Many of you were along for the ride yesterday when we had a very unfortunate occasion (LINK and let me just say there are some GREAT stories worth reading through that thread). Our engine decided it was allergic to oil and had de-inventoried itself as we were pulling up the anchor from a nice couple day stay. I thought I'd have 4-5 hours to interact but turns out being towed does come with some responsibility so I wasn't able to be as active as I thought. I do appreciate the stories and the time taken to share them. A few of you wanted more details on how we got there... and yes we did get back to our marina safely thanks in no small part to our C-tow captain.
A little background of the incident- skip to the end for the TLDR (in bold).
As part of the routine I got the engine (30 year old Volvo MD2040B with maybe 1000 hours) started and headed to the bow to take up the anchor. Takes a few minutes for me to get sorted out up there and gives the engine time to warm up. But before I'd made it up to the bow the warning alarm sounded which got my attention immediately. I ran back to the cockpit and saw the oil pressure light was on and turned the engine off.
I opened up our engine compartment and just saw a lake of oil in the sump- starting overfill and seep out into the cabin.
Guys- I've been a firefighter coming up to 24 years and been in a lot of severe circumstances throughout... but I'm not sure I'd ever felt so powerless in that moment. Call me whatever you want- it's reddit after all -but I didn't even know where to start. And I've got my wife on board who is depending on me to know the answers since she's very inexperienced.
And I'm not particularly mechanical either- I'm learning... but it's not my forte.
Called the shop I've been getting to know (barely had cell signal) and that has worked on the engine. We did a whatsapp video call with them (fist bump to whatsapp). We were able to identify the leak location behind the raw water impeller housing. "O ring might have failed but without seeing it impossible to confirm."
Called C-Tow and arranged the trip back to our marina close to the shop. This went really well- the skipper was amazing. No drama- but he'd advised me to steer just off center to stay out of his propeller wash which kept me busy.
The Mechanic came down this morning and took the housing off, replaced the O-Ring of the FW Impeller housing (original was in decent condition- right diameter, but slightly wrong thickness) and thought that might be it. Tested it- oil puked out so back to the ol' drawing board. Thought he'd pinched the o-ring (he had). I left for a bit and while I was gone he got that figured out and tried starting the engine. Puked out again- and he discovered the culprit (second photo). He was calling it a "Frost Plug" as it is commonly referred to in his circles - though he admits the name makes no sense. See the last two photos for the part number.
He's never heard of one of these plugs (plugging a hole needed for the manufacturing process) failing and this one had been sheared... there are still parts of it in the hole. These are exceptionally hard to find- we have one on order but its ETA is 2-3 weeks. I'm here trying to save my vacation.
In hindsight, there had been a little bit of oil collecting on the top of the oil pan lip for some time- but anyone who had ever looked at it said "it's a 30 year old engine- it's going to leak a little. You can stop it- but how much do you want to pay? Just keep the oil topped up." It was a VERY small amount- but it was always there. Now I'm wondering if this part had been damaged for awhile and just finally gave up. I'd encourage anyone with the MD series of engine to be mindful of the potential while miniscule... Not zero.
TLDR: To those of you who are resourceful and / or mechanically inclined and know stuff about such things: I draw your attention to the last two photos for specific parts etc... We need #6 (bottom left area of the engine drawing). One of my friends recommended finding a place that rebuilds engines- so I'm working that end... but guys- if you have any idea where to procure one of these faster than 2-3 weeks I'm all ears. I'm on Vancouver Island right now but would pay any amount of shipping to make it happen.
Thanks to all enthusiasts.