91 v6 4runner overheating - YotaTech Forums


Go Back   >


General Vehicle Related Topics (Non Year Related) If topic doesn't apply to Toyotas whatsoever, it should be in Off Topic

91 v6 4runner overheating

Reply
 
LinkBack Thread Tools Search this Thread
Old 05-30-2006, 09:14 PM   #1
Registered User
Thread Starter
 
Fo by Fo's Avatar
 
Join Date: May 2006
Location: Arizona
Posts: 206
91 v6 4runner overheating

Hey my v6 91 4 runner overheated on me the other day, so I figured it might be the thermostat. I boiled it to see if it opened and everything checked out fine. Confused, I decided to just buy a new thermostat anyways, but that didnt solve the problem, still overheating, so I just pulled it out and have been running fine for the last week or 2 with no thermostat. Any Ideas of what it could be? I was thinking maybe a water pump?
Thanks
Fo by Fo is offline   Reply With Quote
Old 06-03-2006, 06:41 PM   #2
Contributing Member
 
rdharper's Avatar
 
Join Date: May 2006
Location: Morgan Hill, Ca
Posts: 1,066
Quote:
Originally Posted by Fo by Fo
Hey my v6 91 4 runner overheated on me the other day, so I figured it might be the thermostat. I boiled it to see if it opened and everything checked out fine. Confused, I decided to just buy a new thermostat anyways, but that didnt solve the problem, still overheating, so I just pulled it out and have been running fine for the last week or 2 with no thermostat. Any Ideas of what it could be? I was thinking maybe a water pump?
Thanks
Any coolant loss, now that you are controlling the heating?
rdharper is offline   Reply With Quote
Old 06-06-2006, 05:43 PM   #3
Registered User
Thread Starter
 
Fo by Fo's Avatar
 
Join Date: May 2006
Location: Arizona
Posts: 206
No, i just put water in but the level has been fine.
Fo by Fo is offline   Reply With Quote
Old 06-06-2006, 06:49 PM   #4
Contributing Member
 
rdharper's Avatar
 
Join Date: May 2006
Location: Morgan Hill, Ca
Posts: 1,066
Not losing coolant..

Quote:
Originally Posted by Fo by Fo
No, i just put water in but the level has been fine.
Well, if its not losing coolant, then a couple of other possibilities come to mind.

1. Exhaust into the cooling... look for oil in the radiator/coolant.
2. Water not circulating. I believe you said that if you remove the thermostat, you *never* overheat, right? If true, of course, that implies you are circulation adequate water.
3. Water circulating, but radiator is not fully cooling due to some blocked passage.
4. Maybe fan/clutch not kicking in properly.

If you can exclude all of the above, maybe someone else has an idea.
rdharper is offline   Reply With Quote
Old 06-06-2006, 07:45 PM   #5
Contributing Member
 
mtnfreak's Avatar
 
Join Date: Nov 2002
Location: People's Republic of Boulder
Posts: 830
How's the fan? Is it pulling air through? Try a search, there are a ton of ideas on how to check it. Try spraying out the core with a garden hose - too much mud / dust / leaves, etc will restrict the airflow. Any oil in the coolant? Anything abnormal on the underside of the oil cap? If you have to replace, don't F around with anyone else - go straight to performanceradiator.com.
mtnfreak is offline   Reply With Quote
Old 06-13-2006, 10:59 AM   #6
Registered User
Thread Starter
 
Fo by Fo's Avatar
 
Join Date: May 2006
Location: Arizona
Posts: 206
I idled the engine for about 5 min. then shut it off and the fan kept spinning so I think its the fan clutch. I got one just need to install it.
Fo by Fo is offline   Reply With Quote
Old 06-22-2006, 06:15 PM   #7
Registered User
Thread Starter
 
Fo by Fo's Avatar
 
Join Date: May 2006
Location: Arizona
Posts: 206
If my fan clutch was bad, wouldnt that mean the fan wouldn't spin? Cause my fan still spins when the engine is running
Fo by Fo is offline   Reply With Quote
Old 06-22-2006, 06:25 PM   #8
Registered User
 
kdawghuntnfish's Avatar
 
Join Date: May 2006
Posts: 121
Same problem

I am having the same problem. So far I have ruled out the thermostat. I will be having the radiator checked tomorrow. Your fan cluch could be slipping. Try to spin it with the engine off, but warm. If it spins freely it may be slipping. Also, if you notice any oil around the fan clutch it is bad. You can also check the play. Wiggle it and see if there is alot of play in the bearing in the clutch. If your fan has the infamous ring around it like of these trucks, it is hard on the fan clutch becaus of the xtra weight. Here is the link of the post i have been working on to troubleshoot the problem. Good Luck!!!!! /f116/new-thermostat-bad-radiator-blockage-88604/
kdawghuntnfish is offline   Reply With Quote
Old 11-03-2010, 05:08 PM   #9
Registered User
 
Join Date: Nov 2010
Posts: 2
I'm having the same problem. Installed a new thermostat from toyota and a new rad cap. The truck works fine with no thermostat and circulates but just pressures up and gets hot when the thermostat is installed. The water pump is good. I changes it out to make sure.

Any thoughts
Johnny TTT is offline   Reply With Quote
Old 11-15-2010, 04:09 PM   #10
Registered User
 
Join Date: Nov 2010
Location: utah
Posts: 1
I'm having a kind of the same issue, around town it seems to be running right at its normal temp, but once i'm on the freeway for an extended period of time it starts to really heat up almost to the red line any suggestions?
bradbarber is offline   Reply With Quote
Old 07-20-2011, 04:11 PM   #11
Registered User
 
Join Date: Jul 2011
Posts: 3
I was having an overheating problem with the thermostat in, but when it was out the truck ran OK. I replaced the radiator, checked the thermostat (opened at 180), and changed the fan clutch. Turned out to be the head gaskets. Last idiot put the left one on the right side which blocked a coolant hole. It was a pain in the ass but everything is running great now...
RERunner is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Its beginning to look a lot like a head gasket?! (overheating) the1998sr5 95.5-2004 Tacomas & 96-2002 4Runners 13 01-11-2016 09:55 PM
FS[SouthEast]: BudBuilt Cross-member, Warn Fairlead, Autopal Lights, 4Runner Console,OEM Skid Plate BeMiceElf Misc Stuff (Vehicle Related) 7 10-10-2015 09:40 PM
Am I in danger of overheating my Toyota pickup? Jeffreynmandy 86-95 Trucks & 4Runners 21 07-18-2015 08:26 AM
Overflow issues on 93 SR5 Rkellerman 86-95 Trucks & 4Runners 2 07-12-2015 08:42 AM
Radiator leak. Now where to? (2000 v6) Avenged 95.5-2004 Tacomas & 96-2002 4Runners 4 07-09-2015 07:55 AM


Tags
22, 4runner, 88, 91, 92, 94, clutch, code, fan, install, oil, overheat, overheating, pump, put, runner, thermostat, toyota

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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



All times are GMT -8. The time now is 09:04 AM.


2010 InternetBrands, Inc.