Question about 1996 Chevrolet Cavalier

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Leaking hose in front of engine

Cant figure out what the hose is called, its a molded pipe coming from the water pump in the front of the engine

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  • Chevrolet Master
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That molded pipe is the warer pump bypass tube. and should be replace. Unfortunately it reqiures water pump removal.. Hace it confirmed tha it is the source of leakage and get er done
Ned

Posted on Jun 25, 2009

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  • Master
  • 1,341 Answers

This means you have a leak on your cooling system.Be very careful with that as if you are not careful it will end up blowing the head gasket which will be costly to fix.My suggestion is to find the leak, drain the cooling system and fix the leak which will be less costly and easier than having a replacement head gasket.

Posted on Jun 25, 2009

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2 Answers

My 2001 Terracan highlander has coolant leaking under the engine.Can someone tell me where the leak is coming from and how to fix it? The car has a v6 3.5l engine.


Could be welsh plugs on side of engine are corroded.
Could be a smaller pipe like a heater hose pipe or an auxilary cooling pipe .Had one of these little extra pipes on a mitsubishi sigma under the inlet manifold that was leaking.
Did you use a coolant in the engine as water can corrode welsh plugs in engines as I found out on my car !.

Jun 11, 2016 | Cars & Trucks

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87 ford ranger coolant leak not from water pump replaced it today appears to be coming from right behind it


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Dec 27, 2012 | 1987 Ford Ranger

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My 2003 Mitsubishi galant is leaking water and it's coming from a pipe that is connecting to the water pump


I have the same problem (01 Galant) replaced the water pump, radiator, thermostat housing, the hose, its the pipe under the car(near drivers seat) , going from the water pump to the thermo housing > What is that pipe called? anyone?

Aug 29, 2012 | Mitsubishi Galant Cars & Trucks

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Need to know where the thermostadt is at. Have leakage but can't find any hoses etc leaking.


If you have the V6 (2.5L) engine, be advised: it's a wearing task. Just getting to the radiator drain plug can be a problem without a 3/8 inch drive ratchet, a 3 inch extension, a universal joint. and a 19 mm socket. The drain plug is on the passenger side of the radiator on the engine side. The 19mm socket will fit over the drain plug to turn it open.
The coolant plumbing on this engine is the craziest I have ever seen. The thermostat is on the rear face of the engine (where the radiator hoses connect), but not on the upper hose where it connects to the upright pipe with the radiator cap on it, it is on the lower hose connection. Pull that hose off the housing, and remove the three bolts holding the thermostat housing to the engine. It will help if you first remove the big air inlet hose from the air filter housing to the throttle body. I wouldn't even bother with the thermostat till you have found the leak. Is any coolant leaking from the front of the engine, dripping off the bottom behind the crank pulley? That would be a water pump problem or SEAL, an o-ring on the back of the water pump. Now get on the driver's side and look around on the rear of engine nearest the firewall where engine and transaxle mate. Look down there for signs of coolant coming from rear of engine and running down onto the transaxle case. There is a metal pipe laying in the valley below the lower intake manifold, connecting the water pump at the front and the rear housing where the radiator hoses and heater hoses connect. This metal pipe uses an o-ring for a seal into the water pump, and the same size o-ring to connect to the rear housing. If one of those o-rings is leaking, you have a big problem getting to it.. I took the rear housing off once (never again!), Now I'm taking the water pump off to fix a leak. The water pump is run by the timing belt, so the front of engine needs to be stripped down, and the timing belt removed to take off the water pump. That metal pipe is held in place by a bracket with one bolt on the rear of engine; it may require taking the lower intake off (again) to get to both of those pesky o-rings. I hope you don't have the same problem, and if you have the 4 cylinder engine, the thermostat is a snap to replace, plus you don't have that crazy plumbing problem.

Apr 01, 2012 | 1997 Chrysler Sebring

2 Answers

I have a leak and cannot find where it is coming from!? Could it be coming from the water pump?


Yes its likely most water pumps have a small hole on the under side of them called a weep hole. Its there to let you know that the seal is starting to leak and the pump needs to be replaced before it completely fails say on the highway and dose a lot of damage to the engine If its coming out the bottom center of the pump shaft and just driping a little then its time to replace the pump you should be able to feel the hole with your finger

Jan 11, 2011 | 1996 Mazda 626

1 Answer

I am seeing water behind the pump on the top of the motor in the v under all the fuel injection / intake is that normal for water pump to leak there if its bad?


its not normal. the water pump will leak in front, not back. There is a pipe and hose down in the VEE that can leak. If the pipe is bad, you will need to remove the pump to replace it. The intake manifold will need to come off, to replace the pipe/ hose. the hose connects a pipe behind the water pump to a pipe at the rear of the block to a heater hose.

Dec 12, 2010 | 2000 Ford Expedition

1 Answer

How to replace water pump 2003 alero. 3400 engine.


Removal & Installation 2.2L Engine To Remove:
  1. Disconnect the battery ground cable.
  2. If equipped with an automatic transmission, remove the exhaust manifold..
  3. Drain the cooling system.
  4. Raise and safely support the vehicle.
  5. Remove or disconnect the following:
    • Right front wheel and tire assembly.
    • Right front fender liner. chevy_cav_02-04_accescover.gif

    • Access plate on the water pump sprocket from the timing cover.
  6. Install J 43651 water pump sprocket holder or equivalent to the water pump sprocket.
  7. Use the access plate bolts to attach J43651 to the engine front cover.
  8. Remove or disconnect the following:
    • Bolts that secure the sprocket to the water pump.
    • Bolt that secures the engine block to the water pump.
    • Bolt that secures the engine front cover to the water pump.
    • Feed pipe that joins the thermostat housing to the water pump. chevy_cav_02-04_wp.gif

    • 2 Bolts that secure the water pump to the engine block.
    • Water pump.
To Install:
  1. Use a threaded stud in the hub to align the water pump sprocket.
  2. Install or connect the following:
    • Water pump.
    • 2 bolts that secure the water pump to the engine block.
    • Feed pipe that joins the thermostat housing to the water pump.
    • Front cover bolt and the bolt that secures the engine block to the water pump. Tighten the bolts to 15 ft lbs (20 Nm).
    • 2 of the bolts that secure the water pump sprocket to the water pump.
  3. Remove the threaded stud.
  4. Install the last bolt.
    • Tighten the bolts to 89 in lbs (10 Nm).
  5. Remove J 43651.
  6. Install the access plate on the water pump sprocket to the timing cover.
  7. Install the access plate bolts.
    • Tighten the bolts to 18 in lbs (10 Nm).
  8. Install the front fender liner.
  9. Install the right front tire and wheel.
  10. If equipped with an automatic transmission, install the exhaust manifold.
  11. Fill the cooling system.
  12. Connect the battery ground cable.
2.4L Engine To Remove:
Water pump 2.4L 87953070.gif

  1. Disconnect the negative battery cable
  2. Drain the engine coolant.
  3. Remove the exhaust manifold.
  4. Remove the coolant intake pipe as follows:
    1. Remove the coolant inlet pipe bolts.
    2. Remove the wheel and tire assembly.
    3. Remove the engine splash shield.
    4. Remove the bolts from the transaxle-to-engine block brace and remove the brace.
    5. Remove the radiator hose from the coolant inlet pipe.
    6. Remove the coolant inlet pipe to oil pan bolt.
    7. Remove the coolant inlet pipe, thermostat and seal.
  5. Lower the vehicle.
  6. Disconnect the heater hose quick connect from the heater outlet pipe.
  7. Remove the front timing chain cover and the chain tensioner.
  8. Unfasten the water pump-to-cylinder block bolts.
  9. Remove the water pump-to-timing chain housing nuts.
  10. Remove the water pump and cover mounting bolts and nuts.
  11. Remove the water pump and cover as an assembly. Separate the two pieces after removal.
  12. Clean the mating surfaces.
To Install:
  1. Install the water pump cover to the water pump assembly.
  2. Install and hand tighten the pump cover mounting bolts.
  3. Install water pump cover assembly.
  4. Install and hand tighten the cover-to-block mounting bolts.
  5. Install and hand tighten the water pump-to-timing chain housing nuts.
    • Tighten the water pump-to-timing chain housing mounting nuts to 19 ft lb (26 Nm).
    • Tighten the water pump cover-to-water pump mounting bolts to 124 in lb (14 Nm).
    • Tighten the water pump cover-to-engine block bolts starting with the bottom bolt first to 19 ft lb (26 Nm).
  6. Install the heater hose to the water pump pipe.
  7. Using new gaskets, install the exhaust manifold.
  8. Install the oil level indicator and tube.
  9. Connect the brake vacuum tube to the cam housing.
  10. Raise and safely support the vehicle.
  11. Install the catalytic converter.
  12. Install the coolant inlet pipe.
    • Tighten the inlet pipe-to-oil pan bolt to 19 ft lb (26 Nm). Tighten the coolant inlet pipe bolt to 124 in lb (14 Nm).
  13. Install the timing chain and tensioner.
  14. Lower the vehicle.
  15. Connect the oxygen sensor.
  16. Fill cooling system and check the system for leaks.
3.4L Engine To Remove:
  1. Disconnect the battery ground cable.
  2. Drain the cooling system.
  3. Loosen the water pump pulley bolts.
  4. Remove or disconnect the following:
    • Drive belt.
    • Water pump pulley bolts and pulley.
    • Water pump bolts, pump and gasket.
    • Clean the water pump mating surfaces.
To Install:
  1. Install or connect the following:
    • Water pump gasket and pump.
    • Water pump bolts.
      1. Tighten the water pump bolts to 89 in lbs (10 Nm).
    • Water pump pulley and bolt until snug.
    • Drive belt.
  2. Tighten the water pump pulley bolts to 18 ft. lbs (25 Nm).
  3. Fill the cooling system.
  4. Check for leaks.
  5. Connect the battery ground cable.
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Aug 31, 2010 | 2003 Oldsmobile Alero

3 Answers

Coolant is leaking from hose/pipe under coolant reservoir


It sounds like the outlet pipe from rear of water pump,which takes the hose from the rear plastic pipe, which is very common problem in Daewoo Leganza/Nubira/Lanos Australian 2.0/2.2 DOHC engines.Either the hose itself, the plastic pipe, or the alloy outlet for the hose on rear of water pump, which is subject to corrosion.You will have to confirm where leak is from, if it is from hose to rear of water pump, you can try re-clamping hose or replacing hose, if it is corrosion of that outlet,the part is available @$40-60 new, but it is a fairly major job because timing cover timing belt and then water pump must be removed...it is a difficult workspace in front of and behind that engine,the manifold and alternator are both in the way , it may be possible to do it in car but you may even be better off removing engine to work on.Good news is that this is a great opportunity to replace T-belt and water pump and pulleys at the same time..Sorry its not that great a news, its not a very easy DIY job, but it is do-able if you have some experience and tools.

Apr 06, 2010 | 2001 Daewoo Leganza

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