Radiator flush help-puuleeese! - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 09-15-2013, 05:32 PM   #1
Jeeper
 
Join Date: Sep 2013
Posts: 103
Radiator flush help-puuleeese!

Folks- drained rusty water from a brand new radiator. put prestone scale cleaner in --ran engine let sit for a day. drained radiator still rust water----filled radiator--ran jeep---drained -rusty. 4th fill/drain with tap water and still rusty /murkey water---radiator is brand new---next step? Help! thanks

Cliff Z is offline   Quote Quick Reply
Old 09-15-2013, 05:34 PM   #2
Jeeper
 
Join Date: Aug 2013
Posts: 18
Bad heater core?

TX_2000TJ is offline   Quote Quick Reply
Old 09-15-2013, 09:03 PM   #3
Jeeper
 
Alleyway's Avatar
 
Join Date: Sep 2013
Location: Broken Arrow
Posts: 20
Just put a new radiator in my 03 with I6 and 120k and it has rusty lookin coolant also. was thinkin of flushing it also.
Alleyway is offline   Quote Quick Reply
Old 09-15-2013, 09:08 PM   #4
Jeeper
 
Join Date: Jun 2013
Posts: 275
You probably need to drain the block. The 4.0L have plugs you unscrew at/by the side close to the rear, down low. The rust is probably sitting low in the block, and don't want to move.
kawzak is online now   Quote Quick Reply
Old 09-15-2013, 09:19 PM   #5
Jeeper
 
Alleyway's Avatar
 
Join Date: Sep 2013
Location: Broken Arrow
Posts: 20
Quote:
Originally Posted by kawzak View Post
You probably need to drain the block. The 4.0L have plugs you unscrew at/by the side close to the rear, down low. The rust is probably sitting low in the block, and don't want to move.
Thanks I will have to try that, the I6 should hold more than a gallon and a half of coolant. I don't know what engine the OP has.
Alleyway is offline   Quote Quick Reply
Old 09-15-2013, 09:31 PM   #6
Jeeper
 
Join Date: Sep 2013
Posts: 103
flush kit? block drain?

Thanks for the responses! I didn't install a heater hose flush kit--would that help? I also understand the prior owner when he put new radiator in he installed a "failsafe" thermostat. Since I have no heat, I assume the fail safe locked in open mode? i'll install a 195 degree Stant thermostat and drill a bleed hole. How difficult is it to remove the block drain plugs? where are they located? how many? Can I flush when I remove t stat? stick a hose in tstat hole and take lower radiator hose off radiator? thanks!!!
Cliff Z is offline   Quote Quick Reply
Old 09-15-2013, 09:50 PM   #7
Jeeper
 
Join Date: Jun 2013
Posts: 275
The drain plug(s) are on the passenger side (4.0L engine) below the exhaust header draw an imaginary line down from # 5 exhaust port towards the bottom of the block where the oil pan meets up . right above the edge of the oil pan is a fitting, hex or square (may even have a 2nd temperature switch in this hole) depends on Yr model and appiication. Any way unscrew it and coolant/water will run out. If you force water through one of the heater hose fittings on the block-it should come out this drain hole. When done flushing-be sure to put a sealer back on this plugs threads. If it is a temp sensor you will need to put some sealer that won't interfear with the grounding of this sensor (find some silicon sealer that says "sensor safe") Hope this helps.
kawzak is online now   Quote Quick Reply
Old 09-16-2013, 02:33 PM   #8
Jeeper
 
Join Date: Jun 2013
Posts: 275
Your E-mail asked about flushing at/where the thermostat is at-yes, but you will need to remove it first. If you think the thermostat is froze open (does it take a long time to warm up?). If you think it is froze then it is easy to replace. Install the new thermostat with the spring part going into the cylinder head, do NOT over tighten the bolts(156 inch pounds)- you can need to use a inch pound torgue wrench (unless you have been wrenching a long time and know the "feel" . Use a new gasket, scrape the old one off completely off block and housing. install the new thermostat with the small hole at the 12-o-clock position. use black silicon sealer on the cyl head and housing -so it will definitely seal the gasket. Now that it is flushed out-you can use what ever antifreeze you want. If you buy in undiluted-mix use only with DISTILLED water ( $.89 at Wal-Mart)--- (NOT water from your facet), unless you want to be doing this again. This information is for a 4.0L 6 cyl. 10.5 qts of MIXED coolant and DISTILLED water at a 50/50 ratio . Or you can just buy the pre-mixed stuff, its just more expensive that way. FWIW I use the prestone green stuff and change it with the same every 3 yrs. don't mix different brands. If you want to use another-OK, keep using the same stuff. I'm out of breath!
kawzak is online now   Quote Quick Reply
Old 12-30-2013, 06:35 PM   #9
Jeeper
 
Join Date: Dec 2013
Posts: 24
[QUOTE=kawzak;4604433]The drain plug(s) are on the passenger side (4.0L engine) below the exhaust header draw an imaginary line down from # 5 exhaust port towards the bottom of the block where the oil pan meets up . QUOTE]

My '99 TJ has the exhaust header on the driver's side 4.0L I6.

tonkit is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may 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



logo carid shop wrangler parts carid fender flares custom wheels store avs deflectors at carid
» Rates
Get low rates on auto insurance in Canada!

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 09:51 PM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC