54' Bertram Tranny Removal

Hello there everyone!

I was wondering if anyone has ever tried backing off a ZF BW195 from a Detroit Diesel 12V71TI on a vintage Bertram, mid 80's? Mine is an 86.

The problem I am having is that my flywheel spins freely with a screw driver and does not spin the crank and everything else. I can turn the front of the motor with a pry bar and can see all the cylinders move up and down. Engine did not seize. Anyways, we all know the answer once I back off the tranny.

What I wanted to know is if it was possible to back it off with out lifting the engine first? The outside Motor mount bracket bolts(pic61) can not be removed unless I lift engine or I am just not see something here.

Your experiences are welcomed!

Thanks

I have spin Keno Wheels spin slower in Vegas with the same amount of effort.

Yes, the plan is to slide gear out, just trying to see if there is an easier way of sliding it out than to lift entire engine.

Thanks for your reply.

Thanks for the input. I can slide mine back but would have to disconnect the rear engine mounts and support engine at the rear.

I am hoping my problem can be solved with out taking down engine, but it has to come out, then My wife is going to start picking out the new interior. LOL

Whole Flywheel..

Yes, I already know.. Im waiting for the drumroll..........

I have been told that if bolts came off the cranks is still salvageable but the bolt holes will need to be redone. Has anyone heard anything negative on this?

I will post Pictures and finding after we unveil the issue. Going to give it a strong push tomorrow.

Yes, I know about special bolts and special tightening method. The bolts are suppose to stretch inside the threads of the crankshaft. Im not getting a warm and fuzzy with a helical repair, but might be worth a shot buffer complete rebuild.

Okay,

So here is the scoop. I took down the turbos.. yawn.. I took off exhaust and elbows. I took down Air boxes. Unbolted Coupler and pushed it as far back as it would travel. Unbolted rear mounts. Loosened front mounts. Broke open my Statics text book from my engineering college days and then we tore up the new carpet in salon. Moved furniture around to situate Cherry picker.

We first raised the engine up as high as it needed to go to unbolt the motor mounts bracket from the flywheel housing side. Then we supported the engine alone on the bottom of the hull at three points. We began to lift tranny until top nuts became stiff, then lowered and pulled them out. We pushed on the top tranny lip with a 30lb chisel like bar. It worked wonders. As the tranny came out we would adjust the height so it would not touch the coupler.

As soon as we could see the crank, it was GOOD NEWS! Crank end was intact and Bolts had all sheared. 4 of them had sheared a long time ago before I bought the boat. The two I had left went 1000 hrs. We were able to back off some of the sheared bolts already with out extraction tool. Will bring in professionals for final job. There is some wear n tear on the flywheel and we are having a machine shop take a look at it to see if its do able.

The crank looks pretty solid.. Nothing like 1980's made in the Good Ole USA steel...!!!!

Thanks for all your inputs. I hope to be up an running by the weekend.

Hit'm!,
CaptOz

Tranny Removal Pics

Here are some pics...

More Pics of Tranny removal

Im sure we have more but this is all I had on my phone.

Of course all the bolts will be new, since I have ZERO bolts left.. .LOL

The Flywheel looks like the through bolt holes are too damaged.. lets see what the shop says..

Here are the Bolts.. I just ordered them today from RPM Diesel in Ft. Lauderdale. I should have them tomorrow.