Question about 2002 Pontiac Grand Prix

1 Answer

Upper Engine Seal

Have a feeling that my head gasket is worn out along with my upper engine seal. There is a slight coolant leak coming out of upper seal sometimes and as far as i've noticed its not leaking into the motor. I do not have a loss in heat or problems of that nature, however there is a slight hesitation whenever the car is in drive and you maintain speed, it does not hesitate when you are getting up to speed, could that be due to the gasket and seal being bad?

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  • Pontiac Master
  • 1,150 Answers

3.4 engines are notorious for bad intake manifold gaskets.
if you are going that deep into the engine it is not much more
work to change the head gaskets at the same time, make sure you also replace the head bolts.

Posted on Nov 03, 2012

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Posted on Jan 02, 2017

  • 341 Answers

SOURCE: White smoke coming out of exhaust even when engine is warmed up.

on the 3.8 ussaualy not the head gasket but the upper intake gasket . antifreeze leaks inside intake and into the cylinder. very common. the new gaskets are much thicker.or the plastic plenum the black plastic part on top of the engine goes bad around the water inlet and need to be replaced . when i do either job itell the person to replace both at same time saves money and headaches in the near future. hopes this helps .....and cost for a shop to do this $1100 to $1500

Posted on Dec 08, 2008

csmock132
  • 4669 Answers

SOURCE: COOLANT LEAK

What engine? 3.1? Is this the coolant overflow tank?

Posted on May 16, 2009

  • 121 Answers

SOURCE: engine hesitates or stalls

This might be what we call vapor lock try driving with your gas cap off and see if it still quits under the same conditions.

Posted on Jun 17, 2009

  • 246 Answers

SOURCE: Coolant level sensor pops out

yes. it sounds like your sensor is held in with a retaining clip which looks to have been lost in the swap over from old to new parts. take the car back to the shop that serviced it and tell them about your issue. hopefully not too much damage was caused by the overheating. i hope this helps and good luck!

Posted on Feb 17, 2010

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SOURCE: 2004 Pontiac Grand AM SE1

Any update ? I am having a similar problem... If you have any idea could you email me ? i am on gmail thank you - FutureDCinATL

Posted on May 06, 2012

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1 Answer

What's a major head gasket leak


The head gasket seals the area between the head and engine block. When the seal leaks pressure from the cylinder can leak out and get into the coolant system or just to the outside, depending on the location of the leak. The proper way to fix that issue is to remove the head and install a new gasket along with fixing any other possible issues.

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Why is there no compression in engine on my 1991 mitsubishi pajerno


This has to be because of a mechanical problem in the engine. Possible sources are the timing belt is broken (one indication is the starter spins the engine faster than normal, because the camshaft that opens and closes valves is not turning with the crankshaft), or the head gasket has failed (from overheating as the most likely cause), or badly worn piston rings and/or valves not sealing well (common on high mileage engines).
Compression is built up in the upper part of the cylinder where combustion occurs, so leaks or lost compression are due to valves not sealing, or head gasket that seals the cylinder head to the engine block-sometimes the aluminum cylinder head can warp due to overheating, and the head gasket no longer can maintain a seal. Or also the piston rings are worn so bad that compression will leak past them into the crankcase. For valves or head gasket, the cylinder head has to be removed and repaired. For the rings, the engine has to be rebuilt entirely.
First check if the timing belt is still intact.
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Apr 02, 2014 | 2002 Mitsubishi Galant

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1989 toyota 4x4 pickup, 22re engine, was leaking water out the tail pipe, so am trying head sealer....now when it got low on water the idle would go up and down, up and down. put water in it and it would...


There are no codes need for this they have limited definitions,so lets leave it alone.If you want to sucessfully put a head sealer the direction says to put in radiator. I hope you did use the block sealer just yet. since you replace waterpump and thermostat you can do this, this is the proper way to use block sealer remove the thermostat take some fluid out and pour you block sealer in there. add you coolant or water, and put the thermostat back in.closed the system back up top off the radiator. Not this will be tricky and you ll have to under stand the process or you will waste the block sealer,okay? first because when you are low on coolant this indicates how blown the headgasket is the combustion is coming out to the radiator and with fluid in the radiator the combustion that should go out goes out due to fluid in the radiator okay. block seal in radiator top off. you will use the upper radiator hose as an indicator of how successful you made the repair.start the engine in order for the block seal to work it works and seal because of heat it goes to the hottest part of the leaking area because its hot it solidifies and thus the seal.Start the engine have it rev to 1500RPM feel the upper radiator hose and keep the RPM up. Now when the upper hose feels like it collapse or is soft when squeezed add your coolant or water in the radiator keeping RPM high and dont lower when you open the thermostat it will just shoot out. Now if your repair was sucessfull you upper radiator hose will be solid when it is solid dont open it will shoot out. watch you temp gauge is it close to 200F or kinda in the middle, when it get there shut down the vehicle and dont open the thermostat why because you head is blown and the sealant will just get shot out into the exhaust. so let it seal as it is leaking out and eventually it will seal, now when it get cool open the radiator fill it up, restart feel the upper hose again rev it up to 1500RPM, does it get solid as the engine warms up?if it does you suceeded.If it doesnt you need to repeat or replace headgasket

May 12, 2011 | 1989 Toyota 4Runner

1 Answer

When I start up, a lot of white smoke coming out of the tail pipe. First occurrence was this morning. Is it safe to drive to the car repair shop, or should I have it towed? And what do you think is the...


HI. This will be the cause of coolant consumption that is occurring at this time. I will list the most common culprits below.

Coolant consumption::: Possible causes______


1. Check the head gaskets. The gasket may be leaking, thus allowing coolant to leak into the combustion chambers.

2. Check The Intake Manifold Gasket. This gasket may be leaking, worn, or damaged

3. Check the cylinder head for worn or scorn cylinder block.(This will require total breakdown of the engine)

4. Check the water pump seal for leaks as well.

Now that we have covered the basic check points for coolant consumption, i would advise to concentrate on the head gaskets if there are no apparent leaks on or around the engine itself. If the head gaskets are worn, the leak can be introduced to the engine internally, causing the engine to burn off the coolant. this is noticeable by removing the oil cap, after a hard drive. you Will notice steam that will escape the head as soon as you remove the cap. If this is the case, your problem will be with a failed head gasket.

IN a severe case, you will notice white plums of smoke escaping from the tail pipe during acceleration

Mar 28, 2011 | 1995 Dodge Caravan

3 Answers

Ok. guys. i am losing coolant. it is not showing up in the oil and i have no external leaks. i did replace the head gasket and all associated gaskets about two months ago. also have changed the upper and...


If the coolant is leaking at the head gasket or the intake manifold gasket slowly, then new gaskets will have to be installed. The bubbles coming up is a bad sign that the seal of the coolant system is bad or it's overheating the coolant to the point that it boils over.

The overheating may be due to air or vapor in the cooling system not allowing fluid to flow freely.

Did you put a 50/50 concentration of coolant to water into the cooling system?

Also, check the fan to see if it is turning on when the car is at operating temperature at idle.

May need to be flushed out and new coolant installed to increase cooling efficiency.

Good luck on this repair.

Jan 14, 2011 | 1997 Buick Century

1 Answer

Leaking small coolant fluid


if it is leaking in the frt of engine,right hand side of vehical it could be a coolant pump or the plastic coolat pipe that goes between the lower intake and belt tensionor assembly,if it is leaking from the rear of the engine,left side of vehical,it may be the thermostat housiny seal,upper intake gasket,or upper radiator hose,if it is leaking in the front of vehical,it may be the radiato r cap or radiator,hope this helps you out

Dec 25, 2010 | 2002 Buick Century

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How do i change a thermostat on a 1996 mercury sable and whre is it located


Thermostat-follow the upper radiator thick hose to the thermostatic housing. Removal & Installation 3.0L (2V) To Remove:
  1. Before servicing the vehicle refer to the precautions in the beginning of this section.
  2. Drain the engine cooling system into a suitable container.
  3. Remove the three thermostat housing bolts.
  4. Remove the thermostat O-ring seal.
  5. Inspect and clean the sealing surfaces.
To Install:
  1. Install thermostat and o-ring seal.
  2. Install thermostat housing bolts; torque to 9 lb-ft (12 Nm).
  3. Refill cooling system.
  4. Warm-up vehicle and check for leaks.
  5. Top off cooling system.
3.0L (4V) To Remove:
  1. Drain the engine cooling system.
  2. Disconnect the lower radiator hose from the water inlet adapter.
  3. Remove the bolts, the water outlet adapter and thermostat. Discard the O-ring seal.
To Install:
  1. Clean the sealing surfaces.
  2. Install the thermostat with a new gasket. Tighten the bolts to 89 in-lb (10 Nm).
  3. Refill the cooling system.
  4. Warm-up the vehicle and check for leaks.
  5. Top off the cooling system.
3.4L (SHO) To Remove:
  1. Drain the engine cooling system.
  2. Remove battery.
  3. Remove power distribution box.
  4. Remove battery tray.
  5. Disconnect upper radiator hose and place it out of the way.
  6. Disconnect the lower radiator hose from the water inlet connection.
  7. Remove the two mounting bolts and remove the water inlet connection.
  8. Remove the O-ring seal and thermostat from the water pump.
  9. Inspect O-ring for damage and replace if necessary.
To Install:
  1. If necessary, install a new O-ring on the inlet connection.
  2. Install the thermostat in the water pump and install the inlet housing. Tighten the bolts to 71-106 lb-in (8-12 Nm).
  3. Connect the lower radiator hose to the water inlet connection.
  4. Install the upper radiator hose.
  5. Install battery tray.
  6. Install the power distribution box.
  7. Install the battery.
  8. Refill the engine with coolant.
  9. Start the engine and allow the engine to warm up so that the water thermostat opens. Check for leaks.
  10. Stop the engine. Allow the engine to cool and top off degas bottle as required to maintain minimum cold fill level.
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Aug 03, 2010 | 1996 Mercury Sable

2 Answers

ANTIFREEZE DISAPPEARING - NO VISIBLE LEAKS


HI. This issue has many causes. i will list the most common causes below.

Coolant consumption::: Possible causes______


1. Check the head gaskets. The gasket may be leaking.
2. Check The Intake Manifold Gasket. This gasket may be leaking, worn, or damaged
3. Check the cylinder head for worn or scorn cylinder block.(This will require total breakdown of the engine)

4. Check the water pump seal for leaks as well.

Now that we have covered the basic check points for coolant consumption, i would advise to concentrate on the head gaskets if there are no apparent leaks on or around the engine itself. If the head gaskets are worn, the leak can be introduced to the engine internally, causing the engine to burn off the coolant. this is noticeable by removing the oil cap, after a hard drive. you Will notice steam that will escape the head as soon as you remove the cap. If this is the case, your problem will be with a failed head gasket.

IN a severe case, you will notice white plums of smoke escaping from the tail pipe during acceleration.

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2 Answers

I'm needing to add coolant frequently, what may be the issue?


With a vehicle that old, it's either a blown head gasket, or leaky coolant hoses.

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Coolant consuption on vw passat tdi 2005


has it been pressure tested? do u have any coolant stains uinder the car maybe from the water pump area?

Sep 12, 2009 | 2005 Volkswagen Passat

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