avtodiagnostician
New member
I have a 33 year old Bayliner boat with a 5.0L Mercruiser V8. I bought it a year and a half ago. Last summer I rode it with friends, children and grandchildren, but not for long. Water has entered the engine. In cylinders 1 and 3.
An autopsy revealed that the head gasket was broken and both heads were bent. 2-4-6-8 is less, and 1-3-5-7 is more. Additionally, the 1-3-5-7 head has a crack running straight through the cylinder 5 exhaust valve seat.
Both castings have part number 14101081. Used GM V8 parts are very hard to find in my country. Because there are not many of these cars either. That's why I can't find head 14101081 yet. But I found two heads 14102193 in decent condition. I already read on the Corvette forum that these are TBI swirl heads. And that they are criticized for not allowing the engine to rev above 5000. But for the Mercruiser you don’t need that much.
I also found information that both my 14101081 and 14102193 have a 58 cc chamber. The exhaust valve is the same, 1.5. My intake valve is 1.84, and on the head 14102193 it is 1.94. But I also discovered that on 305 engines the exhaust valve is sometimes bored to 1.94 for better purging. So it's not scary either.
But I still haven't found the answer to the most important question: can TBI swirl heads be used on a carburetor engine?
Will my carbureted Mercruiser V8 5.0L work if I replace the 14101081 heads with 14102193? Of course I'll get these heads in order.
An autopsy revealed that the head gasket was broken and both heads were bent. 2-4-6-8 is less, and 1-3-5-7 is more. Additionally, the 1-3-5-7 head has a crack running straight through the cylinder 5 exhaust valve seat.
Both castings have part number 14101081. Used GM V8 parts are very hard to find in my country. Because there are not many of these cars either. That's why I can't find head 14101081 yet. But I found two heads 14102193 in decent condition. I already read on the Corvette forum that these are TBI swirl heads. And that they are criticized for not allowing the engine to rev above 5000. But for the Mercruiser you don’t need that much.
I also found information that both my 14101081 and 14102193 have a 58 cc chamber. The exhaust valve is the same, 1.5. My intake valve is 1.84, and on the head 14102193 it is 1.94. But I also discovered that on 305 engines the exhaust valve is sometimes bored to 1.94 for better purging. So it's not scary either.
But I still haven't found the answer to the most important question: can TBI swirl heads be used on a carburetor engine?
Will my carbureted Mercruiser V8 5.0L work if I replace the 14101081 heads with 14102193? Of course I'll get these heads in order.
