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Bronco Burp?

5546 Views 8 Replies 6 Participants Last post by  miesk5
Sometimes when I come to a stop after normal driving conditions or when I turn off the truck I hear bubbling and flowing water (coolant). I have been using the heater recently too and with more coolant flowing around I hear more gargling and bubbling water sounds. I did the coolant flush myself 4 months ago and the fluid level was correct, or so I believed. Obviously it has air in the system, should I burp the 351w? add more coolant?

Any thoughts or ideas are appreciated.



:rockon
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Burp first, then add coolant. Also check for leaks...
Just because you are using the heater more does not mean more coolant is flowing, it goes through the heater core all the time unless yours has some bypass.
Cool, so how do you 'burp' the motor? Run it with the rad cap off? not sure.

Thanks in advance
Thanks to the Search feature I found


This

Thanks JOE'BRONCO

Its easy to do and all you need is engine coolant and common sense

1) Start with a cold system - DO NOT DO THIS ON A WARMED UP TRUCK

2) Open Radiator cap and fill system

3) Fill your reservoir

4) With the Radiator cap still OFF the radiator start your engine

NOTE: DO NOT REV YOUR ENGINE
this will force coolant out the open radiator and spill everywhere.

5)Turn on your heater to MAX DEFROST

6) You will want to run the engine until warms up and kicks off of high idle and then a few minutes after that (or until operating temp)

Keep and eye on your thermostat to make sure it doesn't overheat. An overheated engine can warp your heads blow out a gasket ect. ect.



* IF you notice bubbling out of the top of your radiator then you may have air in the system. This is normal, it just the air tiring to escape and pushing the coolant up. Keep the truck running unless the bubbling is excessive.



7) Once your engine hits the running temp turn it off and let it cool.

8) If your coolant level dropped, that means you've displaced some of the air in your system. Refill it and repeat the process.

9) Drink a beer

10) Repeat as necessary
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excellent, thank you
yo, good stuff!
I have this stuff in my site to add;

Draining, Filling and Bleeding in 96 Bronco & F Series from Workshop Manual
Source: by Ford
"...WARNING: DO NOT STAND IN LINE WITH OR NEAR ENGINE COOLING FAN BLADE (8600) WHEN ENGINE (6007) IS RUNNING.
WARNING: NEVER REMOVE THE RADIATOR CAP (8100) UNDER ANY CONDITIONS WHILE THE ENGINE IS OPERATING. FAILURE TO FOLLOW THESE INSTRUCTIONS COULD RESULT IN DAMAGE TO THE COOLING SYSTEM OR ENGINE OR PERSONAL INJURY. TO AVOID HAVING SCALDING HOT COOLANT OR STEAM BLOW OUT OF THE RADIATOR (8005), USE EXTREME CARE WHEN REMOVING THE RADIATOR CAP FROM A HOT RADIATOR. WAIT UNTIL THE ENGINE HAS COOLED, THEN WRAP A THICK CLOTH AROUND THE RADIATOR CAP AND TURN IT SLOWLY TO THE FIRST STOP. STEP BACK WHILE THE PRESSURE IS RELEASED FROM THE COOLING SYSTEM. WHEN YOU ARE SURE ALL THE PRESSURE HAS BEEN RELEASED, PRESS DOWN ON THE RADIATOR CAP (STILL WITH A CLOTH), TURN AND REMOVE IT.
To prevent loss of coolant when draining the radiator, attach a hose on the radiator draincock (8115) and drain the coolant from the radiator into a clean container.
To drain the radiator, open the radiator draincock located at the bottom of the radiator and remove the radiator cap or supply tank cap. The cylinder block of the V-8 engine is drained by removing the drain plugs located on both sides of the cylinder block (6010). The six-cylinder engines have one drain plug located at the right rear of the cylinder block.
If replacing coolant, dispose of old coolant in accordance with applicable federal, state, and local laws and regulations. Promptly clean up any spilled coolant.
Without degas bottle, fill the cooling system by installing the cylinder block drain plug(s) and close the radiator draincock. Disconnect the heater outlet hose at the water pump (8501) to bleed or release trapped air in the system. When the coolant begins to escape, connect the heater outlet hose.
Fill the radiator until the coolant is between the cap seal in the filler neck to 38mm (1-1/2 inches) below the cap seal. Install radiator cap.
Start engine, warm up, shut off engine. Allow engine to cool, remove radiator cap and check coolant level. Fill as required..."
==

Next up is from my 96's Owner's Guide;
"...Engine Coolant
Checking the engine coolant
Your vehicle’s engine coolant protects the engine from overheating in the summer and from freezing in the winter. Check the level of the engine coolant at least once a month, but preferably each time you stop for fuel. Simply
look at the engine coolant recovery reservoir located in the engine compartment. To locate this reservoir, see the diagram of your vehicle’s
engine under Engine types in this chapter. If the engine coolant has not been checked for a long period of time the engine coolant reservoir may eventually empty. If the engine coolant reservoir empties, check the engine coolant level
in the radiator. Read the following warnings before removing the radiator cap. If it is necessary to fill the radiator, refer to the Engine Coolant Refill Procedure in this chapter for instructions.
Adding engine coolant
1. Before you remove the cap, turn the engine off and let it cool. Even when the engine is cool, be careful when you remove the radiator cap.
2. When the engine is cool, wrap a thick cloth around the cap and turn it slowly counterclockwise to the first stop.
3. Step back while the pressure releases.
4. When you are sure that all the pressure has been released, use the cloth to press, turn, and remove cap.
5. Stand away from the radiator opening. Hot steam may blow out or hot engine coolant may even splash out.
Freezing Protection
The factory-installed solution of Ford Premium Cooling System Fluid and water will protect your vehicle to s35°F (s37°C). Check the freeze protection rating of the engine coolant at least once a year, just before winter.
Add engine coolant only to the recovery reservoir. If the coolant level is low, add to the reservoir a 50/50 mixture of water and the type of engine coolant that Ford specifies. You may add water by itself only in an emergency, but
you should replace it with a 50/50 mixture as soon as possible.
Ford Premium Cooling System Fluid is an optimized formula that will protect all metals and rubber elastomers used in Ford engines for four years or 50,000 miles (80,000 km). It is not necessary and not recommended to use supplemental coolant additives in your gasoline powered vehicle. These additives may harm your engine cooling system. Follow the recommended service interval for changing your engine coolant.
NOTE: When you change or add engine coolant, it is important to maintain
your engine coolant concentration between 40% (-11°F [-24°C]) and 60%
(-62°F [-52°C]), depending on your local climate conditions. Below 40% you will lose freeze protection and above 60% your engine may overheat on a warm day.
NOTE: Do not use an engine coolant that does not meet all 14 requirements of Ford Specification ESE-M97B44-A. The use of an improper coolant may void your warranty for the engine cooling system. Use only a premium nationally recognized brand name engine coolant. Ford Motor Company expressly authorizes the Ford Rotunda engine coolant recycling process
and chemicals. Use only Ford Rotunda recycled engine coolant or an equivalent recycled engine coolant that is certified by the supplier to meet
Ford specification ESE-M97B44-A. NOTE: Always dispose of used automotive
fluids in a responsible manner. Follow your community’s standards for
disposing of these types of fluids. Call your local recycling center to find out
about recycling automotive fluids.
Use Ford Premium Cooling System Fluid or an equivalent engine coolant that meets Ford Specification ESE-M97B44-A. Do not use alcohol or methanol antifreeze and do not use engine coolant mixed with alcohol or methanol
antifreeze. If you do not use the proper coolant, the aluminum radiator on your vehicle will corrode.
Leave the engine coolant in all year. Make sure that the coolant will not freeze at the temperature level in which you drive during winter months. Keep a mixture of engine coolant in your engine that has a protection rating of at least -34°F (-37°C), or whatever protection rating is appropriate for the climate in which you live.

You may add water by itself only in an emergency, but you should replace it with a 50/50 or appropriate mixture as soon as possible.
Have your dealer check the engine cooling system for leaks if you have to add a quart (liter) of engine coolant more than once a month
Checking hoses
Inspect all engine and heater system hoses for deterioration, leaks and loose clamps before adding or replacing engine coolant. Make whatever repairs or replacements that are necessary using Motorcraft parts or their equivalents.
Engine coolant drain and flush To drain your vehicle’s engine coolant:
1. Turn off the engine and let it cool. Fully depressurize the engine cooling system by covering the radiator cap with a thick cloth and turning it slowly counterclockwise to the first stop. Step back while the pressure releases.
2. Remove the cap.
3. Attach a small hose to the drain tube at the bottom of the radiator.
4. Let the engine coolant drain into a suitable container. Disconnect the lower radiator hose at the radiator connector and drain any remaining engine coolant into a container.
5. Reconnect the lower radiator hose and close the radiator drain cock.
Proper procedures for flushing the cooling system can be found in the Truck Service Manual.
Engine coolant refill procedure

After you have drained the engine cooling system:
1. Fill the radiator with a 50/50 mixture of the specified engine coolant concentrate and water. Allow several minutes for trapped air to escape (bubble out) and for engine coolant to flow through the radiator.
2. Replace the radiator cap to its fully installed position, then back off to the first stop. This will prevent high pressure from building up in the cooling system during this part of the fill procedure.
3. Start and idle the engine until the thermostat opens and the radiator upper hose becomes warm.
4. Shut off the engine and allow the engine to cool. Cover the radiator cap with a thick cloth and cautiously remove it. Step back while the pressure releases.
5. Finally, check the radiator and add more engine coolant if needed, following the procedures noted above. Reinstall the radiator cap securely, when finished.
6. If more engine coolant is necessary, fill the overflow reservoir to the appropriate level marked on the bottle..."
I'm tired from C&P now...lol

for more general main info & you do not have an Owner's Guide;
get a 96 Guide dnld for free from;
for any Bronco/Ford truck & other Ford vehicles, for 96 to current year; register to view w/VIN; includes Scheduled Maintenance Guide
Source: by Ford via fleet.ford.com

almost all is appl to 92-95 as well..
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I can hear some sort of fluid moving when I start an already warm engine. I tried the "burp" solutiuon, but I can still hear the fluid movement coming from the glove box area.
I can hear some sort of fluid moving when I start an already warm engine. I tried the "burp" solutiuon, but I can still hear the fluid movement coming from the glove box area.
Yo,
I hear same after new rad, core, hoses and proper Burpppppppp...
Remember that we have the coolant overflow tank sys vs the Newer degas bottle systems.
Here is an overview by Steve83 that partially explains the gurgling;
"...As with virtually every substance, coolant (and any trapped air) expands as it is heated by the engine. Up to a limit, this effect is utilized to create the pressure which increases the boiling point. But excess pressure must be vented, without releasing poisonous coolant onto the ground. So a pressure cap is used either on the radiator for a system with a vented overflow tank, or on the "degas bottle" for a fully-pressurized system. The cap has 3 main functions: a) to seal the pressurized portion of the coolant system up to the target pressure; b) to direct the UNpressurized portion of the vented system into the overflow tank; & c) on this type of system, to allow coolant to return from the unpressurized overflow tank into the pressurized system when the system develops a vacuum (during cool down). This return of vented coolant from the overflow is dependent on the radiator hoses being fairly rigid, either because of their rubber compounds being stiff, or because of internal springs which support their shape. Hoses that are too soft (often due to oil contamination or just age) will simply collapse, preventing the return of lost coolant from the unpressurized overflow tank. A failed cap is a more-common cause for collapsed hoses. It is also dependent on the overflow hose being airtight from the radiator neck vent to the bottom of the overflow tank. Also, the tank itself must be able to contain the vented coolant. These stipulations are some of the reasons for the increasing use of a pressurized tank (degas bottle) which is designed to hold a specific air pocket within the pressurized system. The air creates a spring that allows for coolant expansion without the risk of coolant loss due to venting; even to an overflow tank. Both systems ultimately allow failsafe venting to the ground..."
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