brass fittings and hose clamps and waaaay more reliable than the GM seepers. 0:)
 

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I'm on my 3rd waterpump, I think. I had the rear seal blow out and bearings go flying on my last one. This most recent is the most expensive one I could get at O-Reilly's, and it seems to be doing great, and its rear seal seems better than on the previous, which was from NAPA. I have had bad luck with NAPA parts recently. The thermostats I was getting from them didn't have a thick enough rubber gasket to seal, and they weren't opening at the proper temperature. The O-Reilly's installed perfectly and worked perfectly. I also have some very honest people at O-Reillys who tell me which parts they offer are not worth buying...I guess they don't want bubbas throwing them back through their windows later on...

V
 

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yes I also had one WP do , the rear seal blow and the bearing fly out..
on the T stat leaking the goose neck can corrode as it seats on the T stat gasket.
also possible the WP is not cut properly , too deep so it will leak.

before install check that out ..I have seen [not on my vehicles ] a gasket used to increase the sealing on top of the T stat rubber gasket.. a sealer product to hold it in place. worn goose neck corroded cheaper fix..I keep the old T stats .. buy new stant type.. has the weep hole in it , so flow keeps it regulating very good..having an old one that was working helps troubleshoot easy..I keep the old parts also for fabrication ...compare to new..

if you / when you remove the goose neck place finger on the inside of the metal, if its gray color then your coolant is not working .. this is from low % of antifreeze and the use of NON distilled water.
drinking water will destroy the coolant system some very fast other areas slower..
 
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