C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Coolant leak 1986

Thread Tools
 
Search this Thread
 
Old 06-22-2013, 09:56 AM
  #1  
rangepony69
Instructor
Thread Starter
 
rangepony69's Avatar
 
Member Since: May 2013
Location: Greensboro NC
Posts: 115
Received 3 Likes on 3 Posts
Default Coolant leak 1986

Not sure where to go now.......I have a coolant leak under the engine on the right side. It only leaks when the engine has just been turned off, still under pressure and warm. No leak when cold or running....leak is small, about the size of a good pancake once the engine has been stopped. The heater box/suitcase is dry, leak appears to come from the union of the transmission and engine at the bottom of the right side just behind the right front tire. Strange huh?

Any help/thoughts would be appreciated.

Rangepony
Old 06-22-2013, 10:57 AM
  #2  
desertmike1
Melting Slicks
 
desertmike1's Avatar
 
Member Since: Aug 2008
Location: Palmdale CA
Posts: 2,082
Received 50 Likes on 49 Posts

Default

You need to get your self a bright flashlite and trace it, it's either leaking down from above or from the back of the Block (Freeze plug)
Old 06-22-2013, 12:30 PM
  #3  
rangepony69
Instructor
Thread Starter
 
rangepony69's Avatar
 
Member Since: May 2013
Location: Greensboro NC
Posts: 115
Received 3 Likes on 3 Posts
Default Coolant leak

10-4...........I did that this morning and my first reaction was freeze plug..............wonderful news................

Thanks for your thoughts.
Old 06-22-2013, 03:45 PM
  #4  
lkl2005
Pro
 
lkl2005's Avatar
 
Member Since: May 2012
Posts: 519
Likes: 0
Received 4 Likes on 1 Post
Default

My 86 had a leak at the right rear corner of the intake. Good artificial light is good. Get it out there in the sun light and use your nose also.
Old 06-22-2013, 04:24 PM
  #5  
ch@0s
Le Mans Master
 
ch@0s's Avatar
 
Member Since: Oct 2008
Location: Houston Texas
Posts: 9,758
Received 38 Likes on 32 Posts

Default

You can rent a pressure tester and look for the leak when its cold. The TPI is famous for leaking intake. My 86 and 91 were both leaking in the right rear . GL with it
Old 06-22-2013, 05:15 PM
  #6  
rangepony69
Instructor
Thread Starter
 
rangepony69's Avatar
 
Member Since: May 2013
Location: Greensboro NC
Posts: 115
Received 3 Likes on 3 Posts
Default Coolant leak

Thanks for all your responses. I'm going to clean the area in the right rear and see if I can see anything. I also need to clean/paint the valve covers so I'm thinking I may take it all apart and do it all at one time. Good thing I'm retired..............

Rangepony
Old 06-22-2013, 11:13 PM
  #7  
Cliff Harris
Race Director
 
Cliff Harris's Avatar
 
Member Since: Apr 2002
Location: Anaheim CA
Posts: 10,036
Likes: 0
Received 341 Likes on 312 Posts

Default

Check the steam line -- the small pipe and rubber hose that goes from the heater hose to the rear of the intake manifold on the passenger side. Mine had a pinhole leak in the bottom that was otherwise invisible. I only found it by accident when i happened to see water leaking in that area. It had been leaking for quite a while, based on the rust on the frame.

One of the heater hoses could be leaking.

The water valve on the heater manifold might be leaking.
Old 06-23-2013, 07:38 AM
  #8  
Cruisinfanatic
Le Mans Master
Support Corvetteforum!
 
Cruisinfanatic's Avatar
 
Member Since: Jul 2004
Location: Clifton Park, NY ..............Clearwater, FL ... 85 Original Owner
Posts: 5,745
Received 553 Likes on 432 Posts

Default

I don't see how your water pump could be leaking because you say the system is always full except for the reservoir.

Get notified of new replies

To Coolant leak 1986




Quick Reply: Coolant leak 1986



All times are GMT -4. The time now is 03:11 PM.