Mercruiser head gasket replacement

flournoyg48

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Apr 28, 2023
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The oil in my 1996 bay liner keeps getting water in it so I’ve come to the conclusion that my motor is cracked or I blew the head gasket. Praying that nothing is cracked I’m going to attempt to change the head gasket. Have the gasket shapes changed any over the year or can I buy any 3.0 head gasket?
 

Bondo

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The oil in my 1996 bay liner keeps getting water in it so I’ve come to the conclusion that my motor is cracked or I blew the head gasket. Praying that nothing is cracked I’m going to attempt to change the head gasket. Have the gasket shapes changed any over the year or can I buy any 3.0 head gasket?
Ayuh,...... Define Any 3.0l head gasket,.....
 

matt167

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Sep 27, 2012
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1991 and later I’m pretty sure. You will want one for marine use. They were never used in cars but they were used in fork lifts
 

nola mike

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The oil in my 1996 bay liner keeps getting water in it so I’ve come to the conclusion that my motor is cracked or I blew the head gasket. Praying that nothing is cracked I’m going to attempt to change the head gasket. Have the gasket shapes changed any over the year or can I buy any 3.0 head gasket?
There are other causes of water in the oil
 

flournoyg48

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Apr 28, 2023
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There are other causes of water in the oil
Yeah but I figured blown head gasket would be the best scenario. I found out other reasons would be like a crack in the motor or the manifold so I’m going to replace the head gasket and if one of those is the reason I’ll more than likely find out when I take everything apart
 

Dillusion808

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Nov 20, 2023
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Yeah but I figured blown head gasket would be the best scenario. I found out other reasons would be like a crack in the motor or the manifold so I’m going to replace the head gasket and if one of those is the reason I’ll more than likely find out when I take everything apart
Manifolds seem like a way better first option than just tearing apart the head to change a gasket that may not be leaking.
 

Bondo

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Yeah but I figured blown head gasket would be the best scenario. I found out other reasons would be like a crack in the motor or the manifold so I’m going to replace the head gasket and if one of those is the reason I’ll more than likely find out when I take everything apart
Ayuh,..... Pressure test the cooling system, then you'll know, without wasting yer time, 'n money,....
 

tank1949

Lieutenant Commander
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Apr 4, 2013
Messages
1,894
Yeah but I figured blown head gasket would be the best scenario. I found out other reasons would be like a crack in the motor or the manifold so I’m going to replace the head gasket and if one of those is the reason I’ll more than likely find out when I take everything apart
do compression test FIRST! If good compression, figure you will have to pull and examine engine and/or replace it.
 
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