Coolant Flush -
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > Coolant Flush

End of Summer Sale, 20% OFF!2007 - 2011 Jeep JK Long Arm Lift KitsIntroducing MONSTALINER™ UV Permanent DIY Roll On Bed Line

Unread 10-31-2012, 05:31 PM   #1
Registered User
1989 YJ Wrangler 
Join Date: Oct 2012
Location: Scottsdale, AZ
Posts: 7
Coolant Flush

New to this and can't find a write up on how to do it. Looking to flush my coolant before I change out my heater core. Anyone know where I can find a write up for this. 89 6 cyl 4.2L

cloots is offline   Reply With Quote
Unread 10-31-2012, 05:38 PM   #2
Wild Wheeler
jokerchief462's Avatar
1989 YJ Wrangler 
Join Date: Nov 2010
Location: Sin City, Nevada
Posts: 2,847
Check this out
jokerchief462 is offline   Reply With Quote
Unread 10-31-2012, 05:41 PM   #3
Senior Member
bill8bud's Avatar
1995 YJ Wrangler 
Join Date: May 2009
Location: Sacramento, CA
Posts: 868
I found these in the TJ section they should be very close.
bill8bud is offline   Reply With Quote
Unread 10-31-2012, 07:01 PM   #4
Registered User
1995 YJ Wrangler 
Join Date: Jul 2012
Location: Hell, MI
Posts: 7
Heres how i would do it. Drain your coolant and fill with distilled water ($0.89/gallon) and prestone radiator flush. Idle vehicle to temp and run for ten minutes with the heater on. Drain that bad boy again (just pop off the lower radiator hose). Fill with distilled water again and drive a bit. Repeat until the water doesnt come out nasty orange/brown anymore. Then drain and fill with coolant. You can buy a cheap tool at the auto parts store to test that you have the correct mixture. Ive recently done a 4.2 and a 2.5 this way, no problem.
grn95riogrande is offline   Reply With Quote

Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. is not in any way associated with Jeep or the Chrysler Corp.