May 132019
 

Pontiac Firebird

The engine is over heating and the mechanics don’t know why. New heads, water pump, thermostat and sensors, etc. Over heats almost immediately. We are all stumped and need help. Thank you. 305 engine 5.0L.



Couple of possible things to look at.

  • Thermostat in backwards
  • Using just water instead of 50/50 mix
  • Low on coolant and or air pocket
  • No fan or fan shroud missing
  • Blocked of clogged radiator
  • Incorrect head gasket causing coolant passages to be blocked
  • Ignition timing
  • Faulty gauge reading (use an external infrared temperature gun)

Feb 282019
 

looking for reman engine. 1st gen with engine oil cooler.
cannot find one with the cooler.
mechanic says we can use a reman engine without the cooler and just run a bypass around the connections.
Is this advisable?


If a 1st gen Remanufactured Engine is what you want, I would advise continuing to look for it. Have you called Jasper Engines? If they do not have one in stock, they can and will use your engine and  re-manufacture it. They will even warranty the labor if installed by a qualified installer.

Jan 202019
 

Pontiac Grand Prix

Transmission Problem

Description of Problem: I took my 2007 Pontiac Grand Prix to a machanic in Greenville, Texas. It took him about 1 month to have it so called fixed, I drove it home and it seemed fine. It sat for maybe 2 weeks to get the money to have it tagged and inspected.
Well it started slipping again, check the fluid and it’s OK. No leaks, return it back to machanic and he says after having it 2weeks thru the holidays that he would check the filter which I don’t understand why a new wasn’t put on at time of repair.
Anyway while driving sometimes it it won’t shift, and then sometimes it won’t go into gear at all. I have to pull over shut it off and sit a second, then restart it to get it to go.
Any suggestions??? Help please


A clogged transmission filter or faulty transmission solenoid would be my first guess.

Jan 272018
 

2006 Pontiac Grand Prix

How to remove dash to repair radio?


Radio Removal – Short Answer

  • Remove the instrument panel (I/P) accessory trim plate. Refer to Instrument Panel Trim Plate Replacement – below
  • Remove the I/P center compartment.
  • Remove the HVAC control assembly. Refer to HVAC Control Assembly Replacement – below
  • Remove the radio screws.
  • Pull the radio toward you.
  • Disconnect the I/P wiring harness connectors and the antenna cable connector from the radio.
  • Remove the radio.

Instrument Panel Trim Plate Replacement

2006-pontiac-grand-prix-instrument-panel-trim-plate-replacement

HVAC Control Assembly Replacement

2006-pontiac-grand-prix-hvac-control-module-replacement
Dec 272017
 

Pontiac Grand Prix

I put windshield washer fluid in my coolant tank. Is it safe to drive and is it a big deal? I put a gallon in.


Washer Fluid in Coolant

No. It is not safe to drive the vehicle this way. The engine is capable of overheating. Internal engine damage may occur.

You may be able to drain or suck out the the contaminated coolant. This is if you haven’t started the engine and only filled the reservoir. Disconnect the tank, drain it and put fresh coolant in it. No worries. Washer fluid is basically 95% water, 4% alcohol, .5% soap, and a .5% surfactant. The alcohol will evaporate. The surfactant and soap does not amount to much and there is water in your fluid already.

Coolant Flushing

DO NOT USE A CHEMICAL FLUSH

When the cooling system becomes contaminated, the cooling system should be flushed thoroughly to remove the contaminants before the engine is seriously damaged.

  • Drain the cooling system.
  • Remove the coolant recovery reservoir
  • Clean and flush the coolant recovery reservoir with clean, drinkable water.
  • Install the coolant recovery reservoir.
  • Follow the drain and fill procedure using only clean, drinkable water.
  • Run the engine for 20 minutes.
  • Stop the engine.
  • Drain the cooling system.
  • Repeat the procedure if necessary, until the fluid is nearly colorless.
  • Fill the cooling system.

 

Nov 242017
 

2010 Pontiac G6

I put a new (used) motor in my 2010 Pontiac G6. And when you turn the car on the backup lights come on and stay on.All the lights on the dash work. But when you go to start it nothing happens. It won’t click it, won’t do anything. I figured it’s something to do with the security system but the security light goes off as soon as you turn the key on so I’m stuck.


We have developed a Flow Chart for diagnosing no start situations. Take a look. I will ad a wiring diagram of the starting system to help assist with this issue. Check your battery connections, then your starter fuse #26.

Starting Circuit Wiring Diagram – 2010 Pontiac G6

(best viewed in Google Chrome or Firefox)
2010-pontiac-g6-starting-circuit

Nov 062017
 

1986 Pontiac 6000

Heater fan only works on low or cold but not high. It is a 1986 Pontiac 6000 SE.


Heater fan only works on low

This is a classic description of a failed blower motor resistor. Replacing the blower motor resistor will solve the problem.

Labor time to replace the blower motor resistor is 0.3 hours. So it doesn’t take long at all to fix it yourself. So look at the top of the firewall on the passenger side. You’ll see the electrical connector there. Unplug the connector and remove the two screws. Pull upward on the resistor and replace in reverse order.

Blower motor resistor replacement

  • Disconnect the negative battery cable.
  • Unplug the electrical connector at the resistor.

blower motor resistor electrical connector

  • Remove the resistor attaching screws(2).

blower motor resistor 1986 Pontiac 6000

  • Remove the resistor from the evaporator case.

 

 

Oct 242017
 

Pontiac Torrent

Loud whining sound

Loud whining sound seems to coming from the back of my car. Start hearing it at about 30mph up to about 60mph. It may be at higher speeds too, not sure if it’s road noise covering it or that it’s not as loud. Best description is like when Honda civics are retrofitted with a muffler that makes a really annoying high pitch sound. Only mine is heard in the car. Not sure if it’s heard outside car. Thank you


Oct 212017
 

2003 Pontiac Grand Prix

Water doesn’t appear to be running through hoses from heater core to radiator.


If the coolant system is low or has been recently worked on there may be an air pocket in the system. The cooling system requires a special bleeding procedure to remove all air from the system. If the system is full and bled properly then the water pump may be faulty if the heater core is not clogged.

Checking to see if the heater core is clogged would require disconnecting the hoses. Using a water hose fixed to one side and see if water flows out the other side.

There is one bleed valve on the 3800 engine. It is located on the thermostat housing.

Bleed valve coolant 2003 Pontiac Grand Prix

Cooling Cycle

Coolant flows from the radiator outlet and into the water pump inlet. Some coolant flows from the water pump, to the heater core, then back to the water pump. This provides the passenger compartment with heat and defrost capability as the coolant warms up.

Coolant also flows from the water pump outlet and into the engine block. In the engine block, the coolant circulates through the water jackets surrounding the cylinders where it absorbs heat.

The coolant then flows through the cylinder head gasket openings and into the cylinder heads. In the cylinder heads, the coolant flows through the water jackets surrounding the combustion chambers and valve seats, where it absorbs additional heat.

Coolant is also directed to the throttle body. There it circulates through passages in the casting. During initial start up, the coolant assists in warming the throttle body.

From the cylinder heads, the coolant flows to the thermostat. The flow of coolant will either be stopped at the thermostat until the engine reaches normal operating temperature, or it will flow through the thermostat and into the radiator where it is cooled. At this point, the coolant flow cycle is completed.

Efficient operation of the cooling system requires proper functioning of all cooling system components. The cooling system consists of the following components.

Water Pump

The water pump is a centrifugal vane impeller type pump. The pump consists of a housing with coolant inlet and outlet passages and an impeller. The impeller is mounted on the pump shaft and consists of a series of flat or curved blades or vanes on a flat plate. When the impeller rotates, the coolant between the vanes is thrown outward by centrifugal force.

The impeller shaft is supported by one or more sealed bearings. The sealed bearings never need to be lubricated. Grease cannot leak out, dirt and water cannot get in as long as the seal is not damaged or worn.

The purpose of the water pump is to circulate coolant throughout the cooling system. The water pump is driven by the crankshaft via the drive belt.

Oct 162017
 

Pontiac Grand Am

Description of Problem: I have a 2000 Pontiac Grand Am and just replaced the ignition switch. I did the passkey lock and everything with no problem. But the ignition only will start to the side not mounted in the dash where its supposed to be and I cant put my radio back in.


Not sure what you did or didn’t do. Best advice would be to go back over your work. You may want to take it all back apart and start from scratch to make sure no steps were missed. Check you connections.

Ignition and Start Switch Replacement Pontiac

(best viewed in Google Chrome or Firefox)
2000-pontiac-grand-am-ignition-and-start-switch-replacement-pontiac

Important
You must perform the BCM theft deterrent relearn procedure after replacement of the ignition switch lock cylinder.