Run into a slight issue that I find strange.

Make the story short and simple for you.

I keep finding coolant leaking into the top portion of the spark plug cylinder. Never thought much of it, until today/yesterday the engine started firing on 3 cylinders. Pulled compression to test health of motor. 205/220/220/220.

205 turns out to be the cylinder that is misfiring. I figure that its misfiring because the cylinder is filling up with liquid and stopping the spark from taking place.

Im going to pull the head this week and take a look at it. I just cant imagine what it could be. Head gasket maybe. Id hate to pull the head and see a crack in the block.

If I do find a crack in the block, Im thinking to JBWeld the crack? Hate to have to buy a new block again.

 

Do a leak down test in the low cylinder to see where the pressure might be escaping from. Easier to do this first to see what the problem might be.

 

Well the obvious would tell me that it is leaking from a source that lets in coolant. Only thing I can tell that might be that is the head gasket, or there is crack in the head or block somewhere.

I wont know for sure until I pull the head.

Im pretty sure that it is either or. In the begining of the year I pulled compression and it was 225 across all cylinders. After a season of putting to motor to its limits, I could see it droping 5psi in all cylinders. I did notice that in the begingin of the year there was a slight amount of coolant in the same cylinder, but I passed it off as me spilling some coolant into the cylinder while building it earlier this year. Little did I know that it would come back at end of season to cause this.

 

you beat me to it with the head gasket, though i havent really dealt with any block cracks i feel like that would be a bit more.. noticeable