Tip & How-To about GMC C1500

Making a temorary funnel for radiator work

I cut the bottoms off of the large soda bottles to use when refilling automobile radiator systems. The bottle neck fits perfectly in most radiator filler necks.
The bottle has a large capacity to hold the coolant that tends to back up when the engine is running waiting for the thermostat to open and bubbles to release. The back up saves the coolant and saves the messing overflow causes. The bottle last one or two times because the hot coolant softens the bottle. Try it you will like. it. It works on all radiators that fill at the radiator.

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radiator drain plug


The hose coming from the radiator cap neck should be routed into an overflow resevoir.This allows the coolant to escape when the engine is warm,and return to the radiator when it cools off.The radiator cap will bleed off when it reaches the set pressure(typically 16 PSI),and allow the coolant to be sucked back into the radiator by the vaccum created when the engine cools off.If your resevoir is missing or broken,get one at an auto graveyard(it'l probably be about 5 bucks).If you want a $0 fix,you can just put the hose into an empty plastic soda bottle(make sure the hose sits at the bottom of the bottle).

Sep 24, 2012 | 1997 Cadillac Seville

1 Answer

flushing the coolant system


Once the engine has cooled, locate the radiator drain plug and place a large catch pan underneath it. To expedite the draining process, remove your radiator fill cap to allow air to enter the system. With the cooling system refilled with tap water, replace the radiator fill cap and run the engine allowing it to reach operating temperature.drain radiator,
At this point, if you have opted to purchase a radiator flush kit, you should refill the cooling system with tap water and add the caustic fluid as directed.
Run the engine for as long as the radiator flush kit calls for (usually less than 10 minutes). follow directions on bottle for flushing. if you feel you want to use a T connection just cut into return line, from heater core. then you can use a garden hose to flush system.

Nov 08, 2011 | 2002 Chevrolet Malibu

1 Answer

ac problem


the refill bottle shouuld never be attached to the high pressure side (high side) .. the connections are different to prevent that .. if you did manage to hook that up, there would be great danger of the bottle exploding ... so you can only hook the bottle up to the low pressure side (large piple) ... the retrofit kit should have included adapters for both high and low pressure sides ... the correct adaptor should fit the R134a refill bottle hose ... it should also fit the low pressure port (you may have to remove the valve in the old port (read instructions for that) .. if the adapter does not fit then you might check with a dealer or air conditioner supply house for a special adapter ... R134a and R12 are completely incompatable so make sure you have washed out the system and replaced the dryer and sometimes the hoses ... you cant have any of the old lube left in the system .. its generally a good idea to replace all rubber parts for the changeover .. you will need to pull a vacuum for a couple of hours before refilling .. .

Jun 30, 2010 | 1990 Ford Bronco

1 Answer

best way to change coolant in 2003 sierra


With engine cold, remove radiator cap. At bottom of radiator on left side (as you stand in fronof truck), there is a plastic drain plug that screws into the radiator. This plug does not look like a bottle cap, rather it looks like a large, raised tab. Turn counterclockwise to remove. Have a large pan under the truck at this location, or have the truck parked on the grass. Allow to drain completely. Dispose of the old antifreeze and do let children or pets drink it; it is deadly poison. If you want to do this right, replace the plug, refill the radiator with water only, replace the radiator cap, start engine and let run until opwerating temperature is reached (about 20 minutes), then turn engine off, let cool completely, and repeat the drain procedure. This will more thoroughly remove the old antifreeze from the system. Now refill the radiator with the proper mixture of new antifreeze and water, run engine to proper operating temperature. turn off engine and let cool completely. Add additional water and antifreeze into the coolant overflow bottle if necessary. After changing antifreeze, you may need to add more again after couple of days.

Feb 26, 2010 | 2003 GMC Sierra 1500

2 Answers

I have a 2001 Jeep Grand Cherokee Laredo 4WD 6 cly. It has been overheating and I have put a number of parts on it and still haven't figured it out. It is not leaking and fluids either. I have put on a thermostat and a new fan. Also a relay and radiator and ac condenser. What else could it be?


did try replacing the water pump? quick trick get a soda bottle with the mouth big enough to fit and seal in the radiator filler neck fill botle with water set it in place in the radiator neck upside down start engine and look for air bubbles streaming up the water in the sodar bottle if bubbles are present then you have a blown head gasket causing you to over heat

Jul 16, 2009 | 2001 Jeep Grand Cherokee

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