Question about GMC Safari

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I have radiator fuild leaking out, what looks like the big fan that cools the radiator. So I think there might be a leak in a gasket or something??? Could you give me some advice???

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  • Master
  • 3,092 Answers

If it's leaking out of the back of the pulley that turn the fan, it's going to be your water pump, water pump has a little hole that when the pump is starting to go bad water will leak out of that hole, the only fix is to replace it.

Posted on May 25, 2010

  • 3 more comments 
  • basilerock May 25, 2010

    That makes sense, but its leaking all the anti-freeze. And its like as soon as I pour it in it comes out. I had it full on Sunday, and today it was empty. Do you still think its the water pump??? And if so, do you know about how much something like that would cost, or do you think with a manul or something I could fix it???

  • Alexander Mimun
    Alexander Mimun May 25, 2010

    Water pump run's about $35.00 and yes with a manuel you should be able to knock it out.

  • basilerock May 25, 2010

    I am scared about all the belts. There is a belt around it. How will I retighten the belt? Is there a trick to it. i have had trouble in the past. i think i have some good directions on how to fix it but do you recomend any thing that help direct me, maybe a website or a book fom the library?

  • Alexander Mimun
    Alexander Mimun May 25, 2010

    Just watch how you take apart, but a book from the library not a bad idea.

  • basilerock May 25, 2010

    Thank you! You have been exremely helpful.

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Posted on Jan 02, 2017

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My 350 chevy engine has been bored 10 thousands and I have it in a1960 chevy pickupand it gets hot setting at an idle. Have put a new 3 core radiator on it and also have an electric fan


Dear Bobby,
Here are some ideas for you.
You might want to start by asking some mechanics if they think there is something wrong inside the engine causing your overheating.
If so, something may be failing, like bearings, or perhaps there is a tiny crack.
If they do not think so, here are a few other items.
Some people might try a heavy duty water pump.
Some try adding yet another radiator for more cooling. ( I have seen some mount another radiator in the truck bed, my next door neighbor did.)
Be sure your lower radiator hose is not sucking together.
Sometimes the coil spring inside the hose can slip or rust leaving a section of the hose to collapse..
You might not see this happening unless you looked for it.
Be sure your water pump/fan belt is not slipping.
Be sure your engine block is not rusty inside.
God bless your efforts.

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Does anybody have a video link on how to flush the cooling system on a GM 3.1L SFI OHV 6cyl motor? I need a vid for this particular motor cause mine is still overheating & i have looked everywhere.


flushing a cooling system is the same method as any other motor

do it without the thermostat fitted
or water pump opening

sacrifice an old radiator hose to adapt a garden hose fitting
for radiator flush

air in system fix
your thermostat housing has no air bleed valve
no top radiator cap

old school way
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run motor till thermostats fully open
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turn off heater
correct level in over flow bottle

why still over heating
you fitted everything i would have ... yet still overheat
possibles
leaking inlet manifold gaskets
hose clamps loose
cooling fans spinning too slow
thermostatic fan switch faulty
aluminum radiator is a big one
air ..fins bent or some water channels blocked

or possible head gasket leak




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CHECK FOR COOLANT LEAKS AROUND THE RADIATOR LOOK DOWN BETWEEN COOLING FANS AND RADIATOR SIDES FOR SIGNS OF ANTIFREEZE.CHECK ALL RADIATORS HOSES AND HEATER HOSES.IF ALL LOOK GOOD CHECK ENGINE OIL FOR COOLANT LEAKS.IF OIL LOOKS LIKE MILK SHAKE COOLANT LEAKING IN CRANK CASE.YOU HAVE A HEAD GASKET LEAK.YOU NEED TO CHANGE OIL + FILTER. GET THE HEAD GASKET FIX.BECAUSE LEAK IN THE CRANK CASE WILL LOCK UP THE ENGINE.IF CRANK CASE OIL LOOKS OKAY.YOU DONT HAVE THE COOLANT CORRECT MIXTURE.YOU SHOULD HAVE 50/50 ANTIFREEZE AND WATER.

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CHANGE THERMOSTAT AND RADIATOR PRESSURE CAP.CHECK COOLANT LEVEL.MAKE SURE YOU HAVE 50/50 ANTIFREEZE AND WATER.MAKE SURE COOLING FANS COMING ON WHEN ENGINE REACHES 190 DEGREES.TO SEE IF COOLANT FANS RUNNING TURN ON CAR AIR CONDITIONER TO SEE IF FANS RUN IF NOT CHECK COOLING FANS FUSES.IF FUSES GOOD I AM LOOKING AT A FAULTY COOLANT TEMPERATURE SENSOR.IF ALL IS GOOD.NO LEAKS AT RADIATOR HOSES + HEATERS HOSES. NO LEAKS AT WATER PUMP WEEP HOLE OR GASKET.NO LEAKS AT RADIATOR.LAST RESORT CHECK ENGINE OIL. IF LOOKS LIKE MILK SHAKE YOU HAVE LEAKING HEAD GASKET.THAT WILL CAUSE ENGINE OVERHEATING.

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1 Answer

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1 Answer

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2 Inspect Belt Incorrectly routed, adjusted, tensioned, missing, or worn water pump belt(s). grey_line.gif 3 Inspect Oil Pan Gasket - Performance Ruptured, cracked or leaking radiator hose. grey_line.gif 4 Inspect Radiator Cap Worn or damaged radiator cap grey_line.gif 5 Inspect Thermostat Thermostat stuck closed grey_line.gif 6 Inspect Fan Blade Broken, missing, or defective fan blade(s). grey_line.gif 8 Inspect Water Pump Damaged, worn or leaking water pump. grey_line.gif 9 Inspect Intake Manifold Plenum - Perform Leaking water pump gasket. grey_line.gif 10 Inspect Cooling Fan Control Faulty cooling fan control or circuit. grey_line.gif 11 Inspect Cooling Fan Switch - Radiator Faulty radiator cooling fan switch or circuit. grey_line.gif 12 Inspect Engine Temperature Sensor Faulty engine temperature sensor or circuit. grey_line.gif 13 Inspect Temperature Switch Damaged or faulty temperature switch or temperature switch circuit. grey_line.gif 14 Inspect Fan Clutch Worn, loose or faulty fan clutch. grey_line.gif 15 Inspect Ported Vacuum Switch Damaged, leaking, or faulty ported vacuum switch. grey_line.gif 16 Inspect Radiator Obstructed radiator core or radiator cooling fins. grey_line.gif 17 Inspect Head Gasket - Performance Head gasket leaking coolant into cylinders here is a list of things to check Shaun

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