Overheating 87 Jeep Comanche - JeepForum.com

 
LinkBack Thread Tools
post #1 of 10 Old 09-10-2012, 07:55 AM Thread Starter
birdie5
Registered User
1987 MJ Comanche 
 
Join Date: Mar 2012
Posts: 17
Overheating 87 Jeep Comanche

Question: I've had this Jeep for about seven months now, ran fine, temp stayed under 200, never overheated. Blew the head gasket two months ago, had it replaced (and the thermostat) and since then, it's over heated twice. This last time the engine sounded like it was boiling and antifreeze spewed out all over the road. Also, since I had the head gasket replaced the temp has been going up and down when I drive, not running at a consistent temp like it did before the gasket was replaced. The mechanic can't figure it out. I really need some help on this one, I have to make a 13 hour trip in two days - anyone have any ideas????

birdie5 is offline  
Sponsored Links
Advertisement
 
post #2 of 10 Old 09-10-2012, 10:46 AM
DeejayZeejay
Registered User
1994 ZJ 
 
Join Date: Mar 2012
Location: Macomb
Posts: 325
Radiator replaced and water pump? Check the fins on the condensor and radiator. Make sure they are not bent in or clogged. Replace your temp sensor if original as well.

Jeeps 4 Life!
DeejayZeejay is offline  
post #3 of 10 Old 09-10-2012, 10:59 AM Thread Starter
birdie5
Registered User
1987 MJ Comanche 
 
Join Date: Mar 2012
Posts: 17
I believe so, I know the radiator is new, pretty sure the water pump is too. I will tell him to check the other stuff - thanks so much!
birdie5 is offline  
post #4 of 10 Old 09-11-2012, 07:34 AM Thread Starter
birdie5
Registered User
1987 MJ Comanche 
 
Join Date: Mar 2012
Posts: 17
Mechanic got back to me - cracked piston
birdie5 is offline  
post #5 of 10 Old 09-11-2012, 01:17 PM
dkroll
Registered User
1988 MJ Comanche 
 
Join Date: May 2008
Location: Independence
Posts: 193
9 times out of ten, if a thermostat without a "bleeder valve" is on it, it will cause you all kinds of crap!!! They always want to sell the one which has no bleeder valve, it can drive you crazy until you get the right one. Be sure to check that out. If it don't....they owe you some money bro!
Without this type, you will get air buildup near the head and will overheat. Your temp gauge will go crazy and (I am assuming this is a 4.0L), you will always have temp issues!!!! Serious!!! Check it out....Thank God it is an easy location and quick job.

Doug
dkroll is offline  
post #6 of 10 Old 10-10-2012, 04:47 PM Thread Starter
birdie5
Registered User
1987 MJ Comanche 
 
Join Date: Mar 2012
Posts: 17
Quote:
Originally Posted by dkroll View Post
9 times out of ten, if a thermostat without a "bleeder valve" is on it, it will cause you all kinds of crap!!! They always want to sell the one which has no bleeder valve, it can drive you crazy until you get the right one. Be sure to check that out. If it don't....they owe you some money bro!
Without this type, you will get air buildup near the head and will overheat. Your temp gauge will go crazy and (I am assuming this is a 4.0L), you will always have temp issues!!!! Serious!!! Check it out....Thank God it is an easy location and quick job.

Thanks so much, I just read this. I left a message for the mechanic. I just got the Jeep back last week - AFTER HE PUT A NEW ENGINE IN IT - and today it overheats AGAIN!
birdie5 is offline  
post #7 of 10 Old 10-11-2012, 05:34 PM
cruiser54
Web Wheeler
 
cruiser54's Avatar
1990 MJ Comanche 
 
Join Date: Oct 2009
Location: Prescott
Posts: 11,067
I only use the factory thermostat 83501426 anymore. Has a jiggle valve/bleed hole.
Do you still have the coolant bottle on the passenger side firewall? When it overheats does the coolant come out around that cap? If so, replace the cap with one from Napa. Part number 703-1396.
cruiser54 is offline  
post #8 of 10 Old 10-14-2012, 09:49 PM
ftpiercecracker
Registered User
1990 MJ Comanche 
 
Join Date: Jul 2011
Location: woodbury
Posts: 348
is that the volvo cap?
ftpiercecracker is offline  
post #9 of 10 Old 10-15-2012, 05:50 AM
cruiser54
Web Wheeler
 
cruiser54's Avatar
1990 MJ Comanche 
 
Join Date: Oct 2009
Location: Prescott
Posts: 11,067
703-1396 is Napa's part number for the Volvo cap.
cruiser54 is offline  
post #10 of 10 Old 10-16-2012, 07:40 PM
ftpiercecracker
Registered User
1990 MJ Comanche 
 
Join Date: Jul 2011
Location: woodbury
Posts: 348
Got it.

This is the cap i have and it is fantastic. Had to go through 3 stock caps before i figured it out.
ftpiercecracker 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









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.




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
Comanche overheating gonoles MJ Comanche Technical Forum 9 06-03-2012 11:27 PM
New guy, new to Jeep, got an 86' Comanche E4Marty XJ/MJ Cherokee Non-Technical Forum 0 04-24-2012 02:54 PM
Jeep comanche please help!! ComancheMilton MJ Comanche Technical Forum 6 04-09-2012 11:15 PM
jeep comanche comanchee12 MJ Comanche Technical Forum 4 12-26-2011 05:26 AM
Jeep Comanche help taaylorrb MJ Comanche Technical Forum 2 10-30-2009 04:57 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