This will take you to the main site where there is history, technical information and other information on these cars.
This takes you back to the main page of the forums.
This is the control panel to change your password, information and preferences on this message board.
Click here if your lost your password or need to register on this message board. You must be a registered user to post. Registration is free.
Search this board for information you need.
Click here to buy cool Squarebirds mechandise.
Click here to support Squarebirds.org. For $20 annually receive 20mBytes webspace, a Squarebirds e-mail address and member's icon on the message board.
  #1  
Old 03-11-2012, 09:36 PM
Jackgo Jackgo is offline
Newbie
 
Join Date: Mar 11 2012
Posts: 5
Jackgo is on a distinguished road
Default 1965 coolant steaming

In my 65 390 engine. When engine is hot
And turned off there is a steam coming out of
Overflow tube on surge tank.
Is this normal or I need to add coolant.
Appreciate any help.
Reply With Quote
  #2  
Old 03-11-2012, 10:13 PM
LuckyJay's Avatar
LuckyJay LuckyJay is offline
Experienced
 
Join Date: Jan 4 2007
Posts: 234
LuckyJay is on a distinguished road
Wink

That would be normal if the tank were overfilled. That is why it is called an expansion tank. Leave it a couple of inches shy of full when cold.
Reply With Quote
  #3  
Old 03-11-2012, 10:31 PM
Jackgo Jackgo is offline
Newbie
 
Join Date: Mar 11 2012
Posts: 5
Jackgo is on a distinguished road
Default

Thanks.
But there is room there for expansion.
Could it be that there is no enough fluid there.
It doesnt do it when engine is running and it's hot.
Only starts about a minute after engine is turned off.
Any ideas?
Reply With Quote
  #4  
Old 03-12-2012, 03:29 AM
simplyconnected's Avatar
simplyconnected simplyconnected is offline
Slow Typist
 
Join Date: May 26 2009
Posts: 7,598
simplyconnected is on a distinguished road
Default

Jack, do you enjoy working on engines? I ask this because you can do a simple procedure that will take up one Saturday afternoon, but the rewards are great and it doesn't cost much if you do the work yourself.

Your engine is old. Has it ever been overhauled? I could ask a ton of questions but I will get to the point...

It might be time to clean out your water jackets and change freeze plugs. You can do this in your driveway. Disconnect your battery, pull your starter, and remove all six freeze plugs. Then start your garden hose. Using a coat hanger and lots of water, go around the bottoms of your cylinders with the coat hanger and let the water flush the engine. Do both sides.

Buy brass freeze plugs and tap them in with a small hammer. Replace your starter, antifreeze, and battery connection. Done.

CLICK HERE to check out the nasty freeze plugs in the 390 I'm doing for Penelope.

You may have a simple problem like a leaky radiator cap, but it is high time your block gets a proper flush. These kits sold by Prestone aren't capable of really cleaning your block. I often wondered why all the Squarebirds have an overheating problem. Then I found out why... any block doesn't stand a chance with so much mud inside, and most folks won't do freeze plugs until one leaks. - Dave
__________________
My latest project:
CLICK HERE to see my custom hydraulic roller 390 FE build.

"We've got to pause and ask ourselves: How much clean air do we need?"
--Lee Iacocca
Reply With Quote
  #5  
Old 03-12-2012, 09:15 AM
Jackgo Jackgo is offline
Newbie
 
Join Date: Mar 11 2012
Posts: 5
Jackgo is on a distinguished road
Default

Thanks Dave
I will certainly look into it before spring comes.
Reply With Quote
  #6  
Old 03-12-2012, 05:40 PM
redstangbob redstangbob is offline
Experienced
 
Join Date: Feb 18 2011
Posts: 217
redstangbob is on a distinguished road
Default

Cleaning the block and replacing the core plugs are both worth while things to do, but as to the steaming it's pretty straight forward. The coolant level is to be at the baffle in the expansion tank, no higher. Steam coming from the overflow hose is either too much pressure building in the cooling system, or a bad cap. A pressure tester on the engine while running will show if it's building pressure, that's not a good sign and indicates bad head gaskets or cracks in the castings. If you're unsure of the cap at all, just replace it. The book calls for a 12-15 lb cap. You didn't mention if you had problems with overheating. Hope that helps, Bob C
Reply With Quote
  #7  
Old 03-12-2012, 11:39 PM
Jackgo Jackgo is offline
Newbie
 
Join Date: Mar 11 2012
Posts: 5
Jackgo is on a distinguished road
Default

Thanks Bob
It is not overheating but the temp gauge tends to occupy
Letter "p"- is this too high?
Can you tell me how to check pressure?and what it should be.
I'm also thinking of checking radiator bottom for mud.
Reply With Quote
  #8  
Old 03-13-2012, 02:55 AM
simplyconnected's Avatar
simplyconnected simplyconnected is offline
Slow Typist
 
Join Date: May 26 2009
Posts: 7,598
simplyconnected is on a distinguished road
Default

Jack, my radiator shop will pressure test and flow test for free if I bring in a bare radiator. Typically, lime deposits plug your cores and prevent flow. Fresh antifreeze has mild phosphoric acid (like CLR) that keeps your cores clean.

A hand-held infrared heat gun, pointed around your radiator, will tell the real story.

Your engine is another story. Coolant flow can take many paths, and you know that flow always takes the path of least resistance. After corrosion sets in and rust builds, you may have engine areas that get no flow. Those areas remain wet but they create steam. Pressurized radiator caps raise the boiling point nearly three degrees per psi. - Dave
__________________
My latest project:
CLICK HERE to see my custom hydraulic roller 390 FE build.

"We've got to pause and ask ourselves: How much clean air do we need?"
--Lee Iacocca
Reply With Quote
  #9  
Old 03-13-2012, 09:46 AM
redstangbob redstangbob is offline
Experienced
 
Join Date: Feb 18 2011
Posts: 217
redstangbob is on a distinguished road
Default

Quote:
Originally Posted by Jackgo View Post
Thanks Bob
It is not overheating but the temp gauge tends to occupy
Letter "p"- is this too high?
Can you tell me how to check pressure?and what it should be.
I'm also thinking of checking radiator bottom for mud.
Your temp is a bit high, it should run right in the middle of the 'M'. You should verify the accuracy of the gauge first before 'fixing' anything With the car at operating temp, check the water in the top tank, it should be very close to the T'stat temp. If in doubt replace the electric temp sender just behind the distributor (get a good one). To see if your system is building pressure, a tester is used. I have a Stant brand http://www.stant.com/Consumer-Produc...rs---Adapters/ I don't recommend you buy your own, they're not cheap. The tester is put on the expansion tank and the car is run, if compression gasses are present, the gauge will show the pressure rise. Some increase is normal, but more than a few pounds usually indicates trouble. You aren't overheating or boiling over, I doubt you have a serious problem. As Dave offered, a radiator shop can make that test, and test the cap with the same tool as well as use the infrared to check temps. You can get an infrared fairly cheap if you catch one on sale. You probably need a good flush and a new cap, but have it looked at to be on the safe side. Good luck, Bob C
Reply With Quote
  #10  
Old 03-14-2012, 09:32 AM
Jackgo Jackgo is offline
Newbie
 
Join Date: Mar 11 2012
Posts: 5
Jackgo is on a distinguished road
Default

Thanks Bob
Could all this be caused by a faulty thermostat?
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 04:15 PM.

Driving, racing or working on cars can be hazardous. The procedures and advice on this website including the message board are opinion only. Squarebirds.org and its webmasters and contributors do not guarantee the correctness of the advice and procedures. The Squarebirds.org and its webmasters assume no liability for any damage, fines, punishment, injury or death resulting from following these procedures or advice. If you do not have the skills or tools to repair your car, please consult a professional. By using this site you agree to hold harmless the Squarebirds.org, its authors and its webmasters from any resulting claim and costs that may occur from using the information found on this site.

Powered by vBulletin® Version 3.6.8
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Any submissions to this site and any post on this site becomes property of Squarebirds.org . The webmasters reserve the right to edit and modify any submissions to this site. All material on this is site is copyrighted by the Squarebirds.org. Reproduction by any means other than for personal use is strictly prohibited. Permission to use material on this site can be obtained by contacting the webmasters. Copyright 2002-2016 by Squarebirds.org.