93 water pump questions
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Intermediate
Joined: Oct 2003
Posts: 48
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From: littleton co
93 water pump questions
I just picked this up this summer and have noticed it intermittently running hot. Checked the maintenance records realized that this has had FOUR water pumps installed (Less Than 61k miles). That blows. Looks like this one's leaking also and destined to be changed also. What's the failure mode? Do the impellers wear out? Is it just a gasket leaking? Are some water pumps better than the stock ones?...I've seen some writings about the electric ones but prefer to stay stock. Any ideas on the intermittent overheating...mostly at idle. Heater often doesn't push hot air. :banghead:
Le Mans Master
Joined: Feb 2000
Posts: 9,600
Likes: 88
From: Springfield PA
Philly 'Burbs Events Coordinator
Re: 93 water pump questions (ritchiem)
When they go bad it's from the weep hole on the very bottom. Maybe the cooling system is clogged? Possibly preventing it from doing it's job and causing premature water pump failure?
Rereading your post about the heat, that sounds like a clogged up heater core. I had that and disconnected both heater hoses and flushed both ways with a hose. Took several flushes before I got a good clean stream of water. And I have heat again :cheers:
[Modified by Rex Ruby, 10:45 PM 11/30/2003]
Rereading your post about the heat, that sounds like a clogged up heater core. I had that and disconnected both heater hoses and flushed both ways with a hose. Took several flushes before I got a good clean stream of water. And I have heat again :cheers:
[Modified by Rex Ruby, 10:45 PM 11/30/2003]
Melting Slicks
Joined: Jul 1999
Posts: 2,875
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From: Olive Branch (Memphis suburb) MS
Cruise-In II Veteran
Re: 93 water pump questions (ritchiem)
Here's the second one from my 92 after about 45,000. the first one also lasted about that long. Flush the heater core, clean and flush the radiator, then replace the thermostat(cheap insurance). 
:steering:
:steering:
Burning Brakes
Joined: Feb 2000
Posts: 824
Likes: 2
From: Camden SC
Re: 93 water pump questions (Ramrod92)
4 Pumps, wow.
I would ask if any or all were rebuilts. I have seen "remanufactured" water pumps (not LT1's) not make it out of the shop. As stated above, flush out the heater core, replace pump, thermostat, make sure you have a fresh 50/50 mix, make sure the radiator area if clean, check all hoses. After about 6 months, check the water's pH level. I believe the service manaul gives a range.
4 pumps, gotta be a reason for that.
dlmeyers 90 coupe zf6 3 speed shocks
I would ask if any or all were rebuilts. I have seen "remanufactured" water pumps (not LT1's) not make it out of the shop. As stated above, flush out the heater core, replace pump, thermostat, make sure you have a fresh 50/50 mix, make sure the radiator area if clean, check all hoses. After about 6 months, check the water's pH level. I believe the service manaul gives a range.
4 pumps, gotta be a reason for that.
dlmeyers 90 coupe zf6 3 speed shocks
