Question about 2001 Chevrolet Malibu

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There are 3 hose on the water surge tank. the hose closest to the cap came off an i cant find where it belonged?

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The one just under the cap is a vent hose. If its the one that's about 5 or 6 inches long all together and has a 90 degree bend in it. It just connects to the coolant reservoir and the other end is just open.

Posted on Oct 08, 2010

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02 deville getting air out of cooling system

Remove the cap from the surge tank. Set the heater control temp to max (A/C in any mode EXCEPT max). Start the engine and idle until lower radiator to pump hose is hot. Allow the engine to cool to ambient, and then check/fill the surge tank and replace cap.

Nov 19, 2016 | 2002 Cadillac Deville

1 Answer

After I replace the tensioner elbow and refill coolant, do I need to get air out of the lines?

Yes you do have to burp the system. With radiator cap off (as opposed to the expansion tank reservoir which should also be off) the engine cold and the system almost full, squeeze the top and bottom radiator hoses sharply. Top up fully and replace the two caps. Bring the engine and water coolant to full temperature until the cooling fan kicks in. Wearing gloves, squeeze those hoses again with the engine running. You should feel the water surging. Turn off the engine and leave to cool. Remove the radiator cap and fill the system to the top. Replace the radiator cap. Remove the cap to the reservoir bottle and top that up to the MAX line. Job done and all the air pockets removed.

Jan 17, 2016 | 1996 Oldsmobile 88

1 Answer

Does a blown head gasket cause pressure build up in a surge tank

could be a air pockets in the coolant system that have top bled out
it is a simple exercise to have a compression test done to check for head gasket or cracked head

Mar 14, 2017 | 1999 Cadillac DeVille

1 Answer

How to i flush a radiator on a 2000 expedition and what tools do i need?

you need, knife/ gear clamp,screwdriver /nut driver (for gear clamp) and garden hose
with water pressure hook up hot water is better
you can buy a can or to of rad flush but dishwasher soap works good (it wont suds up )
also rad flush kit with garden hose addapter (most kit are compatable)
1-drain existing coolant in container for recycling
2-locate heater return hose to block and cut to installed flush kit addapter
always better to reveres flussh system with engine off and rad cap removed
drain valve closed hook up garden hose and run hot tap water true system
it will eventually cove out your rad cap (surge tank) until it runs clear
know sut off the garden hose add your cleaning additives installed rad filler cap
run engine per direction on can or 10 to 15 min. sut off engine removed filler cap
open drain valve on radiator and drain out system open water from garden hose
run water until clean water run true shut off garden hose and removed cap off with
cap supplied with kit let system drain completly . repeat cleaning operation until
water runs clear
add 1 jug of concentrated coolant (will mix with ressidual water and finish filling
system with premix used recomended coolant only for your engine your freeze
point of new coolant should be above spec and will be fine
do not used pure concentrated coolant only .your ownners manual spec section will
give capacities system will hold

Apr 03, 2011 | 2000 Ford Expedition

1 Answer

I have a 1999 ford taurus that has coolant coming out of the surge tank, even though the dash temp gauge is a little under the halfway mark. i have replaced the water pump, thermostat, and surge tank fill...

try bleeding the air out of the pipes....the topmost hot water hose is the best one,just undo the clip when hot to expell any air.(wear rubber glves cos its really hot..)

Oct 10, 2010 | 1999 Ford Taurus

2 Answers

Radiator is leaking, on the drivers side of car. 2002 Chevy Avalanche, 4 wheel drive trcuk. One owner, 106000 miles on it.

Removal & Installation To Remove:
To avoid being burned, do not remove the radiator cap or surge tank cap while the engine is on or is still hot. The cooling system will release scalding fluid and steam under pressure if radiator cap or surge tank cap is removed while the engine and radiator are still hot.
If the vehicle's coolant is low, drained out, or has repeatedly needed coolant or water added to the system, then the system should be completely flushed.
  1. Before servicing the vehicle refer to the precautions at the beginning of this section.
  2. Drain the cooling system.
  3. Remove or disconnect the following:
    • Inlet hose from the radiator
    • Radiator outlet hose from the radiator
    • Lower fan shroud
    • Surge tank hose
    • Vent inlet hose from the radiator
    • Surge tank hose
    • Engine oil cooler lines from the radiator
    • Transmission oil cooler lines from the radiator Remove the radiator chevy_sub25_02-04_rad_rem.gif

    • Radiator bolts
    • Radiator from the vehicle
To Install:
  1. Install or connect the following:
    • Radiator to the vehicle
    • Radiator bolts and tighten the bolts, Torque to: 18 ft-lbs (25 Nm)
    • Engine oil cooler lines to the radiator
    • Transmission oil cooler lines to the radiator
    • Radiator vent inlet hose to the radiator
    • Lower fan shroud
    • Outlet hose to the radiator
    • Inlet hose to the radiator
  2. Fill the cooling system.
  3. Test drive the vehicle to confirm the repairs.
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Jul 21, 2010 | 2002 Chevrolet Avalanche

3 Answers

Can a worn out coolant cap cause overheating

There is no radiator cap on the Northstar engine.
The only cap is on the surge tank (or expansion tank) and is pressurized.

So the answer is Yes, a faulty surge tank cap will result in the loss of coolant and therefore lead to overheating.

The most common overheating problem with the Northstar engine is a blocked purge line(small hose).The purge line is designed to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank (not the cap) ,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.
If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.
The hose goes in to the engine to a crossover and comes out the other side close to the thermostat housing,the blockage may be there.

Jul 05, 2010 | 1998 Cadillac DeVille

1 Answer

Just installed rebuilt engine for 2001 chevy 1500 LS v-8 and it is overheating. top hose is hot. repaced the water pump, thermostat, sensor, surge cap, cleaned surge tank. could there be an air lock...

yes it may be, but did you check the radiator for blockage? inside and out side, check to see if there is dirt on the fins. also check the cooling fan operation.
top hose get hot so that meant the thermostat is working ( it's opening ) try to bleed the cooling system again

Jun 03, 2010 | 2001 Chevrolet Silverado 1500

2 Answers

Expansion tank cap is leaking antifreeze from the threads between itself and the tank threads while running and under its own pressure . the cap and tank are brand new and the cap is holding pressure very...

OK, First let's get a couple things straight.
  1. NEW is spelled with an "N"
  2. GOOD is spelled with a "G"
  3. "NEW" and "GOOD" do not mean the same thing - if they did, we would have absolutely no use for the word "WARRANTY" I have seen many people beat their heads against the wall trying to fix a problem and cant figure it out because the part that was causing the problem was "brand new".
  4. It is absolutely impossible to have it both ways. Either the cap is holding pressure very well, or it is leaking.
OK, now that I have my preaching done, I would first have to ask: Are you sure that the cap is on STRAIGHT and screwed all the way down? I have seen a few surge tanks that will actually allow a person to scew the cap on in a tilted position...flimsy plastic junk...

Make sure that the seals in the cap are not damaged. There are two seals, the first is an O-ring that will seal the tank neck just below the overflow hose. The other is a flat seal up in the top of the cap which seals against the top of the threaded area on the surge tank. (This is the one we need to give the most attention to in your case - if the O-Ring is bad it will most likely be dumping all your coolant out the overflow hose.)

If you are satisfied that the cap seals are in good conditon, (They SHOULD look brand new! ;) ) then take a look at the surge tank.

I have seen several plastic surge tanks with "flashing" from the moulding process left on the top edge where the cap seal is supposed to seal. If there is a ridge on the upper surface that you can feel with your fingernail, it is enough to cause a leak. This can be fixed using a block and some 220 grit sandpaper. Be careful not to sand too much and/or sand it to where the top ends up angled. You may want to follow this up with some 1000 grit sandpaper to smooth it out even better.

One final note:
Make sure your surge tank is not overfilled. If it is, it will dump antifreeze untill it reaches the proper level regardless of the condition of the cap and/or surge tank.

Nov 07, 2009 | 1985 Volkswagen Golf

1 Answer

How to replace a water pump on a 2003 yukon

Water Pump Replacement (4.8L, 5.3L and 6.0L Engines)
Removal Procedure
1. Drain the cooling system.
2. Loosen the air cleaner outlet duct clamps at these locations:
 Throttle body
 Mass Airflow/Intake Air Temperature (MAF/IAT) sensor
3. Remove the radiator inlet hose clip from the outlet duct.
4. Remove the air cleaner outlet duct.
5. If necessary, remove the engine sight shield.
6. Remove the radiator vent inlet hose from the radiator hose clips.
7. Reposition the inlet hose clamp at the water pump.
8. Remove the inlet hose from the water pump.
9. Remove the fan blade.
11. Reposition the outlet hose clamp at the water pump.
12. Remove the outlet hose from the water pump.
13. Reposition the surge tank outlet hose clamp at the water pump.
14. Remove the surge tank outlet hose from the water pump.
15. Reposition the heater inlet hose clamp at the water pump.
16. Remove the heater inlet hose from the water pump.
17. Remove the water pump bolts.
18. Remove the water pump and gaskets.
19. Discard the water pump gaskets
Installation Procedure Important: All gaskets surfaces are to be free of oil or other foreign material
during assembly.
1. Install the water pump and NEW gaskets
2. Install the water pump bolts.
3. Install the heater inlet hose to the water pump.
Zoom Sized for Print
Notice: Refer to Fastener Notice in Service and Precautions.
2.1. Tighten the bolts a first pass to 15 Nm (11 ft. lbs.).
2.2. Tighten the bolts a final pass to 30 Nm (22 ft. lbs.).
4. Position the heater inlet hose clamp at the water pump.
5. Install the surge tank outlet hose to the water pump.
6. Position the surge tank outlet hose clamp at the water pump.
7. Install the outlet hose to the water pump.
8. Position the outlet hose clamp at the water pump.
9. Install the accessory drive belt.
10. Install the fan blade.
11. Install the inlet hose to the water pump.
12. Position the inlet hose clamp at the water pump.
13. Install the engine vent inlet hose to the radiator hose clips.
14. If necessary, install the engine sight shield.
Important: Align the arrow at the throttle body end of the duct with the throttle
body attaching stud.
15. Install the air cleaner outlet duct
16. Install the radiator inlet hose clip to the outlet duct.
17. Tighten the air cleaner outlet duct clamps at these locations:
 Throttle body
 MAF/IAT sensor Tighten the clamps to 7 Nm (62 inch lbs.).
18. Fill the cooling system.

I hope this helps. The numbering is incorrect in the sequence but the instructions are correct.


Nov 06, 2009 | 2003 GMC Yukon

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