Frost Plug Block heater install tips - JeepForum.com
 
LinkBack Thread Tools
post #1 of 7 Old 07-09-2009, 08:01 PM Thread Starter
CharlieMopps
Registered User
1989 XJ Cherokee 
 
Join Date: Mar 2008
Location: Madison, wi
Posts: 625
Frost Plug Block heater install tips

I just installed a block heater in a frost plug on my 89XJ so I figure I'd pass along some of what I learned.
  • The radiator drain plug is worthless, hard to get to and sprays fluid everywhere. Just disconnect the lower radiator hose.
  • watch out for the fluid temp sensor! It's right in the way of the frost plugs and easy to break off (ask me how I know)
  • The rear frost plug is damn near impossible to reach. It's under and behind every conceivable obstacle in the engine compartment. To take out the frost plug I had to get a long steel rod, jam it in there and then hit it with a hammer. At this point about 10 gallons of radiator fluid will fall squarely on your face. Do not try to dodge said fluid or you will ram your forehead into the control arm and then not only be wet but have a knot on your head to.
  • for everyone about to tell me I should have pulled the plug on the engine block to drain it... go to hell, I have an 89, there's no way that was coming out.
  • Do NOT use RTV on the oring. It barely fits as it is, and the last thing you need is something sticky all over it... your hands, the block... you'll spend 2 hours cleaning everything after you realize your mistake.
  • At this point you should check out the instructions on the block heater and realize it says to GREASE the oring... oh... so grease up the oring, the slot for the plug, etc... Good time to also check the frost plug for any scale that might be preventing it from going in all the way.
  • I barely had any room to work in, so I finally got sick of making 1/4 turns for hours on end trying to tighten it and decided to sacrifice my allen wrench. I cut it off so it was about 2 inches long and was a better fit.
  • The key to making it fit is first, grease it well... second, tighten the bolt down until it just starts to get snug but you can move it around... then align it so the oring is seated squarely against the block. Then tighten a turn... and check it again. Keep doing this and hopefully it will suddenly pop in. If the oring pops out of one side, you have to loosen the whole thing up and start over.
  • About this time you will realize that antifreeze is like mosquito catnip. No amount of bug spray can overcome the attraction...
  • My oring kept popping out so I finally got a 1" pipe up in there and pried on each side until it popped in.

Hope this helps anyone else that trys this.
Now I have to go order a new temp sensor... lame.

CharlieMopps is offline  
Sponsored Links
Advertisement
 
post #2 of 7 Old 07-09-2009, 08:58 PM
mgramann
Registered User
1998 XJ Cherokee 
 
Join Date: Jul 2008
Location: Milwaukee
Posts: 2,906


Your post made me smile-sorry about your head! Did you make up any swears of your own cuz the normal ones are never enough?
mgramann is offline  
post #3 of 7 Old 07-09-2009, 09:10 PM Thread Starter
CharlieMopps
Registered User
1989 XJ Cherokee 
 
Join Date: Mar 2008
Location: Madison, wi
Posts: 625
no... it was more like gurgling and sputtering. Hit myself squarely in the slowing spreading bald spot I keep telling my wife is just a cowlick.
CharlieMopps is offline  
 
post #4 of 7 Old 07-09-2009, 09:16 PM
99Greenmachine
Registered User
 
99Greenmachine's Avatar
1999 XJ Cherokee 
 
Join Date: Nov 2007
Location: North Carolina
Posts: 2,991
I almost took out some teeth on the LCA mount back when I was messin with the CPS...i know the pain

'99 XJ Sport
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Thank You Hooligan!!!

[SIZE="4"]XJ Dana 44, Yukon 4.56 D44 Gears, LeBaron hood vents for sale
99Greenmachine is offline  
post #5 of 7 Old 09-22-2010, 12:52 PM
larrywj2
Registered User
1998 TJ Wrangler 
 
Join Date: Oct 2009
Location: Fallon, Nv.
Posts: 3
Just about to try it on a 98 Wrangler, thanks for the laughs and advice.
larrywj2 is offline  
post #6 of 7 Old 09-22-2010, 02:14 PM
Diamond-x
Registered User
1991 XJ Cherokee 
 
Join Date: Aug 2008
Location: Socal
Posts: 1,224
Fellow Jeepers feel your pain, share your anguish and revel in your ingenuity!

Now, on to the next mod!
Diamond-x is offline  
post #7 of 7 Old 11-10-2011, 12:28 PM
242cid_xj
Registered User
2000 XJ Cherokee 
 
Join Date: Jul 2009
Location: Detroit
Posts: 7
Engine block heater install on XJ with an inline-6

I posted how I did this on my 2000 Cherokee XJ over at the Wrangler TJ forum. There are a lot of good posts in that thread that will be very useful. Here's the link to my post: https://www.jeepforum.com/forum/f9/en...l#post12479962
242cid_xj is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
Opinions on engine block heater types/install xjinga XJ Cherokee Technical Forum 18 12-19-2013 10:33 AM
Any write ups with pics? Install block heater! tozier9 XJ Cherokee Technical Forum 4 12-16-2008 05:45 PM
How to install a engine block heater on a '90 XJ? CanyonCrawler XJ Cherokee Technical Forum 7 10-10-2007 11:02 PM
how to install a block heater mrtosh XJ Cherokee Technical Forum 9 12-02-2006 06:46 PM
Frost plug on '99 Cherokee? 90StangLX XJ Cherokee Technical Forum 5 10-14-2004 01:24 PM

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 On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome