Last year (2011) I noticed I was using some coolant
over the summer season. The coolant
was being drawn from the overflow container after the engine
was stopped. But I couldn't figure out where it was going. The engine oil
looked fine and no noticeable traces of coolant. Winterized the engine for the winter including removing and filling the crankcase with brand new oil
but did not run it after the oil change
3 weeks ago I explained this to the marina mechanic
and he suggested a pressure test. He performed the test using 15 lbs of pressure (my heat exchanged cap is 7lbs) and it didn't move. He conducted the test for 1 hour. He also pulled the plugs and didn't notice anything out of the ordinary, plugs had good color and no moisture (I had not changed the plugs yet from last year).
This past weekend I was ready to do the plugs, etc for spring commisioning, pulled out the dip stick and much to my surprise saw green coolant running down the dipstick.
I met the mechanic
at the marina today and we did another pressue test. Pressurized to 15 lbs and it didn't move after 15 minutes. When he removed the test device you could hear the pressure escape so I know it was holding it. So back to square one.
I'm going to remove all the plugs and look in each cylinder to determine if there is any fluid in them. He also suggested turning the motor
by hand (well wrench) a few times to see if that pumps fluid out of a cylinder. I'm also going to change the oil and refill it. He is also suggesting to fill it with coolant, run the engine to temp and redo the pressue test.
After some further discussion, he seems to think it may be an intake manifold gasket
I'm just looking to get confirmation that this is the appopriate course of action. Has anyone else experienced this type of problem before? Thanks in advance for your input or suggestions. By the way the engine was rebuilt in 2004 with a remaned block (from Jasper engines), all other parts
came off the old engine.