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Copying a 31 Bertram in Quepos Costa Rica

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Copying a 31 Bertram in Quepos Costa Rica

Old 03-14-2019, 04:04 PM
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You can hang a picture of a Detroit Diesel on the wall and the pic will leak oil
Awesome engines though
Best sound ever!!
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Old 03-14-2019, 04:11 PM
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Originally Posted by Captainbadfinger View Post
You can hang a picture of a Detroit Diesel on the wall and the pic will leak oil
Awesome engines though
Best sound ever!!
It’s a built in, anti coorosion system. Works very well.
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Old 03-14-2019, 04:17 PM
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The AirSep system works well for Detroit two cycle engines, pretty much stops any leaks.
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Old 03-14-2019, 04:20 PM
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Originally Posted by alacrity View Post
this is hilarious. sounds like you would know this specific fix from experience. certainly it is not in the manual.
I cannot confirm nor deny this haha.

In all seriousness though we purposely misadjusted the racks on a 8v92 in my diesel tech school so we knew what it was. And our teacher was a wizard with those two strokes. He always told us to keep a clipboard or phone book or chunk of plywood handy in case of an event. I always kept up the habit, especially with the Detroit’s. The blower seals can fail on these things and they run off the engine oil until it runs out, then they require a lot of money to make them run again.

I also had had a bad compressor side seal on a reman turbo, and that sucker starting SINGING. My boss started panicking, I slapped the clipboard on the intake, motor stopped.
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Old 03-14-2019, 04:44 PM
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So when do you restart the original boat in the thread? Inquiring minds want to know! Love the orange BTW!
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Old 03-14-2019, 05:06 PM
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Originally Posted by c1steve View Post
The AirSep system works well for Detroit two cycle engines, pretty much stops any leaks.
Not from the exhaust manifolds
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Old 03-14-2019, 10:53 PM
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Originally Posted by c1steve View Post
The AirSep system works well for Detroit two cycle engines, pretty much stops any leaks.
I'll have to look into this. We don't have too much oil leaking yet . I guess we are just getting started though. The runaway thing is scary, they have the emergency kill lever though. I have the manual to help me adjust, but I'll keep something to put over the turbo too. I heard that destroys the blower...
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Old 03-14-2019, 10:54 PM
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Originally Posted by cman55 View Post
So when do you restart the original boat in the thread? Inquiring minds want to know! Love the orange BTW!
gonna be a while, I'm worn out and broke..
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Old 03-14-2019, 10:55 PM
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Originally Posted by c1steve View Post
https://www.toolsource.com/misc-c-31...-p-242206.html
Double check this in the manual, but pretty sure this is the one.
Wow, I bought the last one. Hope that's not the last one ever...
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Old 03-15-2019, 07:57 AM
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When timing the injectors and adjusting the valves, use the sequence shown in the manual. All the injectors on one side are linked together on a linkage rod. You have to make sure that you use a light adjustment/touch so that subsequent adjusted injectors are not too tight and move the linkage rod. If that happens, the first injectors on that side will be out of adjustment. When one bank is done, use the same light touch on the crossover linkage rod.

Sounds complicated, but is not. Take your time and it is easy. When all are done, double check then triple check the lock nuts on the injectors and the valves. Probably best to change the valve cover gaskets as well. They can be reused, but your gaskets are probably old and stiff. Check the sides of the injectors for the injector size, probably will be N90's which are highest power.

s
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Old 03-15-2019, 08:08 AM
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Originally Posted by c1steve View Post
When timing the injectors and adjusting the valves, use the sequence shown in the manual. All the injectors on one side are linked together on a linkage rod. You have to make sure that you use a light adjustment/touch so that subsequent adjusted injectors are not too tight and move the linkage rod. If that happens, the first injectors on that side will be out of adjustment. When one bank is done, use the same light touch on the crossover linkage rod.

Sounds complicated, but is not. Take your time and it is easy. When all are done, double check then triple check the lock nuts on the injectors and the valves. Probably best to change the valve cover gaskets as well. They can be reused, but your gaskets are probably old and stiff. Check the sides of the injectors for the injector size, probably will be N90's which are highest power.

s
I know it's not the same, but I adjust the valves on the cummins all the time. Sounds similar kind of. I usually go through and check everything after all is tight. I don't know if I am able to do that here, but that is the plan. I bought the adjust tool, as soon as it gets in I'll post some pictures. Are all the 6-71 valve covers the same?
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Old 03-15-2019, 08:52 AM
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Detroits are pretty much indestructible. I worked in the maintenance shop for a private fleet of busses when I was in college. We had ~80 or so busses total and 20 of them were ancient Bluebird pushers with detroits. One of the student mechanics forgot to refill the engine with oil during routine maintenance, pulled it out of the shop and made it half way across the parking lot before the engine locked up. It took three of the largest human beings I've ever seen hanging on a 1" breaker bar to unlock the motor but after it was filled with oil it ran like a top with no further issues.
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Old 03-15-2019, 09:22 AM
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Originally Posted by Sharpest View Post
Detroits are pretty much indestructible. I worked in the maintenance shop for a private fleet of busses when I was in college. We had ~80 or so busses total and 20 of them were ancient Bluebird pushers with detroits. One of the student mechanics forgot to refill the engine with oil during routine maintenance, pulled it out of the shop and made it half way across the parking lot before the engine locked up. It took three of the largest human beings I've ever seen hanging on a 1" breaker bar to unlock the motor but after it was filled with oil it ran like a top with no further issues.
Didn't they use these motors or a variant of them in the WWII tanks?
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Old 03-15-2019, 09:32 AM
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Originally Posted by maxie View Post
Didn't they use these motors or a variant of them in the WWII tanks?
A few of them. Most M4s and M26s were gas powered, but a few were built with diesels
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Old 03-15-2019, 10:21 AM
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The old 2 stroke saying was "power on every stroke".
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Old 03-15-2019, 11:59 AM
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Originally Posted by jeepers View Post
The old 2 stroke saying was "power on every stroke".
hey thats my motto for my pecker
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Old 03-15-2019, 12:24 PM
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LoL. Heard of cummins, detroit, mann, deere, etc.
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Old 03-15-2019, 07:20 PM
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Originally Posted by kawakx125 View Post
hey thats my motto for my pecker
that is some funny shit right there!! I think I will (slip it In) use it when ever I can. Rag’s
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Old 03-15-2019, 08:55 PM
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I vote to name her Naranja - if and when you go though the painstaking process. Great Job sir! good luck with her!
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Old 03-16-2019, 06:11 AM
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Originally Posted by maxie View Post
Didn't they use these motors or a variant of them in the WWII tanks?
I think a lot of the WWII landing craft were powered by 53's.
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