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98 Expedition - air in cooling system? #4619227
12/30/17 10:22 PM
12/30/17 10:22 PM
Joined: Mar 2011
Posts: 318
Florida
Fitz98 Offline OP
Fitz98  Offline OP
Joined: Mar 2011
Posts: 318
Florida
I have a 98 Expedition 5.4 in which I just changed the heater core.
All seems to be working fine, but when I shut it down, it makes a running water sound at the heater core. It sounds like a babbling brook or as if you turned a water bottle upside down to empty it.
It makes the percolating sound for about 30 seconds, almost as if the coolant is settling, or emptying from the core itself.
There are no leaks anywhere and my fluid level remains constant after running many heat cycles.
It seems to me as if air may be trapped.
I have done many burping techniques, but the situation remains the same. It is more noticeable if I shut down while the heater blower is running, than it is if I shut down with the fan off. With the fan off, the sound is still there, but it is slight and subtle.

Re: 98 Expedition - air in cooling system? [Re: Fitz98] #4619254
12/30/17 11:06 PM
12/30/17 11:06 PM
Joined: Dec 2016
Posts: 6,247
Waco, TX
Linctex Online content
Linctex  Online Content
Joined: Dec 2016
Posts: 6,247
Waco, TX
In time, the air should find its way to the coolant expansion tank.

Does the heater work?


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: 98 Expedition - air in cooling system? [Re: Fitz98] #4619263
12/30/17 11:17 PM
12/30/17 11:17 PM
Joined: Oct 2017
Posts: 79
VA
thastinger Offline
thastinger  Offline
Joined: Oct 2017
Posts: 79
VA
Did you replace the hoses as well? The factory hose has a flow restrictor in it and some of the cheaper aftermarket hoses don't have the flow restrictor built into them.

Re: 98 Expedition - air in cooling system? [Re: Fitz98] #4619266
12/30/17 11:21 PM
12/30/17 11:21 PM
Joined: Mar 2011
Posts: 318
Florida
Fitz98 Offline OP
Fitz98  Offline OP
Joined: Mar 2011
Posts: 318
Florida
Yes, heater works.
My biggest concern is electrolysis, I can live with the sound upon shutdown, but it does not seem normal.
I replaced one heater core years ago in the same vehicle (with aftermarket core, this one is from dealer)
I had the same symptoms last time and after some time, the outlet tube developed leaks, upon removal, I see pinholes on 1 tube where quick connect fitting was. Not sure if electrolysis was to blame, or cheaper construction of heater core from after market source.
Anyone have a burping procedure for this vehicle that works, most videos on line have a radiator cap, this one just has reservoir bottle

Re: 98 Expedition - air in cooling system? [Re: thastinger] #4619267
12/30/17 11:24 PM
12/30/17 11:24 PM
Joined: Mar 2011
Posts: 318
Florida
Fitz98 Offline OP
Fitz98  Offline OP
Joined: Mar 2011
Posts: 318
Florida
I only replaced 4" of hose from where previous mechanic bypassed heater core to the heater core connections.
I used a coupler from the factory existing hoses and used factory ends to complete the install
All is the same as original with regards to hoses, except for the connectors

Re: 98 Expedition - air in cooling system? [Re: Fitz98] #4619268
12/30/17 11:27 PM
12/30/17 11:27 PM
Joined: Aug 2017
Posts: 559
MN
14Accent Offline
14Accent  Offline
Joined: Aug 2017
Posts: 559
MN
Try jacking\lifting the front end about 3 feet with the expansion tank cap off and the engine running. Give it 20 minutes with the stat open while you have it in the raised position. Should clear right up.


2013 Chevrolet Volt - Saves enough in fuel to pay for itself!

2003 Cadillac Seville STS - The winter "beater", it uses the Volt's fuel
Re: 98 Expedition - air in cooling system? [Re: 14Accent] #4619274
12/30/17 11:47 PM
12/30/17 11:47 PM
Joined: Mar 2011
Posts: 318
Florida
Fitz98 Offline OP
Fitz98  Offline OP
Joined: Mar 2011
Posts: 318
Florida
I understand the concept, but can't quite figure out how to get a 3 foot front lift at home.
I live in Florida, everything is flat our biggest hill is the garbage dump.

Re: 98 Expedition - air in cooling system? [Re: Fitz98] #4619304
12/31/17 12:56 AM
12/31/17 12:56 AM
Joined: Jun 2003
Posts: 17,361
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,361
Deplorable in apple valley, ca
Check for excessive electrolisis in the coolant with a volt meter. We have had good luck with putting zinc in the overflow bottle


02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: 98 Expedition - air in cooling system? [Re: Chris142] #4619310
12/31/17 01:09 AM
12/31/17 01:09 AM
Joined: Mar 2011
Posts: 318
Florida
Fitz98 Offline OP
Fitz98  Offline OP
Joined: Mar 2011
Posts: 318
Florida
Can you expand on the electrolysis testing procedure?
That is my biggest concern, since I don't ever want to have to change this heater core again plus I don't think my plastic dash parts can handle any more, as it is, I spent days at the junk yard salvaging dash parts to replace all the cracked and broken pieces from removal...age is making it too brittle

Re: 98 Expedition - air in cooling system? [Re: Fitz98] #4619366
12/31/17 04:46 AM
12/31/17 04:46 AM
Joined: Sep 2006
Posts: 1,320
Wisconsin
Black_Thunder Offline
Black_Thunder  Offline
Joined: Sep 2006
Posts: 1,320
Wisconsin
I dont' think you need to lift it 3 ft in the air, but if you could get a pair of ramps like rhino ramps or something that get the front up high enough that the air would work itself out.


or you could always drive it up on ramps and let some air out of the tires for a little extra incline.


I replaced a heater core on my brother's 02 f150 a few years back and i guess i didn't recall hearing any noises afterwards i just filled it up the top and drove it around and rechecked the level etc and the core has been good ever since.


I'd buy Callahan autoparts if I could.
Re: 98 Expedition - air in cooling system? [Re: Fitz98] #4619449
12/31/17 08:52 AM
12/31/17 08:52 AM
Joined: Nov 2006
Posts: 19,931
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 19,931
MA, Mittelfranken.de
Vacuum filling is the answer to your problem but you will need a compressor (a small one will work) and the tool.


ASE L1, Master. Deutsch Meisterbrief.
Re: 98 Expedition - air in cooling system? [Re: Fitz98] #4619529
12/31/17 10:40 AM
12/31/17 10:40 AM
Joined: Jun 2003
Posts: 17,361
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,361
Deplorable in apple valley, ca
Originally Posted By: Fitz98
Can you expand on the electrolysis testing procedure?
That is my biggest concern, since I don't ever want to have to change this heater core again plus I don't think my plastic dash parts can handle any more, as it is, I spent days at the junk yard salvaging dash parts to replace all the cracked and broken pieces from removal...age is making it too brittle
https://youtu.be/6rc9t3Ve_bI


02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: 98 Expedition - air in cooling system? [Re: Fitz98] #4619573
12/31/17 11:51 AM
12/31/17 11:51 AM
Joined: Sep 2015
Posts: 3,861
Connecticut
69GTX Offline
69GTX  Offline
Joined: Sep 2015
Posts: 3,861
Connecticut
Cycling rpm up and down could help. I'm surprised they don't have the high point piping vent on this engine as they did for the 4.6l engines of that same era. I agree with the rhino ramps, then running the engine with the radiator cap off for a while, while cycling rpms. The car being on level ground with a reservoir about the same height as your upper coolant/heater piping makes for inefficient venting.

Expedition gurgling problem following heater core/radiator replacement



----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
Re: 98 Expedition - air in cooling system? [Re: Trav] #4619691
12/31/17 02:22 PM
12/31/17 02:22 PM
Joined: Mar 2011
Posts: 318
Florida
Fitz98 Offline OP
Fitz98  Offline OP
Joined: Mar 2011
Posts: 318
Florida
I have a compressor, how do you do that vacuum filling?

Re: 98 Expedition - air in cooling system? [Re: Fitz98] #4619695
12/31/17 02:25 PM
12/31/17 02:25 PM
Joined: Mar 2011
Posts: 318
Florida
Fitz98 Offline OP
Fitz98  Offline OP
Joined: Mar 2011
Posts: 318
Florida
I tried again today, should the reservoir bottle coolant get warm? I would think it should.
Upper hose is hot, heater core hoses warm, but reservoir bottle is cool.
I tried reving up for 10 minutes, still no hot fluid in bottle.
Car is jacked up on drivers side with fluid level higher than heater core hoses

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