NEED HELP: air in coolant system (water sloshing) F150 - FordTough.ca - Home of Canadian Ford Truck Enthusiasts
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post #1 of 7 (permalink) Old 01-14-2015, 03:33 PM Thread Starter
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air in coolant system (water sloshing) F150

hi guys I got a problem that's got me doin summersalts.
ive got a 2002 supercrew ,322000 km
4.6L
2WD
heres my issue and what ive done

back in October intake gasket was replaced
everything fine till it got cooler in november
I could here air at the heatercore,(water sloshing around)
truck overheats ,pull over shut truck off,head safety sensor kicks in,
everything seems fine.start truck up everything is normal.this happened once a day and only when truck is cold, clear code replace thermostat.still happened
2 weeks ago I replaced rad because top hose was cold so I figured rad was plugged.i replaced reservoir cap
a couple days ago I started hearing water sloshing around again.that tells me air is getting into system.today it overheats ,I was in driveway waiting for truck to warm up.shut truck off wait 5 minutes restart everything ok.
I bled system of air ,drove around its fine again.
now it also takes about 20 Kms for me to feel heat.i fugure the heater core is plugged.
since ive replaced the rad I get less air.
I need to try and flush heater core and see if its plugged when it gets a bit warmer.

ive got no white smoke
don't have oil leaking into coolant

coolant level is not dropping
no coolant in oil
tailpipe is black so no coolant there
truck runs like a dream.

im baffeled

vic
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post #2 of 7 (permalink) Old 01-14-2015, 06:04 PM
 
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Sounds like maybe air pocket in heater core which can be a bitch at times to get rid of. I find usually have to get front end up in the air some in order to bleed it out

Such is life. Just passing through.

04 F150 FX4 Screw 5.4 with couple of mods
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post #3 of 7 (permalink) Old 01-14-2015, 06:23 PM
 
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Welcome to fordtough.ca, unfortunate your first post is having a problem with your ride, good luck finding a solution.

Lots of smart guys on here, hopefully you'll have some luck.

801A - 6550 lb bundle of joy
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post #4 of 7 (permalink) Old 01-14-2015, 08:25 PM
 
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Sounds like the thermostat is in backwards. Or the water pump may need replacement.

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post #5 of 7 (permalink) Old 01-14-2015, 10:20 PM Thread Starter
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Quote:
Originally Posted by Mrmagoo View Post
Sounds like maybe air pocket in heater core which can be a bitch at times to get rid of. I find usually have to get front end up in the air some in order to bleed it out
i use a special funnel that goes on overflow.but air comes back slowly
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post #6 of 7 (permalink) Old 01-14-2015, 10:23 PM Thread Starter
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Quote:
Originally Posted by Destructicon View Post
Sounds like the thermostat is in backwards. Or the water pump may need replacement.
im starting to think the waterpump.can the impellar put air into system.
never had this issue with a waterpump.usually they just leak
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post #7 of 7 (permalink) Old 01-15-2015, 06:19 PM
 
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Quote:
Originally Posted by swissgaurd View Post
im starting to think the waterpump.can the impellar put air into system.
never had this issue with a waterpump.usually they just leak
You'll have a hard time purging the air out of the system if the waterpump isn't working
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