$6,600 to rebuild Atomic 4? replace/rebuild - Page 4 - SailNet Community
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post #31 of 64 Old 02-17-2013
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Re: $6,600 to rebuild Atomic 4? replace/rebuild

We would most likely agree in person but over the Internet so many parts of somebodys thought process is missing

On my boat just getting the motor out

I had to design a tool to reach the bolt heads under the fiberglass engine bed and the time just went UP from there

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post #32 of 64 Old 02-17-2013
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Re: $6,600 to rebuild Atomic 4? replace/rebuild

Another thing to consider in this decision is. How are you going to use the boat? A tired functioning A-4 is just fine if only needed to get you out of the slip and into open water. Whole different thing if you plan to go to the Bahamas. Dan S/V Marian Claire
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post #33 of 64 Old 02-18-2013
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Re: $6,600 to rebuild Atomic 4? replace/rebuild

I have an A4 replacement candidate for you at a reasonable price. Contact me at 5188346041 Al Frakes Port Kent, NY
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post #34 of 64 Old 02-22-2013
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Re: $6,600 to rebuild Atomic 4? replace/rebuild

A big consideration for me would be, what's the condition of the rest of the boat?

I wouldn't sink $6k into a boat that is falling apart. I'd get the engine running and sell as is. On the other hand, a new $10-12k diesel in a beautifully restored and maintained boat may well be an investment that can be (at least partially) recouped in three years time. I'm guessing you're somewhere in the middle, but depending on which end of the spectrum I was leaning toward, would partially guide my decision as to how much I'm willing to spend.
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post #35 of 64 Old 02-22-2013
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Re: $6,600 to rebuild Atomic 4? replace/rebuild

Hi everyone
My friend any auto shop will rebuild it for u , they rebuild engines , I also have spare out board on my boat ,9.5hp it gets me in and out with no problem , $6k is lot of money my friend, u will never get ur money back when u sell,
Good luck
Moe
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post #36 of 64 Old 02-23-2013 Thread Starter
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Re: $6,600 to rebuild Atomic 4? replace/rebuild

There is some great feedback here, thanks to everyone for the input! After reading these threads I've decided to explore the rebuild option myself. I'm good with a wrench, having tackled many auto engine jobs myself, and I think this option is at least worth exploring before I pull out the checkbook. I love the personal pride/knowledge that comes with a DIY project. Grasping the importance of a reliable motor out on the water, I anticipate many hours of research and labor in my future. I plan on meeting with the mechanic at the yard to get a better understanding of the problems...I used the motor all season, and while it occasionally had a rough start, I found it to run like a champ!

The Moyer website seems like a good place to start, and I know I can always rely on the forums to help clear up any questions.

Thanks again for all the input, I never expected such thorough feedback.

Wish me luck!

Chris
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post #37 of 64 Old 02-23-2013
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Re: $6,600 to rebuild Atomic 4? replace/rebuild

Good decision. You are going to get a lot of fun & satisfaction out of the project - a new engine will be a bonus.

If you haven't already, I strongly suggest you check out Porfin's thread about his ongoing rebuild of a Perkins 4108. Obviously the specific mechanical info will differ but there are lots of tips & tricks he is doing that will transfer to your Atomic Bomb.

Have fun, take lots of pictures and keep us posted.

I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.
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post #38 of 64 Old 02-23-2013
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Re: $6,600 to rebuild Atomic 4? replace/rebuild

We all wish you the best. If you need a kind word just ask. I think most of us will enjoy your accomplishment, share your pride along the way and when you finish. Keep us updated. Regards, Lou
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post #39 of 64 Old 03-31-2013 Thread Starter
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Re: $6,600 to rebuild Atomic 4? replace/rebuild

Well, its been a few weeks and I thought I'd give an update along with some pics...

I picked up the motor from the harbor, and it was already completely disassembled and housed in several plastic bins. After getting the run down from the lead mechanic, I brought the parts back to the basement of my girlfriends condo (I live in a 1 BR apt in Chicago, which is already cluttered enough with boat parts and tools...thanks Katie!).

,600 to rebuild Atomic 4? replace/rebuild-basement_sailnet.jpg
(Candid camera in the dungeon.)

I spent the first weekend going through the work order prepared by the yard, assessing the condition of the various components in question. The main items in need of replacement are: 1 connecting rod, full set of bearings, full gasket set, full set of valve springs, full piston rod set, thermostat, cam shaft grinding (which was already done by the mechanic at the yard), and I decided to have the main components (block, flywheel cover, etc...properly cleaned by a local motor shop).

,600 to rebuild Atomic 4? replace/rebuild-engine-9.jpg
(The block looks in need of a new paint job!)

,600 to rebuild Atomic 4? replace/rebuild-engine-10.jpg
(Exhaust Manifold and Valve Cover Plate.)

,600 to rebuild Atomic 4? replace/rebuild-engine-12.jpg
(The oil pan also could use a new coat of paint.)

After my inspection, I ordered the parts in question from MoyerMarine.com along with the Service and Overhaul Manual and some other basic tools from Amazon.com (piston ring compressor, engine brushes, degreaser, Permatex Form-a-Gasket, etc...). I plan on dropping off the block, flywheel cover, etc... at the engine shop tomorrow to have the old paint removed and the applicable components baked, acid washed (or glass blasted if appropriate) while I tinker with cleaning and oiling the misc. components such as the carburetor, ignition system, and oil pump.

,600 to rebuild Atomic 4? replace/rebuild-engine-8.jpg
(I examined the rods and pistons for damage. The bearing on one of the rods had begun to spin and was the main culprit in this rebuild...The mechanic explained that due to the spun bearing, the rod experienced compromising temperatures and needed to be replaced. I bought a used one off of him for $40 (top left).)

I've already started degreasing and cleaning the valves and lifters. Most of my today has been spent pouring over the Moyer Overhaul Manual. I've found this extremely helpful (along with some other great posts on this site).

Once I get the parts back from the engine shop, I can start to plan the reassembly.

One quick question: Before deciding on an engine shop, I called around looking form someone who can provide the correct services for the block, etc...and I received recommendations from other engine shops for the place I am ultimately going to work with. The shops owner suggested that we bake the block and perform an acid wash of some type to remove all the paint and gunk built up in the water jacket. The other components, he suggested, should be cleaned with a glass blasting (he said glass was less abrasive on the parts than sand). Do these treatments seem appropriate? I remember my father warning about the potential for pieces of the glass to get lodged in the "nooks and crannies" of the motor, ultimately causing problems down the road (he is rebuilding the motor of his 1968 Thunderbird). Is this something I should be wary of?

Well, that's all I have for now, apologies for the lengthy post. I'm always open to feedback/suggestions so don't hold back.

Happy Easter,

Chris

Last edited by simmonct; 04-01-2013 at 01:29 PM.
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post #40 of 64 Old 03-31-2013
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Re: $6,600 to rebuild Atomic 4? replace/rebuild

Glass beading works well - it won't harm machined surface. If they are going to bead the block, I'd get it hot tanked afterwards to ensure all the beads are out of it. If you are getting a set of rifle brushes, going through the oil galleys and so forth afterwards will really ensure it's all clean.

Read Porfin's thread on rebuilding his 4108 - lots of tips on painting the engine inside & out.

Get your rods resized and get the mains line honed as well - better bearing crush if you do and it doesn't cost much if you get it done along with the valve job. If you had a rod bearing spin you'll need to get the crank ground undersize as well. This is all standard engine building procedure.
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I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.

Last edited by SloopJonB; 04-27-2013 at 09:41 PM.
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atomic 4 , atomic 4 engine , c&c , diesel swap , engine rebuild

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