Question about 2003 Pontiac Grand Am
How to bleed the cooling system!
Look on your exhaust manifold. What you are looking for is a little bleed screw. Mine is painted blue. Yours maybe a different color. When you find it start your engine and let it idle for 3-5 minutes. Make sure your heat is turned on full. With the enging running turn bleed screw counterclockwise till water starts shooting out. Let the water continue to shoot out until you get a steady stream. Once you get that steady stream then tighten. Your system is now bled.
Posted on May 11, 2015
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Posted on Jan 02, 2017
If a valve is expose on the upper heater hose piping crack that open only when the engine is warmed up for at least 15 minutes. If no valve is seen you will need to loosen one of the heater hose clamps ever so slowly to let the air out. The process to loosen the clamp is not recommended unless you do this first..... When the engine is COLD loosen a hose clamp and remove the hose and put it back on. Thighten the hose clamp snug only. The start the engine to warm up. In about three minutes see if you can twist the hose to move on the fitting. If you can snug the clamo a lttle more and check again. You do not want the hose to come off if too loose. Now that the engine is warmed up for 10 to 15 minutes shut OFF the engine and barely loosen the same clamp 1/4 turn at a time until coolant trickles out. Listen carefully for air escaping too. Air pressure does built up only when the engine gets hot and the air pocket does not move when the engine was cold with the hose removed beforehand. If no air was released upon this proceedure you have a blockage in your system and flushing maybe the only other option using pressure instead forcing the coolant out. Get a can of coolant flush before the power flush proceedure. A radiator pressure tester can be used to power flush with an air fitting adapter installed in place of the guage
Posted on Mar 28, 2010
Bleeding the Brake System
When any part of the hydraulic system has been disconnected for repair or
replacement, air may get into the lines and cause spongy pedal action (because
air can be compressed and brake fluid cannot). To correct this condition, it is
necessary to bleed the hydraulic system so to be sure all air is purged.
When bleeding the brake system, bleed one brake cylinder at a time, beginning
at the cylinder with the longest hydraulic line (farthest from the master
cylinder) first. ALWAYS Keep the master cylinder reservoir filled with brake
fluid during the bleeding operation. Never use brake fluid that has been drained
from the hydraulic system, no matter how clean it is.
The primary and secondary hydraulic brake systems are separate and are bled
independently. During the bleeding operation, do not allow the reservoir to run
dry. Keep the master cylinder reservoir filled with brake fluid.
fill the master cylinder with brake fluid until the level is within 1/4 I n.
(6mm) of the top edge of the reservoir.
the top of the brake calipers.
end of the hose in a glass jar, submerged in brake fluid.
return slowly. Continue this process to purge all air from the system.
bleeder screw and remove the hose.
after bleeding each wheel.
Posted on Sep 23, 2010
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