help - found oil on engine block
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Joined: Sep 2009
Posts: 9
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help - found oil on engine block
Hey guys:
Walked into the garage today and noticed a stream of liquid underneath my 68 vette. Poped the hood and found the oil on the engine block. I need some help as to what might have caused it. I last drove the car about 3 weeks ago and didn't experience anything unusual nor did I remember seeing oil on the garage floor until today. Thanks!
Walked into the garage today and noticed a stream of liquid underneath my 68 vette. Poped the hood and found the oil on the engine block. I need some help as to what might have caused it. I last drove the car about 3 weeks ago and didn't experience anything unusual nor did I remember seeing oil on the garage floor until today. Thanks!
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Joined: Jun 2004
Posts: 93
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From: Southgate MI
If it is oil...
1.See if your PCV valve is plugged.
2.Are those intake bolts a recent install? If so you'll need to take them out one at a time and put pipefitting paste on the bolts that's ok for oil and gas. The oil wicks up the bolts and lays on the intake. Of courese those gakset are wet now. If it was mine I'd also replace the intake gaskets.
Someone else may have other things for you to check.
Tom1701
1.See if your PCV valve is plugged.
2.Are those intake bolts a recent install? If so you'll need to take them out one at a time and put pipefitting paste on the bolts that's ok for oil and gas. The oil wicks up the bolts and lays on the intake. Of courese those gakset are wet now. If it was mine I'd also replace the intake gaskets.
Someone else may have other things for you to check.
Tom1701
Safety Car
Joined: Mar 2009
Posts: 3,558
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From: Oakland California
Race Director
Joined: Sep 2002
Posts: 10,362
Likes: 5
From: San Diego - Deep Within The State of CONFUSION!
Yep that is not your engine block it's your intake manifold. And the green liquid is coolant. First thing I would do is replace the thermostat gasket; and while the thermostat housing is off, change the stat too.
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Verdad Gallardo
Burning Brakes
Joined: Aug 2005
Posts: 1,164
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From: Europe, France
Certainly not oil with this color and viscosity, but most likely coolant.
The liquid could come from the upper heater hose or its fitting near the thermostat.
Some of the intake mounting bolts also need to be waterproof. Use Permatex or Loctite sealant on the threads.
It can also be a bad intake or thermostat gasket. In the first case, you'll have to remove the intake manifold to cure the problem.
If you want to know precisely where it comes from, clean everything thoroughly, then keep the hood opened and start your engine.
Let it run until it reaches normal operating temperature so the coolant pressure can increase.
Then you should quickly see some coolant droplets coming from the leaking component.
Last edited by 73StreetRace; May 16, 2010 at 09:23 AM.
