Radiator hose flattens - 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 05-05-2007, 05:55 PM
Registered User
 
Join Date: Mar 2007
Location: New York
Posts: 51
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Radiator hose flattens

Any idea why my top radiator hose completely flattens when I start the car? (Chevy 350.) I need to open the radiator cap for it to unflatten. Replaced the hose yesterday. Still happens. Any insights welcome.

JG700

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 05-05-2007, 06:27 PM
curtis73's Avatar
Hates: Liver. Loves: Diesel
 
Last wiki edit: How to find cheap parts
Last journal entry: 1999-2001: Getting it on the road
Last photo:
Join Date: Dec 2005
Location: Carlisle, PA
Age: 40
Posts: 5,151
Wiki Edits: 16

Thanks: 2
Thanked 5 Times in 5 Posts
The water pump is sucking water out of the radiator. Since the thermostat is closed, its not letting water through and the hose collapses. Its not normal though. The thermostat is not supposed to seal in the housing. Its supposed to be "loose" letting water by. There is also an internal coolant bypass that may be somehow closed or clogged, but at any rate there shouldn't be that much suction on the top hose at start up.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-05-2007, 06:57 PM
66GMC's Avatar
Get in, sit down, hang on
 

Last journal entry: Cab Removal
Last photo:
Join Date: May 2005
Location: Olds, Alberta Canada
Age: 57
Posts: 2,761
Wiki Edits: 0

Thanks: 32
Thanked 90 Times in 85 Posts
Some applications use a wound wire spring inside the hose to keep it from collapsing. I know there is one in the upper hose on my 454.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 05-05-2007, 07:01 PM
Registered User
 
Join Date: Mar 2007
Location: New York
Posts: 51
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Do you think replacing the thermostat is needed?
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 05-05-2007, 08:09 PM
Registered User
 
Last photo:
Join Date: Dec 2006
Location: Northeast Kansas
Posts: 113
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
re: radiator hose flattens

Sounds like you might have big air bubble trapped in there. Disconnect your upper hose and refill the system up to that point, let it sit a few minutes to work the air out. Rehook the hose and try again.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 05-05-2007, 08:22 PM
MrPhotographer06's Avatar
Army Strong
 
Last wiki edit: How to remove a VW Type I body
Last journal entry: well once again
Last photo:
Join Date: Jan 2007
Location: Fort Bragg,SC
Age: 22
Posts: 631
Wiki Edits: 1

Thanks: 0
Thanked 0 Times in 0 Posts
my grandparents had a ford back in the 50's like that before they bought their 1952 dodge hardtop convertible (later sold for like $900).. he put a big spring in it.. but later traded the car back in because he said that all fords were built to run hot. about a month later there was a recall on them because they were running hot b/c of hose collapsing...
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 05-05-2007, 08:43 PM
docvette's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Rebuild an alternator Last photo:
Join Date: Mar 2004
Location: Lafayette, california
Age: 62
Posts: 7,362
Wiki Edits: 12

Thanks: 0
Thanked 6 Times in 3 Posts
Doc here,

With summer coming up, you'd be well advised to Drain and flush the system, Replace the thermostat with a New Fail~Safe, and if it doesn't have bypass holes in it, drill an 1/8 in hole in it for closed bypass, Replace the upper and lower hoses with new Internal Spring reinforced hoses, inspect and if needed replace the heater hoses, Refill the Radiator with the proper mix for your climate with coolant.

Burp the system,

To do that, Raise the front of the car slightly, or park it on an uphill driveway,Fill the radiator to the top, put a LESS than pressure cap on it, (I.E. if the system is 15 lbs, put a 10 lbs on it) FILL and KEEP FILLED the recovery system, Do not let it run dry while burping!

Start the car, let it warm, and inspect for leaks, If none, let it run but Keep an eye on the temp gauge. Do Not let it overheat..During this time any air in the system will be expelled into the recovery can, and withdraw coolant back into the system to replace the trapped air..This is why you need to keep the recovery can full while doing this.

It SOUNDS and LOOKS terrible during this proceedure..BUT it is normal..don't worry about it..it will thump and gurgle and push coolant overboard but it's correct..Do this until it stops expelling air..(no more noise/Gurgles) then shut it down, let it cool, and replace with the proper pressure cap.

Summer is Here..

Doc
__________________
Aftermarket Solutions
Electronic & Electrical
Innovations
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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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 11:33 PM.


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.