Liquid sound when starting... - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 11-28-2015, 09:49 PM
Thread Starter
  #1
Jeeper
 
Fogo41's Avatar
 
Join Date: Feb 2015
Location: New York
Posts: 51
Liquid sound when starting...

Have 2010 JKU Sahara... When I start the jeep it on occasion sounds like there is liquid swishing around behind the dash/ in the engine compartment .. And sometimes it's not noticeable , other times you can really hear it .... What is that? Is it bad? Or just normal operation ?

Fogo41 is offline   Quote
Old 11-28-2015, 09:53 PM   #2
Jeeper
 
Join Date: Oct 2013
Location: SoCal.
Posts: 1,216
It is normal. It is the engine coolant moving through the heater core. At least that what I have been told.

Hivedr is offline   Quote
Old 11-28-2015, 10:12 PM   #3
Jeeper
 
derf's Avatar
 
Join Date: Oct 2012
Location: Littleton, CO
Posts: 3,428
You have an air pocket in the cooling system.

It's not uncommon. It won't kill the engine quickly but it is something you want to deal with. I don't know the procedure for fixing it off the top of my head though.
__________________
2001 XJ - 4.0/AW4/NP242/D44/D44
1991 MJ - 2.5/AX5/D35
1987 MJ - 4.0/BA10-5/D35
1986 J10 - 401/700R4/NP208/D44HD/D60FF

My gear ratio calculator
derf is offline   Quote
Sponsored Links
Advertisement
 
Old 11-29-2015, 07:53 AM   #4
Jeeper
 
Wharfrat's Avatar
 
Join Date: Feb 2012
Location: NW NJ
Posts: 1,530
The coolant should be bled in order to properly deal with it. I now have this issue as well since the dealer replaced my water pump under warranty yesterday.

When I replaced the coolant myself last year, it was no big deal I just opened the radiator cap when cold, topped off the coolant and ran it with cap off until the thermostat opened. Then I kept topping it off a little more as it sucked it down and then closed it up and checked the overflow tank every couple days. If you do this make sure you use the right style of coolant for your year.
Wharfrat is offline   Quote
Old 11-29-2015, 08:00 AM   #5
kik
Jeeper
 
kik's Avatar
 
Join Date: Dec 2008
Posts: 8,968
Like derf mentioned, sometimes there's some air in the system. If it hasn't been done your 10 is due for a coolant change (5 yr. or 100,000 mile HOAT is in it from the factory). If it's already been changed try what Wharfrat mentioned. It's not critical. Most times it also works it's way out.
kik is offline   Quote
Old 11-29-2015, 09:09 AM
Thread Starter
  #6
Jeeper
 
Fogo41's Avatar
 
Join Date: Feb 2015
Location: New York
Posts: 51
Thanks guys ... Will get working on it this week
Fogo41 is offline   Quote
Old 11-29-2015, 09:14 AM   #7
RETIRED MODERATER

WF Lifetime Member
 
Old Dogger's Avatar
 
Join Date: May 2012
Location: Hot as Hell Arizona, the home of the mighty Dragon. Beware of your surrounding, because of DANGER!
Posts: 34,700
Quote:
Originally Posted by Wharfrat View Post
The coolant should be bled in order to properly deal with it. I now have this issue as well since the dealer replaced my water pump under warranty yesterday.

When I replaced the coolant myself last year, it was no big deal I just opened the radiator cap when cold, topped off the coolant and ran it with cap off until the thermostat opened. Then I kept topping it off a little more as it sucked it down and then closed it up and checked the overflow tank every couple days. If you do this make sure you use the right style of coolant for your year.
^^^This, plus elevating the front of your wrangler while doing this, will help to bleed out the air. I would also install a new MOPAR Radiator cap.
__________________
1974 CJ5, 2003 TJ, 2013 2 door Black Rubicon, auto, with 4.10 ratio.
Shaking at 40-70 MPH, Read this!!!

The Mighty Dragon is not concerned,
with
the needs of the Hunter....
Old Dogger is online now   Quote
Old 11-29-2015, 09:21 AM   #8
Jeeper
 
Wharfrat's Avatar
 
Join Date: Feb 2012
Location: NW NJ
Posts: 1,530
If you do follow my process you should also have the heat on high the whole time. Forgot to include that.

Just now after changing the oil I simply topped off the radiator and I no longer hear mine on startup. Time will tell though.
Wharfrat is offline   Quote
Old 11-29-2015, 09:33 AM   #9
Jeeper
 
Join Date: Oct 2015
Location: Dallas, TX
Posts: 45
Do these take a special coolant or just the regular green stuff?
GRNDHOG is offline   Quote
Old 11-29-2015, 10:01 AM   #10
Jeeper
 
Copperhead_1's Avatar
 
Join Date: May 2014
Location: Chicago NW Burbs
Posts: 1,104
Mine just disappeared completely randomly one day.

NO green stuff...special coolant.
Copperhead_1 is offline   Quote
Old 11-29-2015, 10:21 AM   #11
RETIRED MODERATER

WF Lifetime Member
 
Old Dogger's Avatar
 
Join Date: May 2012
Location: Hot as Hell Arizona, the home of the mighty Dragon. Beware of your surrounding, because of DANGER!
Posts: 34,700
Quote:
Originally Posted by GRNDHOG View Post
Do these take a special coolant or just the regular green stuff?
^^^2007 through 2012 takes HOAT Antifreeze.
2013 through 2016 takes OAT Antifreeze.

Don't mix the two, because they are not compatible!!!
__________________
1974 CJ5, 2003 TJ, 2013 2 door Black Rubicon, auto, with 4.10 ratio.
Shaking at 40-70 MPH, Read this!!!

The Mighty Dragon is not concerned,
with
the needs of the Hunter....
Old Dogger is online now   Quote
Old 11-29-2015, 08:10 PM   #12
Jeeper
 
Join Date: Oct 2015
Location: Dallas, TX
Posts: 45
Thanks Old Dogger!

I miss the old days when all vehicles took the regular ol' green stuff.

GRNDHOG is offline   Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off






All times are GMT -5. The time now is 02:11 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.1
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, Gladiator, Mopar and Grand Cherokee are copyrighted and trademarked to FCA US LLC.
Wranglerforum.com is not in any way associated with FCA US LLC.