1990 Pontiac Grand Am. Anti freeze leaking. Replaced heater Core, Replaced water pump. still leaking. Any suggestions?.

Asked by Jan 13, 2013 at 04:56 PM about the 1990 Pontiac Grand Am 4 Dr LE Sedan

Question type: Maintenance & Repair

Badly Leaking antifreeze. Have replaced Heater Core and Water pump. Any suggestions

5 Answers

310

check petcock, around hose fittings and hoses, radiator, if coming from engine and/or exhaust also, maybe replace head gasket, depending on how much you really want to keep it. maybe try using a bottle of dye and a black light at dark. wipe and/or carefully spray engine cleaner on hoses, radiator, etc first

93,495

If it's a V6, look at the lower intake manifold gaskets. Check in at GAOwnersClub.com for DIY instructions and pictures.

Rent, beg, borrow, or steal (just kidding) a pressure tester that goes on the radiator cap and it will pump pressure in to the system. Then look everywhere, but one thing..is it leaking INSIDE the car on the floor? Or puddles on the ground? if so watch your cat or whatever, they love the stuff

310

okay. only means heater core. they can crack too gd easy around seams. recheck your connections,the unit to hoses, maybe remove to clean and polish the male fittings and scrub inside the hoses. pressure check it again to confirm that thats the exact issue, and exchange it

Thank You all for your answers/suggestions. First point. Car has been in my family since it was brand new. Until it breaks me, I will try. 16 year old son learning from it now. Replaced Heater core after drivers side floor board flooded. (Had already replaced water pump at this point).Have not tried the pressure test yet. Have not replaced hoses yet. Looking as if it may be a defective water pump (front gasket). Dripping from lower weep hole now. at a slow small drip right now, tomorrow it may spew! (UUUGGGH) Thanks for the ref to link to owners club. .Either way water pump and heater core still under warranty. :o) Just time involved is getting aggravating. P.S I think they have modified antifreeze now so it does not taste sweet. Cat is still alive. LOL

Your Answer

Add photo

Related Questions

Grand Am

Looking for a Used Grand Am in your area?

CarGurus has 1,665 nationwide Grand Am listings starting at $1,995.

ZIP:

Search Pontiac Grand Am Questions

Pontiac Grand Am Experts

#1 tenspeed
tenspeed
Reputation 7,430
#2 John Saffrahn
John Saffrahn
Reputation 1,550
#3 Tom Demyan
Tom Demyan
Reputation 1,360
View All

Related Models For Sale

Used Pontiac Grand Prix
27 Great Deals out of 3,749 listings starting at $879
Used Pontiac Firebird
13 Great Deals out of 797 listings starting at $2,991
Used Ford Mustang
396 Great Deals out of 44,403 listings starting at $1,000
Used Chevrolet Camaro
306 Great Deals out of 38,867 listings starting at $1,250
Used Toyota Camry
1,080 Great Deals out of 98,047 listings starting at $1,250
Used Honda Accord
883 Great Deals out of 82,090 listings starting at $999
Used Pontiac Bonneville
6 Great Deals out of 674 listings starting at $1,599

Used Cars For Sale

2004 Pontiac Grand Am For Sale
439 listings starting at $2,995