Idratherbehunting
Cadet
- Joined
- Oct 15, 2015
- Messages
- 11
I removed the powerhead from a 1988 Classic 50. I am trying to figure out the problem with this motor. I have gotten to the point of pressure testing the engine and it will not hold any pressure. The first time I pressure tested it air was leaking by the lower oil seals. I removed the seals and installed new seals and bearings since I was in there. I went ahead and did the same on the top end.
I have the intake ports closed off and the exhaust port sealed off. I am using a bicycle air pump to pump air into the #1 cylinder at Bottom dead center. After a few pumps I begin to hear/feel air coming out of the "water inlet tube" port. To my knowledge at no time should air be able to cross from the combustion air (both intake and exhaust air) and into the water jacket.
I removed the cylinder block cover, removed the old gasket and used gasket maker to make another one. Next I removed the exhaust manifold and did the same thing. I am using the high temp gasket maker to try and find the problem while waiting on the actual gaskets to arrive. The air is still coming out the "water inlet tube". Am i missing something? The gasket between the powerhead and the exhaust plate is a brand new gasket as well.
I have the intake ports closed off and the exhaust port sealed off. I am using a bicycle air pump to pump air into the #1 cylinder at Bottom dead center. After a few pumps I begin to hear/feel air coming out of the "water inlet tube" port. To my knowledge at no time should air be able to cross from the combustion air (both intake and exhaust air) and into the water jacket.
I removed the cylinder block cover, removed the old gasket and used gasket maker to make another one. Next I removed the exhaust manifold and did the same thing. I am using the high temp gasket maker to try and find the problem while waiting on the actual gaskets to arrive. The air is still coming out the "water inlet tube". Am i missing something? The gasket between the powerhead and the exhaust plate is a brand new gasket as well.