How do you do an frame rebuild 12v71

[scottinsydney]

I am curious. I've seen lots of posts regarding rebuilt engines that were done in the boat. My question is how do they actually achieve it? How do they lift the heads off? How to get adequate access to the crankshaft underneath etc? I'm looking at the engine room on my 1984 61MY now and trying to visualise how it all might be done. How long might each section of work take to accomplish?

[Boatsb]

The pan drops and I believe is 2 sections. That's the power access.

The heads are heavy but come off. As does the rest of the top end.

It's a lot of work but the boat was designed for it.

[oceanjake]

On some boats the shaft must be disconnected and the rear half of the engine is jacked up to allow clearance to drop the pan and access bearings etc

[dottieshusband]

I have a jib crane and winch mounted in my ER. Makes removal of the 230lb head, Inter Cooler, and blowers a snap. Removal of the upper oil pan (130lbs), gives good access to the lower end. The Cam shafts slide out.

[scottinsydney]

I don't suppose you have photos of any or all of this?

[Boatsb]

No pics means it didn't happen

🤣