If the coolant is low and there are no obvious external signs of coolant leakage (no coolant dripping from the engine, water pump, radiator or hoses, or under the dash on the passenger side of the car from the heater core), the cooling system should be pressure tested to see if there is an internal leak.
#Coolant leaking from water pump on a gm 3.1 v6 crack#
There may be an external leak somewhere in the cooling system such as a hose, the water pump shaft seal, or the radiator or heater core, or there may be an internal leak in the engine or intake manifold (a bad head gasket or intake manifold gasket, or a hairline crack in the cylinder head or block). The most common cause of a low coolant level is usually a leak. But in most instances, the engine overheated because the coolant was low or there was a problem in the cooling system that caused the engine to run too hot.
In some cases, that may be all that’s needed. Or maybe I have a faulty sensor/thermostat/computer module since my fans never run when it overheats and it never overheats when my fans actually turn on? If it’s a head gasket I’ll deal with it but at this point I am a little skeptical.Many motorists assume that if their engine overheats, all they have to do is wait until the engine cools off, open the radiator cap or coolant reservoir cap, then pour in some more water and antifreeze (or premixed coolant). It sounds more like I have a coolant flow problem (maybe the new water pump is faulty?) because every time I rev it, it cools down immediately. Then at another random interval, it will start overheating again.Ĭan anyone help me out? It doesn’t sound like a head gasket going bad to me but then I’ve never had one go out on me. The other strange thing is that it will overheat for awhile and then stop and go back to normal operation, my fans will work again, and the temperature never climbs past 210. It only starts to overheat once it has been running for awhile, whenever it does overheat neither of my radiator fans turn on, turning to the right while driving cools it down, turning it to the left while driving allows it to overheat again, revving the engine when it overheats ALWAYS cools it back down at least for awhile. I finally managed to nail down a sort of pattern to the overheating. I was not satisfied, I hadn’t had any problem until after the water pump was replaced and I’ve never had any major engine issues. I took it back in and they told me it was probably my head gasket but they couldn’t see any visible evidence of it going bad so they said it must be in the early stages. I live about 5 - 10 minutes from work and as soon as I drove it longer than that, it started overheating at random intervals. So they replaced it and all was good for about a day or two. Not surprising, I had suspected it was having issues. I had been having a problem with my coolant leaking so I took it in to a shop I usually trust, they pressurized the system and found my water pump was leaking. Anyway, I have a problem with my car that I was hoping someone could help me with.Īs the title states I own a '96 Grand Prix GTP with the 3.4L engine. Hello all! I’m new to the forums but not new to the show, my dad and I have listened to it for several years.
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