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

have a tricky one for you

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Old May 29, 2011 | 04:27 PM
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Default have a tricky one for you

My buddy has a 90 .

For months now he is loosing coolant fluid ( about 1 liter every 150 miles)
BUT...

No white smoke, exept like 2 seconds while starting cold.
No smoke at all while hot... Car runs great.
Nothing is falling anywhere...
Plugs color are OK. None are cleaner than any others...
Water pump is new...
Nothing can be seem....

Kind of real strange.
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Old May 29, 2011 | 04:30 PM
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Water pump is leaking or radiator slowly.

Intake gaskets.

Porosity in castings.

Do a combustion leak test with a kit from Napa to verify 100% its not a headgasket going bad or similar.

Last edited by 87 vette 81 big girl; May 29, 2011 at 05:14 PM.
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Old May 29, 2011 | 04:32 PM
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Freeze plug or Welch plug too.

In back of block in trans bellhousing area too also to check carefully for very slow coolant leaks.
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Old May 29, 2011 | 04:33 PM
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thanks
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Old May 29, 2011 | 04:34 PM
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You are welcome.

BR
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Old May 29, 2011 | 04:56 PM
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There is a universal type Black Light dye made & sold in USA parts stores like Napa, Carquest, and others.

One dye is used with a petroleum fluids like engine oil, trans ATF, power steering fluid, ect.

The 2nd dye is for engine coolant, works with Green antifreeze & Orange dex-cool coolant.

Use a decent blacklight kit that has "Yellow" safety glasses in it.
Glasses are shaded like a Target gun shooter would wear or Cops- policeman wear shooting guns.

Using the blacklight kit & correct dye additive you will find any coolant leak.
I have been finding very tough fluid leaks for the past 20 years 1st hand that no one else usually could.

Be sure to remove the engine oil fill cap too.
After circulating the coolant additive.
With the blacklight & yellow glasses you will see the dye & coolant mix "Fluorescent up very bright green" like its radioactive from a Hollywood movie.
Thats if the coolant is making its way back into the engine crankcase somehow.

Brian
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Old May 29, 2011 | 06:15 PM
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they have napa in paris?
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Old May 29, 2011 | 06:22 PM
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I like NAPA parts.

To find supplies & tools mechanics used from the 1960's to 1980's I have to stop in the store in person & grab the right paperback catalog myself from them young guys.

Blow the dust off of those old books too.

All they know is what is programmed into a computer.

Trust me on that note.

Brian
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Old May 29, 2011 | 07:11 PM
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Originally Posted by oldalaskaman
they have napa in paris?


nope....

Le PePBoys
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Old May 30, 2011 | 07:32 AM
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Snap-On Tools is in Paris, France too.

I believe they sell a similar Black Light Leak Detection kit to suite your needs along with the correct additive(s) to add to the engine coolant.
Then another additive for all petroleum based oils.

There is no more guesswork using those blacklight kits.

If there is a leak, you will find them within 5 minutes using the kit correctly.

You will be amazed & its very easy to use.

BR
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Old May 30, 2011 | 08:38 AM
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I spent 10 minutes this morning researching for you this morning drinking my coffee.

Looking inside of my Snap On 2011 catalog & checking their website here is what I found & recommend for you since you are In France & likely no Napa USA parts stores nearby.

Snap On is in Paris, France.

#GDCT16 COMBUSTION LEAK TESTER $76.95

# YAUVCOOL LEAK DETECTOR FLUID $35.55

3 Choices of UV/ blacklights :

#ECFUVLITE $87.50

#ECFUVDAUL $102.95

#ECFUV150 $186.95

Snap on does revolving credit with mechanics here in the USA.

Their credit system with Mechanics like myself.
Make your weekly tool payments to the guy in the large white & red van.



Check out their website yourself.
REAL TOOLS ON THERE, NOT CRAP TOOLS.

Good Luck & hope my info helps you out.

Brian
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Old May 30, 2011 | 08:39 AM
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Pressurize the cooling system and see what you can find.
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Old May 30, 2011 | 10:14 AM
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when my 90 did this trick it was the head gasket
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Old May 30, 2011 | 10:28 AM
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Originally Posted by bill mcdonald
when my 90 did this trick it was the head gasket
mine to..
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Old May 30, 2011 | 11:39 AM
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Another place to look is the heater core...I've seen leaks there as well. And since the heating/ AC system has its own drain you might not ever consider it.

If you are getting the test kit anyway, it's another place to look...

Hope it's something EASY for you...
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Old May 30, 2011 | 10:50 PM
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#7 head gasket on mine
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Old May 31, 2011 | 07:13 PM
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My temp control valve has a slow drip when it is on hot.....I was wondering where my coolant was going and it only seems to leak with the engine running.....
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To have a tricky one for you

Old May 31, 2011 | 09:02 PM
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Originally Posted by 87 vette 81 big girl
I spent 10 minutes this morning researching for you this morning drinking my coffee.

Looking inside of my Snap On 2011 catalog & checking their website here is what I found & recommend for you since you are In France & likely no Napa USA parts stores nearby.

Snap On is in Paris, France.

#GDCT16 COMBUSTION LEAK TESTER $76.95

# YAUVCOOL LEAK DETECTOR FLUID $35.55

3 Choices of UV/ blacklights :

#ECFUVLITE $87.50

#ECFUVDAUL $102.95

#ECFUV150 $186.95

Snap on does revolving credit with mechanics here in the USA.

Their credit system with Mechanics like myself.
Make your weekly tool payments to the guy in the large white & red van.



Check out their website yourself.
REAL TOOLS ON THERE, NOT CRAP TOOLS.

Good Luck & hope my info helps you out.

Brian
I was in Costco a while back & was looking around, & what to my wondering eyes should appear but a set of Snap On hand wrenches in a blister pack- with the familiar "Made in China" imprint on the back of the pack. I could`nt believe it.
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Old May 31, 2011 | 10:10 PM
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Originally Posted by kenv
I was in Costco a while back & was looking around, & what to my wondering eyes should appear but a set of Snap On hand wrenches in a blister pack- with the familiar "Made in China" imprint on the back of the pack. I could`nt believe it.
I was at a truck stop on I-80 about 100 miles west of Chicago 2 weeks ago and seen a "SNAP ON Folding Mechanics Style Knife" for sale.

Blister pack too.
Had me scratching my head likewise.

Possibly Clone tools out there ?

I did not buy the knife.
Paid for my gasoline purchased & left.

BR
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Old May 31, 2011 | 10:17 PM
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Originally Posted by kawchop
#7 head gasket on mine
mine 2
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