cooling system blowing chunks - 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 02-27-2006, 11:30 AM
Hellbilly Hotrods
 
Last photo:
Join Date: Sep 2002
Location: locust, nc
Age: 32
Posts: 187
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
cooling system blowing chunks

ok, i know its been a while since ive been around. its cause ive been way too busy in the shop.

i came upon a new problem today. i keep blowing out parts on my cooling system .

Car:
1988 Corvette race car.
Stock radiator, radiator hoses, routing 16 LB cap. no heater core, interior, smog, anything.
Engine:
383 stroker L98. Pro topline heads, Victor Jr. Water pump. TPI Specialties intake.

we just took out the AC, etc. gutted the car. have not taken out the dash and heater box yet. i was out using it to chase parts, and blew the rubber cap off the intake manifold heater hose fitting twice. hooked up the heater core, blew it apart.

thermostat is not sticking. temp between 180-200 degrees farenheight.

what is going on here?
can i just put steel plugs in both heater hose fittings and be done with it, or will i pop the radiator next?
any help would be nice. got to have it to kershaw on friday.
Michael

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 02-27-2006, 02:58 PM
johnsongrass1's Avatar
Race it, Don't rice it!
 
Last photo:
Join Date: Jul 2002
Location: Columbia, Mo
Age: 37
Posts: 4,078
Wiki Edits: 0

Thanks: 0
Thanked 9 Times in 9 Posts
Sounds like head gasket to me.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-27-2006, 03:28 PM
50 chevy p/u's Avatar
autoglass master tech
 
Last photo:
Join Date: Feb 2006
Location: No, IL
Age: 53
Posts: 69
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Check to see if the rad cap is ok.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 02-28-2006, 08:36 AM
Hellbilly Hotrods
 
Last photo:
Join Date: Sep 2002
Location: locust, nc
Age: 32
Posts: 187
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
head gaskets are fine. passed the leakdown, and there is no oil in the water or water in the oil.
im suspecting the cap. im waiting for it to cool down (bleeding the system again) and then putting a fresh 13 lb cap on it.
well see what happens. cross your fingers.

Michael
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 02-28-2006, 08:56 AM
johnsongrass1's Avatar
Race it, Don't rice it!
 
Last photo:
Join Date: Jul 2002
Location: Columbia, Mo
Age: 37
Posts: 4,078
Wiki Edits: 0

Thanks: 0
Thanked 9 Times in 9 Posts
Pressure is going somewhere, a leak down doesn't always fiind the culprit becuase of the low pressures at room temp. Gasket's can still leak at the typical 5000 PSI they must endure but not at the measly 100 pounds your air line put's on it.


If a cap were bad, it'll either not open at all or open too earlier than the rating on the cap. If it opens too early you have too much pressure in the system for the cap. A 16 pound cap is norm. Blowing off hoses takes a lot more than 30 pounds of pressure. So if the cap didn't open at all, you still have too much pressure in the system. Using a 13 pound cap means all your water will go out the cap instead of blowing hoses off. This is good, however, you shouldn't be blowing water out of the cap either.

No harm in changing caps at all, they go bad pretty easily, the rubber gasket get's dirty and destroyed eventually. You still need to find out why there is so much pressure is in the system.

Try running the engine without the cap on and look for bubbles. Big bubbles. big enough to push water out the cap. It's a pretty sure sign a head gasket is leaking.

Good luck.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 02-28-2006, 09:56 AM
Hellbilly Hotrods
 
Last photo:
Join Date: Sep 2002
Location: locust, nc
Age: 32
Posts: 187
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
if you drive the car normal, we have no problems. if you run it up to 6500, thats when things start to break.
we havent noticed any big bubbles. and my employee informed me today tat he may have accidently nicked the old heater core with a sheetmetal screw when he put it through the firewall.

so we ot the new cap on. im gonna go beat the piss outta it and see what happens.

Michael
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 02-28-2006, 01:26 PM
johnsongrass1's Avatar
Race it, Don't rice it!
 
Last photo:
Join Date: Jul 2002
Location: Columbia, Mo
Age: 37
Posts: 4,078
Wiki Edits: 0

Thanks: 0
Thanked 9 Times in 9 Posts
6000 is a lot of pressure!

2500 is not so much
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 03-01-2006, 07:21 AM
Hellbilly Hotrods
 
Last photo:
Join Date: Sep 2002
Location: locust, nc
Age: 32
Posts: 187
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
fised it. bad cap.
wow, that was an odd one.

Michael
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 03-01-2006, 09:24 AM
johnsongrass1's Avatar
Race it, Don't rice it!
 
Last photo:
Join Date: Jul 2002
Location: Columbia, Mo
Age: 37
Posts: 4,078
Wiki Edits: 0

Thanks: 0
Thanked 9 Times in 9 Posts
Watch for you lower Rad cap pressure purging water out the overflow. You'll know because the tank stay's too full or if you don't have one you'll be adding water periodically.

Glad you got it fixed though.
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Cooling System Flush 73oldsman Engine 2 02-13-2006 07:31 PM
Charging system info............... poncho62 Electrical 11 11-26-2005 08:53 PM
Cooling System Woes chadzeilenga Engine 10 09-14-2005 12:40 AM
Cooling System Gurgle Festive57 Engine 3 08-25-2005 10:51 AM
Cooling Fan for 6 volt system flatheadharold Electrical 2 09-01-2004 09:31 AM


All times are GMT -6. The time now is 04:37 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.