Can't Stop My Stang from Running Hot - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 08-25-2004, 08:37 AM
lakecityg's Avatar
Member
 
Join Date: Jun 2003
Location: Lake Charles, Louisiana
Age: 35
Posts: 94
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Can't Stop My Stang from Running Hot

Hey guys, it has been a long time since I have posted anything, but I am in desperate need of help. This is what I have.
'91 Mustang 306,
Vortech S-trim Charger(10 pounds of boost)
trick flow ported heads
trick flow stage one camshaft
trick flow intake
hi-flow water pump
moroso 160* thermostat
3-core radiator, Perma cool 16 inch fan pulling 2950 cfm.

that is the basics. now the problem I have is that my car is overheating. the temp gauge starts off slow and begins to climb to about halfway, it holds there for a while and then it goes a little ways more but does not hit the 270* mark. if i am at a light it climbs a little more, but as i take off it goes down a little(very little). turning on the a/c makes it even worse(climbs even faster)that is the symptoms and here are a few things for you guys to consider before replying. all of the cooling parts are BRAND NEW! radiator, pump, thermostat, catch can, and electric fan. 2 things that I have done may be contributing to the problem, but I want to know what you guys think. I put in 100% antifreeze(ignorance on my part), and also i do not have a fan shroud on the car. i talked with a mechanic and he said these two things make a difference, but by fixing these two, could it possibly bring my car's temp back down all the way to 160*? and what about even going up to a 180* thermostat? could that help remedy the problem? any feedback would be greatly appreciated! thanks in advance!

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 08-25-2004, 09:36 AM
fat50's Avatar
Kenneth Howard hates me...
 

Last journal entry: Engine mock up
Last photo:
Join Date: May 2003
Location: Garden City, Mi
Age: 46
Posts: 129
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I would drain the system and refill it with 50/50 mix, if you are in an area that does not see freezing temps, you could go 70 water/30 antifreeze. Straight antifreeze has poor heat transfer properties. No shroud mean air is not routed through the radiator, it will bounce off and find the path of least resistance. Electric fans usally have a built in shroud? is this a pusher to go along with your mechanical engine fan or replacing the engine fan? They sell an adjustable temp fan switch that lets you set the on/off temps. $25.00 in the Jegs catalog.



Keep us posted if this solves the problem.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 08-25-2004, 10:09 AM
brainsboy's Avatar
brains
 
Last photo:
Join Date: Jan 2004
Location: tampa
Age: 42
Posts: 988
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I doubt that just a fan shroud is going to solve your problem since your running hot even at crusing speeds. As far as 100% antifreeze, hehehe never tried it couldnt tell you, but a few things to consider would be, have you had the heads off? a head gasket backwards will block the cooling passages. Are you sure you have the correct water pump? Ford water pumps can come in both clockwise and counter clockwise direction. Have you ran the car without a thermostat to see what happens. You could have a bad thermostat.

Ben
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 08-25-2004, 11:57 AM
lakecityg's Avatar
Member
 
Join Date: Jun 2003
Location: Lake Charles, Louisiana
Age: 35
Posts: 94
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
i will be changing to a 50/50 mix this evening. as far as the thermostat goes, i have watched my gauge and my radiator at the same time. it opens up right at 160 (does that mean its good though?) but it doesn't stay at 160, it just keeps climbing. as far as the head gaskets, they are good and were definitely installed in the right direction. i just put them on. any more advice??!!
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 08-25-2004, 12:23 PM
1980 Malibu's Avatar
Member
 
Join Date: Jul 2003
Age: 29
Posts: 121
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Make Sure ur Fan is spinning the right way, When i put my electric fan on my Malibu i had it blowing TOWARDS the Radiator, and my Temp got 250ish just sitting there, i quickly ran outside and seen it was blowing the wrongway so i switched the wires and after a few mins the temp went to 210......This could be the problem, let us know.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 08-25-2004, 12:26 PM
DoubleVision's Avatar
Not Considered a Senior Member
 
Last photo:
Join Date: Oct 2002
Location: Heart Of Dixie
Age: 40
Posts: 10,658
Wiki Edits: 0

Thanks: 15
Thanked 60 Times in 57 Posts
Check over the spark timing with a fine tooth comb, also check over the fuel mixture, as a lean mixture will cause it to heat up quickly, snatch a few spark plugs, if you see white and blistered that`s a strong clue. straight antifreeze is never a good idea, when you change the coolant, you may want to add some redline water wetter. Since your running a super charger, I wouldn`t count on your ride running at 160 period, I would move up to at least a 180 thermostat and drill one small hole in it to aid in burping the system of trapped air. with a 160, the coolant has to stay in the radiator long enough to do it`s job, which is rid the coolant of heat, and if the thermostat can`t keep it in there long enough due to it`s low opening temp, the coolant returning to the engine is not much cooler than the coolant that just left so in effect the thermostat stays open and it does no good. check the upper and lower hoses, make sure they`re not collapsing. I would go back to a mechanical fan and shroud, as I don`t think a single electric is up to the job of keeping it cool especially being you have A/C. Also what brains boy suggested is a good idea, make sure you have the correct rotation water pump, if it`s a reverse flow and you have it turning clockwise it`ll over heat. lastly, check the condenser in front of the radiator, make sure it`s not clogged or blocked with debris. good luck.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 08-25-2004, 12:33 PM
lakecityg's Avatar
Member
 
Join Date: Jun 2003
Location: Lake Charles, Louisiana
Age: 35
Posts: 94
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
thanks guys for all of the information. i will be turning wrenches the minute I get home. please check back as i keep you updated on things I do and if it works or not. thanks!!!! also anymore tips will still help.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 08-25-2004, 12:36 PM
brainsboy's Avatar
brains
 
Last photo:
Join Date: Jan 2004
Location: tampa
Age: 42
Posts: 988
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Great, I would really like to know if 100%antifreeze would do that
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 08-25-2004, 12:57 PM
fat50's Avatar
Kenneth Howard hates me...
 

Last journal entry: Engine mock up
Last photo:
Join Date: May 2003
Location: Garden City, Mi
Age: 46
Posts: 129
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Straight ethylene glycol antifreeze also should never be used because it needs to be mixed with water (35 percent or more) to lower the solution's freezing point. Straight antifreeze also cools less efficiently than a mixture of antifreeze and water. Running straight antifreeze can raise metal operating temperatures inside an engine 70 to 80 degrees, which may be enough to cause galling problems in the exhaust valves. The maximum concentration of antifreeze should never exceed 65 percent.


taken from this website
http://www.venturers.org/NextGenTech...s/Coolant.html
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 08-25-2004, 09:46 PM
Mad Maggot's Avatar
The lean mean donut machine
 
Last photo:
Join Date: Aug 2004
Location: Red Deer, Alberta, Canada
Age: 31
Posts: 386
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
just a thought... check out www. evanscooling.com, they have a waterless coolant that boils at 375 degrees and gels (does not freeze) at -40 degrees. It has a very high heat capacity, and does not vaporize on the hot metal, eliminating temperature spikes. I put it in my built 350 and I can run almost 12:1 with iron heads and it does not detonate and rarely sees 190 degrees. An engine like yours with the blower and all could definitely see an improvement in cooling with this stuff, but keep in mind it costs $25 per US gallon.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 08-25-2004, 11:18 PM
2-manytoyzs's Avatar
Start those projects someday
 

Last journal entry: Divco - has been on the back burner
Last photo:
Join Date: Dec 2002
Location: Fresno
Age: 64
Posts: 557
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
By the way you described the symptom, it sounds like an efficiency problem. Usually when your temp rises slowly (the longer you drive the hotter it gets) that is an indicator of a system that doesn't have the capacity to cool the engine properly. I have a tbird that did that on long trips (hour or more) where the temp kept getting hotter tried everything until I had replaced everything. I fixed the problem by selling the car!
Try turning on the heater and see if the temp comes down. That adds extra cooling capacity to the system. Check to see it the rubber strips between the radiator support and the radiator is there. That would be another area for loss of efficiency. What type of fan are you running? Get that shroud back on. The fan should sit halfway in the edge of the shroud. I put in a new radiator in my F150 last weekend after a trip to Lodi (2 1/2 hrs)last week. Had the same symptoms as you described - cured the problem. Wouldn't want to be "stuck in Lodi again"! Keep us posted on what you find to cure the problem.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 08-26-2004, 12:54 AM
willowbilly3's Avatar
Member
 

Last journal entry: Body mods
Last photo:
Join Date: Jun 2004
Location: Black Hills, South Dakota
Age: 61
Posts: 1,208
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
There are some obscure issues that need mentioned and one is cavitation, a condition that causes a low pressure area in the coolant flow. This in turn causes air bubbles to form, Bubbles don't cool. The thing mentioned about the 100 solution not cooling well is correct. In a race engine we always ran straight water with a can of wetter like blue ice.
But my first question is; does it boil over or spew out the overflow? If it isn't actually boiling over then you really don't have a problem, except maybe with your guage.
If you aren't running a shroud you might as well throw your engine turned fan in the garbage imo.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 08-26-2004, 05:27 AM
lakecityg's Avatar
Member
 
Join Date: Jun 2003
Location: Lake Charles, Louisiana
Age: 35
Posts: 94
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
ok guys here is my status now. i replaced the 100% coolant with about a 60/40 mixture. this seemed to help a little bit but i had my car only idling. the temp got to 195. so i then idled it up to about 2 grand and the temp climbed up about 15 degrees more. i am not a specialist or a mechanic by any means, so please disregard my ignorance.... which way is the fan suppose to blow on a 91 model mustang? and also i did turn on my heater and it seems(i looked at so many things yesterday I am not 100% sure) that the temp rose a little bit more. also, the water does not bubble out it just keeps on overflowing to my catch can. I know some guys say that a car with a blower and such will not run 160* well my car use to run this way a month ago, in traffic, on the interstate, idling racing or however. then one day it just started warming up on me. i figured it was the fan clutch so i figured it was the perfect time to go with an electric fan. as i did this i changed everything dealing with the cooling system. i forgot to mention all these details earlier but more and more things are coming to light. any thoughts on this? the fan is a Perma-Cool #PRM-19115 2,950 CFM fan.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 08-26-2004, 05:37 AM
willowbilly3's Avatar
Member
 

Last journal entry: Body mods
Last photo:
Join Date: Jun 2004
Location: Black Hills, South Dakota
Age: 61
Posts: 1,208
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Did you O-ring the heads when you huffed it? Sounds like you might have a combustion leak into the head, and even if you did a test for that isn't 100% foolproof that you dont have a leak. All your fans should be putting air across the radiator frnt to rear.

Start it up and run it with the cap off and observe the coolant for bubbles.
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 08-26-2004, 05:57 AM
brainsboy's Avatar
brains
 
Last photo:
Join Date: Jan 2004
Location: tampa
Age: 42
Posts: 988
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Real good point, if your not o-ringed thats probably something to check into, Fords arent like chevys with 5 bolts around each cylinder, they only have 4 and very easy to blow a head gasket with nitrous or supercharging.


Ben
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last 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 email address for yourself.
Email Address:

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

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 On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 06:18 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.