C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Coolant Leak Origin?

Thread Tools
 
Search this Thread
 
Old Apr 28, 2019 | 02:52 PM
  #101  
jackson's Avatar
jackson
Le Mans Master
 
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Default

Many race cars with sbc/BBC have threaded plugs instead of driven. That's done when block out of car.

Is there room to get a large pipe tap into position?
Reply
Old Apr 28, 2019 | 04:09 PM
  #102  
Cavu2u's Avatar
Cavu2u
Thread Starter
Melting Slicks
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2013
Posts: 2,569
Likes: 126
From: San Diego California
Default

Originally Posted by jackson
Many race cars with sbc/BBC have threaded plugs instead of driven. That's done when block out of car.

Is there room to get a large pipe tap into position?
There just isn't.

But, here's what I had to come up with.


I had this cheap claw hammer with the shallow bend claw. The long claws cleared the Engine Mount nubs for a straight-in and even contact with the plug. A lot of tap-tap-tap, but that lent itself to checking the evenness of the side depths often (and to see if I was getting any f@%*ing where with this method ).



Here's the result. I'm not really sure what else I can do at this point, except wait until tomorrow and do a fill check. Not sure if an even layer of extra silicone around the plug would help, but couldn't hurt. No?

Fingers crossed.
Steve
Reply
Old Apr 28, 2019 | 05:01 PM
  #103  
HeadsU.P.'s Avatar
HeadsU.P.
Le Mans Master
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Aug 2017
Posts: 8,336
Likes: 2,809
From: Cool Northern Michigan
Default

You are a master at this. Looks good. In the morning I think I would smear one more layer of goop on the seam, just for the gipper.
Reply
Old Apr 28, 2019 | 05:48 PM
  #104  
Cavu2u's Avatar
Cavu2u
Thread Starter
Melting Slicks
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2013
Posts: 2,569
Likes: 126
From: San Diego California
Default

Originally Posted by HeadsU.P.
You are a master at this. Looks good. In the morning I think I would smear one more layer of goop on the seam, just for the gipper.
Thanks for the kind word.
And one can also become a Master at this.


I smeared a little more on, around the entire edge, just now. Thought it might stick better to an uncured coat.

Anyway, we'll find out.
Steve
Reply
Old Apr 28, 2019 | 08:31 PM
  #105  
jackson's Avatar
jackson
Le Mans Master
 
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Default

Originally Posted by Cavu2u
There just isn't.



Fingers crossed.
Steve
Aww, shucks ... nuthin' to it at all! It's all done with mirrors! easy, just mirrors,
Reply
Old Apr 29, 2019 | 12:18 PM
  #106  
Cavu2u's Avatar
Cavu2u
Thread Starter
Melting Slicks
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2013
Posts: 2,569
Likes: 126
From: San Diego California
Default

Filling.


And hoping.
Reply
Old Apr 29, 2019 | 06:08 PM
  #107  
HeadsU.P.'s Avatar
HeadsU.P.
Le Mans Master
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Aug 2017
Posts: 8,336
Likes: 2,809
From: Cool Northern Michigan
Default

Too bad there is not a way to use about 20 lbs of compressed air to check that instead of water.

Last edited by HeadsU.P.; Apr 29, 2019 at 06:09 PM.
Reply
Old Apr 29, 2019 | 06:45 PM
  #108  
wendellp601's Avatar
wendellp601
Safety Car
10 Year Member
Community Builder
Community Influencer
Photoriffic
 
Joined: Apr 2015
Posts: 4,886
Likes: 202
From: Jackson MS
Default

Originally Posted by HeadsU.P.
Too bad there is not a way to use about 20 lbs of compressed air to check that instead of water.
Would it be possible to use a cooling system pressure tester along with some soapy water sprayed on the freeze plug to check this?
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-1

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-2

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-3

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-4

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-5

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-6

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-7

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-8

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-9

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
Old Apr 29, 2019 | 06:58 PM
  #109  
HeadsU.P.'s Avatar
HeadsU.P.
Le Mans Master
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Aug 2017
Posts: 8,336
Likes: 2,809
From: Cool Northern Michigan
Default

What if, Mr. Spock. What if. You used a pressure tester?
Reply
Old Apr 29, 2019 | 07:20 PM
  #110  
wendellp601's Avatar
wendellp601
Safety Car
10 Year Member
Community Builder
Community Influencer
Photoriffic
 
Joined: Apr 2015
Posts: 4,886
Likes: 202
From: Jackson MS
Default

Originally Posted by HeadsU.P.
What if, Mr. Spock. What if. You used a pressure tester?
Like suggested in post #2?
Reply
Old Apr 30, 2019 | 01:42 AM
  #111  
Cavu2u's Avatar
Cavu2u
Thread Starter
Melting Slicks
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2013
Posts: 2,569
Likes: 126
From: San Diego California
Default

Originally Posted by wendellp601
Like suggested in post #2?


HEY! All assembled, wheel on, jackstands removed, back on the ground.
Filled.


Header attached.


Solid copper Collector Gasket used.


Spark Plugs and Temp Sensor installed last.


No leaking yet, but of course the real test will be heat and 16 psi. Will hook up the Negative Cable to the Battery tomorrow, take it for a drive, and see.
This thread could be done.


Steve

Last edited by Cavu2u; May 1, 2019 at 06:56 AM. Reason: 16, vice 13 psi
Reply
Old May 3, 2019 | 08:24 AM
  #112  
Cavu2u's Avatar
Cavu2u
Thread Starter
Melting Slicks
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2013
Posts: 2,569
Likes: 126
From: San Diego California
Default Success.

Well, it appears this leak is fixed, as the Freeze Plug is holding great after 2 days of driving.

The thread started out as WHAT was leaking, and I was glad it wasn't the Cylinder Head.
Then it went to how to replace a Freeze Plug that was directly under an engine mount.
Got lotz of good help and suggestions along the way, of which I am truly grateful.

Thanks much.
Steve
Reply
Old May 3, 2019 | 09:33 AM
  #113  
jackson's Avatar
jackson
Le Mans Master
 
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Default

Great!

I hear there's a gent in La Jolla who has same problem, same location ... you're on it, right?
Reply
Old May 3, 2019 | 11:25 AM
  #114  
Cavu2u's Avatar
Cavu2u
Thread Starter
Melting Slicks
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2013
Posts: 2,569
Likes: 126
From: San Diego California
Default

Originally Posted by jackson
Great!

I hear there's a gent in La Jolla who has same problem, same location ... you're on it, right?

No! I'll be watching. Thanks.

Steve
Reply
Old May 3, 2019 | 12:25 PM
  #115  
jim-81's Avatar
jim-81
Drifting
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2011
Posts: 1,743
Likes: 289
From: Chardon Ohio
Default

Wow - awesome thread. Glad you got it fixed and good job documenting the process. So cool to see the final outcome, so many threads start off with a problem and you don't get to see the solution.
Reply
Old May 3, 2019 | 12:29 PM
  #116  
L-46man's Avatar
L-46man
Melting Slicks
 
Joined: Feb 2017
Posts: 3,232
Likes: 1,232
From: PHX AZ
Default

One thing I find in diagnosing these problems is buying a UV flashlight.
1.Steam clean engine.
2. Jack it up so you can get underneath.
3. run engine to operating temp.
4. Shut down
5. Scan with UV flashlight...the A/F will glow like crazy at the leak.

Remember ; USUALLY fluid leaks flow DOWN AND BACK...so progress to the front and up.

Good luck.

unkahal

Last edited by L-46man; May 3, 2019 at 12:30 PM.
Reply




All times are GMT -4. The time now is 11:00 AM.

story-0
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-1
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-2
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-3
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-4
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-5
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-6
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-7
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-8
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-9
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE