Chevy Silverado
Chevy Tahoe
Air Filters and Intake Manifolds
Chevy 350

What is involved with a 350 Chevy intake manifold that is leaking coolant and oil?

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2009-01-24 19:23:35
2009-01-24 19:23:35

You either need a head gasket or intake gasket.

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Related Questions


Intake manifold is leaking, or worse, cracked cylinder most likely tho, the intake manifold.

Need to check the 4 corners on the intake manifold. It is common for the intake to leak engine coolant.

leaking gasket try tightening the bolts a little might help

It can if it is leaking coolant into engine or out side of engine.

Don't generally see an intake manifold go bad, it is usually the intake manifold gaskets that go bad in which case you may see engine coolant leaking out in the corners or worse case leaking into the engine and mixing with the oil.

There is a heater hose that goes to the left rear top side of the intake manifold and that fitting leaks engine coolant sometimes and it will run down the back of the intake around the distributor. If that fitting is not leaking then the intake manifold gasket is leaking coolant in the corners of it. REplace the intake gasket. That's all that can leak coolant on that year engine. If coolant is leaking out between the transmission and engine block then you have a freeze plug leaking in the back of the engine, between the transmission and block. Must remove the transmission and flywheel to fix it.

Dex-cool coolant highly corrosive is eating away at gaskets mainly intake manifold gasket.

I would suspect the manifold itself is leaking around the cooling passages. It will need to be removed and the gasket replaced.

It is a small 'L' shaped hose that goes from the side if the water manifold to the bottom of the carburetor intake manifold. I believe it is part of the water supply to the carburetor manifold that heats it.

Can be leaking intake manifold gaskets, which can sometimes be fixed by using Dexcool coolant. Can also be a head gasket.

are you sure it's from the egr valve? The EGR itself doesn't need coolant in any way shape or form. Most likely you're leaking coolant from the throttle body. Or it may be from the rear of the intake manifold. are you sure it's from the egr valve? The EGR itself doesn't need coolant in any way shape or form. Most likely you're leaking coolant from the throttle body. Or it may be from the rear of the intake manifold. are you sure it's from the egr valve? The EGR itself doesn't need coolant in any way shape or form. Most likely you're leaking coolant from the throttle body. Or it may be from the rear of the intake manifold. are you sure it's from the egr valve? The EGR itself doesn't need coolant in any way shape or form. Most likely you're leaking coolant from the throttle body. Or it may be from the rear of the intake manifold.

Where was the leak coming from? the coolant has some pathways that go to the intake. that's to warm up the air.the most important question is where the coolant was leaking from?

Check to see if there is coolant on the engine block. It is common for the Monte Carlos, along with other GM cars equipped with the 3400 V6 engine to experience leaking intake manifold gaskets. A leaking intake manifold will cause oil to leak into the coolant system and even worse, for coolant to leak into the oil system.

if its a 3.1v6,then it is a intake manifold gasket problem, the 3.1 a noted for this!! check to see if gasket is bad.

Because it's leaking somewhere. Other than lines in the cooling system, head and intake manifold gaskets are a possibility.

maybe it's not the intake gasket. Maybe it is the intake manifold itself, they were bad about cracking. Also there is a coolant line that runs under the manifold that likes to leak as well. It's more likely to be a ruptured/cracked intake manifold as this is a common problem on these cars. See detailed info on the problem (and how to fix it) here: http://www.autoclinix.com/Manifold.htm

Most likely the intake manifold gasket is leaking.

A manifold leak is usually in reference to a failure of the intake manifold gasket. It can leak air, oil or coolant. It can leak to the outside of the engine or internally into the engine. A manifold leak may also refer to the Exhaust manifold that is leaking exhaust fumes from a bad gasket or a crack in the manifold.


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