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Corvette
C4 Forum
I think my head gasket may be bad
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<blockquote data-quote="XFIRE82" data-source="post: 169726" data-attributes="member: 2292"><p>Number 0ne cause is a failed head gasket, but also a bad intake manifold gasket can cause the problem too. Another possibility if the engine has a oil cooler that cracked then it is possible for oil to get into the coolant or vise versa. Since oil pressure is greater than coolant pressure when engine is running then oil will go into the water, but if engine is off and there is pressure in the water then coolant will flow into the oil. The sign of bubbles in the reservior and top rad hose hard as a rock when running is a sign of compression getting into the water. You mentioned a miss in the engine, that could be water leaking into a cyl, usually #7 on those engines from what I remember reading. I would not run it anymore as is. If sat long enough and water is leaking into a cyl, it is possible that later when you hit the starter the engine will lock up as water does not compress and you could bend a rod or crack the block. If you removed all the spark plugs and winged the motor over it might spit water out the bad cylinder(s).</p></blockquote><p></p>
[QUOTE="XFIRE82, post: 169726, member: 2292"] Number 0ne cause is a failed head gasket, but also a bad intake manifold gasket can cause the problem too. Another possibility if the engine has a oil cooler that cracked then it is possible for oil to get into the coolant or vise versa. Since oil pressure is greater than coolant pressure when engine is running then oil will go into the water, but if engine is off and there is pressure in the water then coolant will flow into the oil. The sign of bubbles in the reservior and top rad hose hard as a rock when running is a sign of compression getting into the water. You mentioned a miss in the engine, that could be water leaking into a cyl, usually #7 on those engines from what I remember reading. I would not run it anymore as is. If sat long enough and water is leaking into a cyl, it is possible that later when you hit the starter the engine will lock up as water does not compress and you could bend a rod or crack the block. If you removed all the spark plugs and winged the motor over it might spit water out the bad cylinder(s). [/QUOTE]
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Corvette
C4 Forum
I think my head gasket may be bad
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