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Go Back   SailNet Community > General Interest Forums > Gear & Maintenance > Engines > Diesel
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Diesel This is a new forum dedicated to diesel engines and their applicable accessories.


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Old 04-18-2010
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Removing Engine

I have an MD7A that I am removing from the boat to do some work on. Anyway, the last connection I need to break is between the transmission and the shaft. I figure I can either try and turn the 2 square headed bolts or perhaps remove the coupling (with four bolts) from the transmission? Anyone done something like this before?

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Old 04-18-2010
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remove the coupling. Take care to lubricate those bolts well, clean the holes well before inserting the correct six- point bit, and be judicious with torque when attempting to remove them- the are easy to strip.
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Old 04-18-2010
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It will be easier to unbolt the coupling from the transmission. Trying to take the coupling off of the shaft while attached to the engine would not be very easy. From the picture it looks like hitting the bolts with penetrating oil once or twice a day for a week might make the process a lot less painful. That does assume that you are not in a big rush.
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Old 04-18-2010
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I have done this, agree with the advice above. I treated those rusty bolts with Kroil all winter. In the spring they unbolted with ease. Some like PB Blaster.
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Thanks all,

They came out with no problem. I thought they were going to give me quite a battle. That and I still have skin on 9 out of 10 knuckles.
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Old 04-21-2010
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cardiacpaul is a jewel in the rough cardiacpaul is a jewel in the rough cardiacpaul is a jewel in the rough
Titan,
You win!...
grab yourself some grade 8's - for bolt head strength... or (if you wanna go all goofy, totallystainless. com has them in grade 8.) and a 4 oz can of never seez, available @ any decent autoparts store. Use "never seez" on reassembly for anything you might want to take apart again. (careful, once you put the can in the car for the ride home, that stuff is ALL OVER you.) slobber it on the new bolts and congratulate yourself with an adult beverage.
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Old 05-04-2010
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Locktite make a product that suppsedly freezes and unlocks rusty bolts
I have not had one success in about 50 trys
Waste of money
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Old 05-04-2010
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Quote:
Originally Posted by cardiacpaul View Post
We are not primarily on earth to see through one another, but to see one another through
Jeez you must must be a soft touch if you believe that . In my world its every poster for himself .....almost there , can go do another post on crimpers which is where I really want to be
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