Question about Cars & Trucks
Check for grey/ white engine oil in the sump. Have a compression test done to determine if it is a head gasket or cracked head problem . Have a coolant system pressure test done to find the leak especially at the hole under the water pump shaft.
Posted on Apr 22, 2014
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Posted on Jan 02, 2017
If its the 3.1L it could be your intake manifold gasket , the material used for the gasket does not react well with GM's Dex-Cool antifreeze. The leak may not be apparent at first, but I would pressure test the cooling system. If you look at the front of the motor by the belts , try to peek down at the intake manifold and check for slight seapage to an obvious leak.
If its either of the Quad-4's they were notorious for heads warping or cracking.
Posted on Feb 03, 2009
Pressure test cooling system to determine origin of leak. Radiator and coolant reservoirs are common problems. Vehicle is very difficult to purge air from cooling system and may take multiple times of idling until thermostat opens. Sometimes help to rev engine to about 2500 rpm 5-8 times to help build heat and move coolant through system. Must have heater on while performing this task.
Posted on Mar 29, 2009
hi im not sure on this particular model but there a few easy ways to check.... take the spark plugs out, remove the broken belt, shine a light down the holes and look for dammdge, if you cant see anything you can turn the crank but it is a tricky job because you can ruin the engine so if your unsure get a mechanic to do it.. or your other alternative is to remove the head and have a look but you will need a new head gasket kit, timing belt and tensioner kit etc .. it is important that you do not turn the engine over when the belt is disconected in any way UNTIL you know for sure that valves wont hit pistons, even bending a valve will not be very noticable but when its all back together you will deffinately notice and will have to pull it all back apart
Posted on Feb 10, 2010
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For the do-it-yourself kind of mechanic, there is a kit sold by Prestone that will help you back flush the system using an ordinary garden hose. Available at most any auto-parts store, Walmart & such. It has the basic instructions on the container but I'll give you an overview.
You will need a large container to catch the anti-freeze coming out, You could drain it by removing the plug at the bottom of the radiator first , or remove the lower hose & get most of it out & then just flush the remainder, back-flushing is recommended.
There is a piece that fits into the radiator caps position that helps to aim the water towards a container but sometimes you can't use it due to size restrictions & limitations on space & have to catch the fluid with a drain pan as it overflows.
You will need to install a backflush connector "T". You simply cut into one of the 2 heater hoses, preferably the return line, and install that piece using 2 hose clamps to secure it. The garden hose hooks there.
The engine should be cool, you can crack a head or block by drowning a hot engine with ice cold water.
Just turn the water on slowly, once the anti-freeze stops coming out & it's just water, remove the drain pan & recycle what anti-freeze you can. Remember, most anti-freeze is fatal to birds & animals, including large dogs & children, so clean spills or at least dilute it with water until it is not a threat.
once done, drain the system & refill with the mix you prefer for your area, usually not less than a 50/50.
Posted on Feb 18, 2010
Does it look like it is coming from behind the pulleys? If so it probably is the water pump. It has a weep hole on it for when the bearings go out. Try tightning all hoseclamps on the hoses. If it overheats real quick then its prob water pump or thermostat
Posted on May 11, 2010
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