Question about 1997 Pontiac Bonneville

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1997 pontiac bonneville put in new intake manifold gasket car runs great but can not get any heat is ther a simple way to bleed system?

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Try flushing out the heater core.

Posted on Nov 11, 2010

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1 Answer

How to bleed coolant system


I have caps that fit the tanks that will allow pressure to vent thru the overflow tank.
Sometimes you can run the engine with the cap off and keep filling too.

Jul 01, 2012 | 1998 Pontiac Grand Prix

1 Answer

Where is the thermostat located on a 91 Bonneville 3.8 liter engine? The engine overheats when stopped and the fans do not engage. I suspect the control thermostat but cannot locate it on the engine


THE CHEVY 3.8 A GOOD ENGINE BUT YOU CAN;T LET THEM OVER HEAT EVEN ONCE THE INTAKE MANIFOLD IS ALUMINUM AND TENDS TO WHORP CAUSING THE HEAD GASKETS TO LEAK IN TO THE CYLINDERS ANTIFREEZE YOUR T STAT IS LOCATED ON TOP OF ENGINE LOOK AT TOP HOSE ON RADITOR FOLLOW IT BACK TO THE OTHER HOSE CLAMP ON THE HOSE THATS WHERE IT IS ALTHOUGH YOU PROBELLY NEED A NEW RADITOR AND A COMPLETE FLUSH OF THE SYSTEM YOU MAY WANT TO THINK OF GETTING RID OF IT WHILE IT STILL IS RUNNING SORRY HOPE IM WRONG BUT YOUR T STAT IS NOT THE OLNY PROBLEM GOOD LUCK

Oct 12, 2010 | 1991 Pontiac Bonneville

1 Answer

Need to replace intake manifold how do you do this


Bonneville, LeSabre, Park Avenue 2000-2005 Intake Manifold - Removal & Installation

3.8L Engine
VIN 1 Engine
  1. Before servicing the vehicle, refer to the Precautions section.
  2. Relieve the fuel system pressure.
  3. Drain the cooling system.
  4. Remove or disconnect the following:
    Negative battery cable Supercharger Thermostat housing Exhaust Gas Recirculation (EGR) tube at the intake manifold Engine Control Temperature (ECT) sensor Intake manifold
To install:
  1. Install or connect the following:
    Intake manifold with new gaskets. Torque the bolts, working from the center out, to 11 ft. lbs. (15 Nm). ECT sensor connector EGR tube to the intake manifold Thermostat housing Supercharger Negative battery cable
  2. Refill and bleed the cooling system.
  3. Run the engine and check for leaks and proper engine operation.

VIN K Engine
  1. Before servicing the vehicle, refer to the Precautions section.
  2. Disconnect the negative battery cable.
  3. Drain the cooling system.
  4. Relieve the fuel system pressure.
  5. Remove or disconnect the following:
    Fuel injector sight shield Air inlet duct Spark plug wires from the right side Manifold Absolute Pressure (MAP) sensor Vacuum lines from the intake manifold Fuel lines Fuel injector electrical connectors Fuel regulator vacuum line Fuel rail from the intake manifold Exhaust Gas Recirculation (EGR) heat shield Throttle cable bracket from the cylinder head mounting bracket and the throttle body cables Throttle body support bracket Upper intake plenum and gasket Thermostat housing Electrical connector from the Engine Coolant Temperature (ECT) sensor Drive belt tensioner assembly EGR valve outlet pipe Lower intake manifold

    a5adffa.jpg
    Fig. Exploded view of the intake manifold and related components-3.8L (VIN K) engine
To install:


140d431.jpg
Fig. Upper intake manifold torque sequence-3.8L (VIN K) engine


4950e4f.jpg
Fig. Lower intake manifold torque sequence-3.8L (VIN K) engine
  1. Install or connect the following:
    Intake manifold using new manifold gaskets. Torque the bolts in sequence to 11 ft. lbs. (15 Nm); then, re-torque to 11 ft. lbs. (15 Nm). EGR valve outlet pipe Drive belt tensioner assembly. Torque the tensioner bolts to 37 ft. lbs. (50 Nm). Electrical connector to the ECT sensor Thermostat housing Upper intake plenum. Torque the intake plenum bolts to 88 inch. lbs. (10 Nm). Throttle body support bracket Throttle cable bracket to the cylinder head mounting bracket and the cables to the throttle body lever EGR heat shield Fuel rail. Torque the fuel rail bolts to 88 inch. lbs. (10 Nm). Fuel lines Fuel regulator vacuum line Fuel injector electrical connectors Vacuum lines to the intake manifold MAP sensor Spark plug wires Fuel injector sight shield and air inlet duct Negative battery cable
  2. Refill and bleed the cooling system.
  3. Run the engine and check for leaks and proper engine operation.

Hope this help (remember rated this).

May 17, 2010 | 2001 Pontiac Bonneville

1 Answer

My car has an overheating problem.... ive put in a new thermostat and flushed the system and added new coolant but still over heats even with the heater on full blast


Could be the waterpump has a leak. Could be a clogged/blocked radiator. Could be the LIM (Lower Intake Manifold) gasket - a problem that is chronic with GM cars esp 3.1 and 3.4L engines. Could be an air bubble in the system if you didn't bleed it. Could be that you bought a bad thermostat - just because it's new, doesn't mean you got a good one.
Your symptoms could be any of the above. When I had your problem it was the LIM. Check for water in your oil.

Mar 27, 2010 | 2004 Pontiac Grand Prix

2 Answers

Pontiac bonneville 3.8 vin code k . I replaced the in take gasket because it was leaking water between the top an bottom intakes going into the cyclinder heads its still leaking after all this work ive...


This is the entire task for it. It sounds like you might not have torqued it correctly, or your intake is cracked. But take a look at all of the info:

VIN K Engine On these engines, the upper and lower intake manifolds must be removed separately.
  1. Properly relieve the fuel system pressure, as outlined in Section 5 of this manual.
  2. Disconnect the negative battery cable.
  3. Drain the cooling system into a suitable container.
  4. Remove the fuel injector sight shield and air intake duct.
  5. Tag and disconnect the spark plug wires on the right side of the engine and position aside.
  6. Remove the manifold vacuum source.
  7. Remove the fuel rail.
  8. Remove the EGR heat shield.
  9. Unfasten the cable bracket-to-cylinder head mounting bolt.
  10. Disconnect the throttle cable.
  11. Remove the throttle body support bracket.
  12. Unfasten the upper intake manifold bolts, then remove the upper manifold.
This engine has two bolts which are hidden beneath the upper intake. These bolts are located in the right front and left rear corners of the lower intake manifold. This is why it is necessary to remove the upper before servicing the lower manifold.
  1. Disconnect the upper radiator hose.
  2. Remove the alternator, as outlined in Section 2 of this manual.
  3. Remove the drive belt tensioner.
  4. Remove the EGR valve outlet pipe.
  5. Unfasten the intake manifold bolt, then remove the manifold from the vehicle. Remove and discard the gaskets. Thoroughly clean the gasket mating surfaces, intake manifold bolts and bolt holes.
To install:
  1. Position a new gasket, then place the lower intake manifold over it. Apply a suitable threadlocking compound to the bolts, then install them. For 1995 vehicles, tighten the bolts twice, to 88 inch lbs. (10 Nm), in the sequence shown in the accompanying figure. For 1996-97 vehicles, tighten the bolts to 11 ft. lbs. (15 Nm), in the sequence shown in the accompanying figure.
    1. Install the EGR valve outlet pipe.
    2. Install the drive belt tensioner.
    3. Install the alternator.
    4. Connect the upper radiator hose.
    5. Position the upper intake manifold on the lower manifold. Install the retaining bolts and tighten to 89 inch lbs. (10 Nm).
    6. Install the throttle body support bracket, then connect the throttle cable.
    7. Install the cable bracket-to-cylinder head mounting bolt.
    8. Install the EGR heat shield.
    9. Install the fuel rail.
    10. Install the manifold vacuum source.
    11. Connect the right side spark wires on the right side of the engine.
    12. Install the fuel injector sight shield and air intake duct.
    13. Fill the cooling system with the proper type and amount of fluid.
    14. Connect the negative battery cable. Start the engine and check for leaks. Check the cooling system, and add as necessary.

Oct 18, 2009 | 1995 Pontiac Bonneville

3 Answers

99 GrandAm still overheating after replacing comon problem parts.


did you bleed the air from the system? how do u know u don't have a leaking head gasket, have u had it checked with a gas analyzer?

Sep 29, 2009 | 1999 Pontiac Grand Am GT

1 Answer

Bonn. super charge intake manifold gasket help please


head or block maybe cracked,headgasket bad,,get a dif. mechanic for a second opinion.

Feb 22, 2009 | 1995 Pontiac Bonneville

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