Question about 1999 Pontiac Grand Am GT

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Water in engine oil - 1999 Pontiac Grand Am GT

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If you have water in the oil you have a cracked head or head gasket is bad

Posted on May 05, 2010

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Engine mixing water and oil in the sump. took the cylinder head and engine block for pressure test. but still mixing what could be wrong. The above was returned as not cracked.


hi there.
Water in the engine - Water can get into your oil sump in two ways: ... Water in the oil- Coolant leak due to non-watertight seal (cylinder head gasket, etc.). If this happens, there is a leak and water is getting into the oil.
Water in engine oil
If you found water in oil car , this water engine car section is for you!
Water in car engine? Water should never be allowed to get into the oil in your engine or gearbox. Otherwise, it will result in significant foaming, dramatically reducing the product's lubrication properties.
Water in the engine - Water can get into your oil sump in two ways:
  • Water in car - Water condensation in cold air or combustion gases: this phenomenon is extremely rare and only occurs at specific temperatures.
  • Water in the oil - Coolant leak due to non-watertight seal (cylinder head gasket, etc.). If this happens, there is a leak and water is getting into the oil.
Water in motor oil can cause serious damage to your engine - the oil will be denatured and no longer effectively cooled.
Contact your repair centre as soon as possible.

Dec 01, 2017 | Cars & Trucks

2 Answers

Why engine oil and water mixed in mazda3


Um, most likely not good. Most likely means the block is cracked allowing the water and oil to mix. Major engine repair.

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May 16, 2016 | Cars & Trucks

1 Answer

How to replace oil; cooler on this year


  • Service and Repair
Oil Cooler Replacement

Removal Procedure

  1. Raise and support the vehicle. Refer to Vehicle Lifting.
  2. Drain the engine oil and remove the oil filter housing.
89116492

  1. Loosen the oil cooler outlet (1) and the inlet (2) lines from the engine block.
  2. Lower the vehicle.
  3. Remove the intake plenum.
  4. Remove the intake manifold.
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  1. Disconnect the following electrical connectors from the water crossover:
    • The engine coolant temperature sender (2)
    • The engine coolant temperature sensor (4)
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  1. Remove the water crossover bolts (1).
  2. Remove the water crossover upper and lower seals (2).
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  1. Loosen the upper heat shield bolts on the left side of the exhaust manifold.
89116496

  1. Remove the oil cooler outlet line from the engine oil cooler.
  2. Remove the oil cooler inlet line from the engine oil cooler.
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  1. Note the positioning of the 4 seals.
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  1. Position the oil feed and return,lines out of the way and secure with mechanic wire.
  2. Remove the engine oil cooler, inlet and outlet nuts (1).
  3. Remove the engine oil cooler cover bolts (2).
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  1. Remove the engine oil cooler cover.
  2. Remove the engine oil cooler.
  3. Clean all sealing surfaces.
Installation Procedure
84972056

  1. Install the engine oil cooler.
  2. Apply a 2 mm (0.08 inch) bead of RTV silicone sealant, GM P/N 12346240, in the groove around the engine oil cooler cover.
  3. Install the engine oil cooler cover.
Notice: Refer to Fastener Notice in Service Precautions.
84972057

  1. Install the engine oil cooler cover bolts (2). Tighten the engine oil cooler cover bolts to 30 Nm (22 ft. lbs.).
  2. Install the engine oil cooler inlet and outlet nuts (1). Tighten the engine oil cooler inlet and outlet nuts to 20 Nm (15 ft. lbs.).
  3. Reposition the oil feed and return lines.
84942883

  1. Install the oil cooler outlet and install the oil cooler inlet lines to the engine oil cooler. Use 4 new seals.
Tighten the oil feed and return lines to 30 Nm (22 ft. lbs.).
84936658

  1. Install the water crossover:
    • Position the crossover.
    • Install the upper and lower seals (2).
    • Install the water crossover bolts (1). Tighten
Tighten the water crossover bolts to 30 Nm (22 ft. lbs.).
  1. Connect the electrical connectors at the following locations:
    • The engine coolant temperature sensor (4)
    • The engine coolant temperature sender (2)
  1. Install the intake manifold.
  2. Install the intake plenum.
  3. Raise the vehicle.
89116492

  1. Install the oil cooler outlet (1) line to the engine block. Tighten the oil cooler outlet (1) line to 30 Nm (22 ft. lbs.).
  2. Install the oil cooler inlet (2) line to the engine block. Tighten the oil cooler inlet (2) line to 30 Nm (22 ft. lbs.).
  3. Install the oil filter housing to the engine block. Tighten the oil filter housing to 45 Nm (33 ft. lbs.).
  4. Lower the vehicle.

Dec 22, 2014 | 2001 Cadillac Catera

1 Answer

Added coolant to resovoir yesterday today its empty where did the coolant go


as you said the expansion tank is running out of water and the engine oil level is getting higher. Question: does your oil become creamy color or not. If is a creamy color means that the water gets into the oil. Now check whether your engine is fitted with an oil cooler by the engine oil filter. if so possible is that, Is mixing the water with the oil, Replace the oil cooler. If not fitted then the things are getting worse.

Either you do have a cracked compression Gasket or a cracked cylinder head,depends to the water temperature you do have,or the engine behaviour.

Aug 28, 2014 | 2003 Pontiac Grand Am

1 Answer

VZ commodore alloytech motor, oil in coolant but no water in oil


Just because you have no water in the oil, you cannot rule out a head gasket issue or a cracked head. Do a bleed-down test.

Aug 14, 2014 | Cars & Trucks

1 Answer

VZ commodore alloytech motor, oil in coolant but no water in oil


It could be a crack or head gasket, when the engine is cold the steel is contracted and there is little water pressure, when you start the engine the oil pressure comes up quick and stays above the coolant pressure, I believe the radiator cap is set at 19-23lbs before it pushes past it. When the block heats up the steel expands and opens the crack or pushes by the head gasket.

Aug 14, 2014 | Cars & Trucks

2 Answers

My problem is toyota 2lt engine oil in water the oil is clean


Check the engine's oil dipstick. Brown, bubbly oil or any inconsistencies or traces of water on the dipstick can be symptoms of a severe head gasket failure. Have the car's engine checked right away. god bless!

Apr 03, 2014 | Cars & Trucks

1 Answer

I have oil in my water resivior and its overflowing with oil.


Sounds like you have a leak that may be due to a bad seal,a bad gasket or a cracked head. When the engine is running. Oil pressure is higher than water pressure. But when the engine is shut off oil pressure goes to zero but water pressure is still at 15 psi. untill the engine cools off. that's when you get water and oil to mix. If you do an oil change you could find water in the oil pan. Doing a water pressure test will verify a leak but won't tell you where.

Nov 23, 2010 | 1999 Cadillac Catera

1 Answer

1999 tahoe 5.7L has a problem. Water mixed with engine oil.


If it was not overheated real bad the intake gaskets are a big problem on those engines

Nov 04, 2009 | Chevrolet Tahoe Cars & Trucks

3 Answers

Nissan Sentra GA14 engine - Water in Engine Oil


If the engine has been flushed well including the radiator and you are still getting water in the oil. The culprit is the cylinder head or the block has a crack internally allowing water into the oil.

Oct 10, 2009 | 1997 Chevrolet Monte Carlo

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