It's getting hot!! Why oh Why? - Page 2 - 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
  #16 (permalink)  
Old 12-30-2002, 09:56 PM
New Member
 
Join Date: Dec 2002
Location: Memphis
Posts: 17
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

Haha..That was funny.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #17 (permalink)  
Old 12-30-2002, 10:01 PM
Member
 
Join Date: Oct 2002
Posts: 144
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Question

If all the above fails, this could get nasty.

Pulling the thermostat on a flathead V8 with two water pumps would cause dramatic overheating as there was too much pump power. The coolant WAS rushed through the radiator so quickly heat was retained instead of transferred. However Henry has been gone lo these many years and the mavens signing off on vehicle design will no more overdo anything if they can shave a penny.

I have done the upside down thing myself. I have also so consistently been sold the wrong parts by the major discount retailers that the box is opened on the spot and pieces compared before the counter trainee gets away. Just because the part is new does not make it right. It's possible the thermostat is the wrong one and it pinches when you tighten the bolts, not allowing the valve to function.

When you open the hood as the truck overheats, is the fan clutch operating, IE: is the fan turning at engine speed?

Can you see coolant swirling by through the radiator cap opening?

Are BOTH hoses hot at the entrance to the heater box?

If only one is hot, squeeze the cold one with a clamp and gently release that hose at the heater nipple. This should allow coolant to be forced through even a partially clogged heater core. BE VERY CAREFUL. If you are overheating, this stuff will take your skin off in a heartbeat. After you get coolant flow, re-attach the hose. It should then pass coolant along it's length to the engine connection.

As an aside, if you have no, or sluggish flow through the heater core, as long as you are in the vicinity with a hose unhooked, grab the garden hose and do a little backflushing. Use a little common sense as the heater core is designed for twenty PSI and the garden variety garden hose can push out sixty on an ordinary day.

Do you have a brown residue trail at the bottom of the tail-pipe?

Do you hear a definite thud sound at the tailpipe, sort of a dead second instead of the spit of regular exhaust?

Does the truck spit through the carburetor?

If either of the above two occur, use an insulated device to remove spark plug wires one at a time to isolate the offending cylinder(s).

Run a visual inspection of the spark plug(s) from the suspect cylinder(s) then a compression test.

If you hold a piece of paper across the tailpipe and let the truck run, does it become wet?

Did any of this help?

Reply With Quote Quick reply to this message
  #18 (permalink)  
Old 12-30-2002, 11:05 PM
New Member
 
Join Date: Dec 2002
Location: Memphis
Posts: 17
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

My Goodness. That was the best reponse ever. thanks a lot!! With that I believe I can trace it. A lot to work on, I'll let you all know what I find.
Reply With Quote Quick reply to this message
  #19 (permalink)  
Old 12-30-2002, 11:09 PM
New Member
 
Join Date: Dec 2002
Location: Memphis
Posts: 17
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

Oh, by the way. I have not tried a compression test, the tail pipe inspection or gone to the heater core. I would hope that it was anything other than the heater core or the head gasket. Trying the heater core test first then gasket.
Reply With Quote Quick reply to this message
  #20 (permalink)  
Old 12-31-2002, 05:21 AM
Registered User
 
Join Date: Nov 2001
Location: Iowa
Age: 65
Posts: 13
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Post

Something else to check that won't take much time is to pull the radiator. Hold it up so you can look thru it. I have had simular problems to yours and found the radiator cooling fins so full of crap that air couldn't pass thru it.Wash and blow it out ,you won't believe how much crud will be trapped. I did this with my 86 f-150 and cured a serious overheating problem.
Reply With Quote Quick reply to this message
  #21 (permalink)  
Old 01-01-2003, 08:46 PM
crazy larry's Avatar
Member
 

Last journal entry: better comparison before and after shots
Last photo:
Join Date: Oct 2002
Location: East Texas
Age: 43
Posts: 2,298
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

if it still isn't working right, replace the sending unit. after replacing everything in my cooling system except the sending unit, it still "ran" hot. replaced the $4.86 pos and now have a complete brand new cooling system. btw, If your sending unit is disconnected, how do you know your temp?
Reply With Quote Quick reply to this message
  #22 (permalink)  
Old 01-02-2003, 12:05 AM
Member
 
Join Date: Jan 2003
Location: chico california
Posts: 134
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

the thermostat could still possibly open when it is upside down but just at different times than normal (obviously). i had mine on upside down <img src="graemlins/spank.gif" border="0" alt="[spank]" /> and it would register on my actual temp gauge really funky. it would heat up to about 230 and then drop down to 180 really quick. so im just saying that it could be upside down but it still might open.
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 08:09 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.