re[placed waterpump. still leaks. how do i find the leak

Asked by Jun 14, 2012 at 05:20 PM about the Pontiac Grand Am

Question type: Maintenance & Repair

3 Answers

65

I had the same problem with a 2000 Chevy Silverado Z71. I had to replaced the radiator after 180,000 miles and decided not to initially replace the water pump (if it ain't broke don't fix it). What can and did happen in my case is that hard water scale, almost like crushed rock, can be freed up from your cooling system any time you change a cooling system component. My water pump worked fine and had been changea about 3 years earlier. The gears that turn your water pump are kept dry by a rubber seal. If you get any loose debris in your cooling system (that hard water scale in my case) it can deteriorate that seal in your water pump and the pump starts leaks a slow leak from a weep hole in the front of the pump itself, usually located behind the fan blade. It is always a good idea to do a system flush before replacing your water pump. I did not flush mine because I was replacing the radiator and all the hoses. The scale that I dislodged was in the engine. It is also possible to get a water pump, especially a refurbished one, with a bad seal. Its hard to see the water coming out of that weep hole because of its location behind the fan blade. I had to get underneath with a flashlight and still it was hard to find. I hope this helps.

pressure test the system & look with a bright drop light .if it was the water pump & it still leaks from the water pump you either didn't clean the surface or you left something loose. you have to remove the old gasket or it will never seal. if it s not the water pump sounds like a hose or head gasket.

7,015

to look around the weep hole and lower areas, i use a small mirror. something like a 3"X4" girl's purse type or dental nickel size. small mirrors plus a flashllight are good to get by tight areas you need to see.

Your Answer

Add photo

Related Questions

  • oil leak 2 answers

    My 2002 Pontiac grand am is leaking oil somewhere but I'm not sure where. I can see it leaking from underneath the car but not exactly sure where the leak is.

    2002 Pontiac Grand Am

    -

    Maintenance & Repair

  • where do i put liquid aluminum in a 2000 pontiac grand am 2 answers

    I have a leak under my car and i need a temporary fix(coolant is leaking)

    2000 Pontiac Grand Am SE

    -

    Maintenance & Repair

  • Over heating 2 answers

    Orange fluid leak

    1995 Pontiac Grand Am 4 Dr SE Sedan

    -

    Maintenance & Repair

  • Leaking of coolant 3 answers

    Coolant is leaking from under my car on the drivers side. Located under my battery tray right next to my fans. What do I do? I think it's either the radiator or the pipes. Please help!

    2004 Pontiac Grand Am SE2

    -

    Maintenance & Repair

  • 2000 pontiac grand am/ 2.4l water leak 1 answer

    put anti freeze in and it was leaking out, what could it be other than the water pump

    2000 Pontiac Grand Am SE

    -

    General

Grand Am

Looking for a Used Grand Am in your area?

CarGurus has 1,209 nationwide Grand Am listings starting at $2,450.

ZIP:

Search Pontiac Grand Am Questions

Pontiac Grand Am Experts

#1 tenspeed
tenspeed
Reputation 7,610
#2 John Saffrahn
John Saffrahn
Reputation 1,600
#3 Tom Demyan
Tom Demyan
Reputation 1,410
View All

Related Models For Sale

Used Pontiac Grand Prix
26 Great Deals out of 2,869 listings starting at $1,477
Used Pontiac Firebird
9 Great Deals out of 737 listings starting at $3,488
Used Pontiac G6
69 Great Deals out of 4,128 listings starting at $699
Used Chevrolet Impala
556 Great Deals out of 30,772 listings starting at $799
Used Ford Mustang
448 Great Deals out of 45,460 listings starting at $2,700
Used Chevrolet Camaro
186 Great Deals out of 31,082 listings starting at $1,217
Used Pontiac GTO
10 Great Deals out of 452 listings starting at $5,000
Used Honda Accord
796 Great Deals out of 85,752 listings starting at $1,100
Used Chevrolet Malibu
880 Great Deals out of 79,181 listings starting at $1,500
Used Pontiac G8
22 Great Deals out of 358 listings starting at $6,500
Used Nissan Altima
986 Great Deals out of 80,586 listings starting at $2,000
Used Dodge Charger
360 Great Deals out of 27,622 listings starting at $2,033
Used Dodge Challenger
147 Great Deals out of 23,854 listings starting at $7,999
Used Honda Civic
610 Great Deals out of 89,016 listings starting at $999
Used Toyota Camry
961 Great Deals out of 89,958 listings starting at $750

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.