Would appreciate thoughts on this issue. Trying to figure out the most cost effective way forward.
60 mi out of Havana my engine
changed sounds on me. I cut it as it was dieing let it cool, refilled the dry oil
pan, and restated to a much clackier sound.
Limped and got some towing from a boat that was traveling with me to make it to Isla Mujeres. So have access to Cancun yanmar
dealer that is well stocked and a nice place to do some work.
Pulled most of the stuff of the motor
hoping for a blown head gasket
. No water
in the oil
but some oil in the water
. Appears the engine
overheated and burned off the oil with non working warning lights.
Have not laid a straight edge on the head
which i will do when i fly back. But no visual cracks or damage, head gasket
looked intack, was moving plenty of raw water
was full and not boiling when it died. Suspect water pump(fresh) or thermostat killed everything else.
Engine turns over smoothly by hand.
N2 cyl does not come all the way to tdc and shows evidence of slapping against the head when i restarted the motor
Bores look good workout scratching or significant wear.
Water passages are in good shape.
Engine block is still in place but will be pulled when i get back with my tools. My suspicion is that i will find that rod bearing trashed giving the 60thous [ish] extra travel both directions for that cyl. Since the block rotates freely and smoothly i am hoping that is the limit of the damage but that os just a barely informed WAG.
Would love to hear from people with experiance tearing deep into these engines. My hope is i can replace that bearing along with maybe that piston and rod, relap valves while i make sure none are bent, put it back together and keep cruising without breaking the bank with a full professional rebuild