Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here XJ (84-01)
All OEM related XJ specific tech. Examples, no start, general maintenance or anything that's stock.

Block heater - lower rad hose

Thread Tools
 
Search this Thread
 
Old Nov 22, 2010 | 12:44 PM
  #1  
pmichel's Avatar
Thread Starter
Junior Member
 
Joined: Oct 2010
Posts: 72
Likes: 0
From: NW Oregon
Year: 1993
Model: Cherokee
Engine: 4.0 HO
Default Block heater - lower rad hose

Anyone using one of the block heaters that inserts in the lower radiator hose?
Reply
Old Nov 28, 2010 | 11:12 PM
  #2  
pmichel's Avatar
Thread Starter
Junior Member
 
Joined: Oct 2010
Posts: 72
Likes: 0
From: NW Oregon
Year: 1993
Model: Cherokee
Engine: 4.0 HO
Default

No response so maybe there aren't many of us who use or need these. Bought it at Autozone for about $20. Install took about 45 mins (plus I changed the t-stat since I had to drain the coolant anyway). Have used it for a couple of cold mornings so far. Seems to work great. Starts warm, gets enough defroster heat right away and instant take-off. Has it's own thermostat. A decent alternative to a freeze plug heater.
Attached Thumbnails Block heater - lower rad hose-imgp4311.jpg  
Reply
Old Nov 28, 2010 | 11:22 PM
  #3  
red97cherokeewithsunroof's Avatar
Seasoned Member
 
Joined: Jun 2009
Posts: 472
Likes: 0
From: Middletown, Ohio
Year: 1997
Model: Cherokee
Engine: Straight 6 4.0L
Default

what exactly is a block heater?
Reply
Old Nov 29, 2010 | 05:06 AM
  #4  
tjwalker's Avatar
CF Veteran
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2010
Posts: 5,841
Likes: 117
From: In the middle of Minnesota!
Year: 1999
Model: Cherokee
Engine: 4.0
Default

I used to use them years ago but then switched over to freeze plug heaters.

Should work okay; be sure the two clamps are sufficiently tight as there are now two more places to leak coolant.
Reply
Old Nov 29, 2010 | 09:58 AM
  #5  
djb383's Avatar
CF Veteran
 
Joined: Nov 2009
Posts: 8,172
Likes: 17
From: The Republic of TEXAS
Year: 1998
Model: Cherokee
Engine: 4.0L HO
Default

Actually, 3 more places to leak (where the heater element attaches in the tube).
Reply
Old Nov 29, 2010 | 10:36 AM
  #6  
Rock Toy's Avatar
CF Veteran
 
Joined: Feb 2010
Posts: 2,095
Likes: 3
From: Cove, OR
Year: 1993
Model: Cherokee
Engine: 4.0
Default

Lower radiator hose heaters work ok in the winter, but can cause over heating problems in hotter weather. The restriction caused by the heating element in the lower hose slows coolant flow through the radiator causing over heating.
Reply
Old Nov 29, 2010 | 11:09 AM
  #7  
tjwalker's Avatar
CF Veteran
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2010
Posts: 5,841
Likes: 117
From: In the middle of Minnesota!
Year: 1999
Model: Cherokee
Engine: 4.0
Default

Originally Posted by Rock Toy
Lower radiator hose heaters work ok in the winter, but can cause over heating problems in hotter weather. The restriction caused by the heating element in the lower hose slows coolant flow through the radiator causing over heating.
That is interesting; I never thought about the "restriction" element. Will have to do some research on that.
Reply
Old Dec 6, 2010 | 08:10 AM
  #8  
jeepman156's Avatar
Junior Member
 
Joined: Jun 2010
Posts: 48
Likes: 0
From: Birmingham, AL
Year: 1998
Model: Cherokee
Engine: 4.0
Default

tjwalker, where did you get your freeze plug heater from? I moved from Alabama to Pennsylvania for school and the jeep is not liking starting in the mornings and after school. How much of a pain is it?
Reply
Old Dec 6, 2010 | 08:00 PM
  #9  
repair's Avatar
Member
 
Joined: Nov 2010
Posts: 141
Likes: 0
From: Indy
Year: 2000
Model: Cherokee
Engine: 4.0
Default

Originally Posted by Rock Toy
Lower radiator hose heaters work ok in the winter, but can cause over heating problems in hotter weather. The restriction caused by the heating element in the lower hose slows coolant flow through the radiator causing over heating.
I picked one up and it has no restriction......I don't think that it will fit on my 2000
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
hogluvr
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
7
Sep 16, 2015 08:15 AM
Gauge
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
15
Sep 15, 2015 07:52 PM
HappyTrails
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
6
Sep 14, 2015 08:54 PM
Cherokeegirl89
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
0
Sep 11, 2015 06:13 PM
Azzy
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
0
Sep 8, 2015 10:49 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 



All times are GMT -5. The time now is 07:22 AM.