LT1-LT4 Modifications 1993-97 Gen II Small Block V8

vanishing coolant

Old Mar 12, 2011 | 05:02 PM
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Something is leaking back didn't smell like coolant
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Old Mar 12, 2011 | 05:24 PM
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So set out here and check and double check for about 30 min the pressure Gage only dropped 1 psi so any other suggestions
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Old Mar 12, 2011 | 10:10 PM
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From: Jackstandican
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Originally Posted by 93z28ltone
So set out here and check and double check for about 30 min the pressure Gage only dropped 1 psi so any other suggestions
At what pressure?
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Old Mar 13, 2011 | 12:40 AM
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18psi
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Old Mar 13, 2011 | 03:18 AM
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had the same problem and it was a head gasket ,, pressure test it
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Old Mar 13, 2011 | 03:36 AM
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ok i did the coolant system pressure test with the tool i rented from autozone what else can i do to check to see if i have head gasket leak
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Old Mar 13, 2011 | 10:02 AM
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You can also get a coolant test. Cost about $30 and it will also tell you if you have a blown head gasket.
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Old Mar 13, 2011 | 11:22 AM
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You can buy that autozone right
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Old Mar 13, 2011 | 12:42 PM
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Originally Posted by 93z28ltone
You can buy that autozone right
I wasted a lot of time screwing around trying to find out why it was overheating and where the coolant was going. I just got so frustrated when I had the same situation and I just took it to a mechanic. He did the test and sure enough, blown head gasket.
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Old Mar 13, 2011 | 05:55 PM
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From: Jackstandican
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Originally Posted by 93z28ltone
18psi
Did you take the plugs out when you did this pressure test? Then rotate the engine to see if any coolant may have been in the cylinders?
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Old Mar 13, 2011 | 08:55 PM
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No I didn't
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Old Mar 14, 2011 | 12:13 AM
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You need to do that. Keep the system pressurized for several hours. Take the plugs out and rotate the engine by hand. Make sure to look very carefully everywhere coolant passes. Just the slightest amount of moisture can mean it is leaking and if the coolant is hot then it'll evaporate before you ever notice. Did you check all the radiator seams?

Last edited by SS RRR; Mar 14, 2011 at 12:19 AM.
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Old Mar 14, 2011 | 01:26 AM
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yes i did i spent a hour and half checking around the hoses and raidiator im about to give up and take it to a shop and see if they can tell me what it is
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