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Old 09-11-2012, 02:16 AM   #1
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Default 94 2400scr 5.7

I bought this boat knowing that the eng was frozen. The eng only has 100hrs. The boat is in really good shape, a few things here and there that will need fixed but, I really like doing eng work and it will keep be busy and out of trouble..LOL I hope to save the block, and maybe the heads if they are not cracked and rebuild it. I am thinking that the bearings are spun. If its not too bad I'll have the crank turned, but depends on how bad it all is.

The story goes that while docking the boat the eng started sputtering and then froze up.
and the tear down beings. so far I have the intake and Port valve cover removed.
You can see where some of the water got in the engine. Wonít be able to remove the heads till wed night.


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Old 09-13-2012, 01:08 PM   #2
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Pulled the Port Head off last night and found the problem. Pictures say it all... ;( , Not only is the piston beat up but there is a crack in the cylinder.

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Damn shame that this eng is ruined because of FOD. The Tool was left in the eng from the last over haul 100 hours ago.

Todd
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Old 09-13-2012, 04:54 PM   #3
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Other than obvious problem, that engine looks good. What is the tool that was sitting on top of the piston? I can't tell what it is.
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Old 09-13-2012, 05:53 PM   #4
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Its a Torx Bit. Yes everything except the Block and that one piston is in great shape
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Old 09-17-2012, 03:25 PM   #5
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Well that's a bummer Todd.

Do you have a line on a short block or bare block? How does that cylinder head chamber look?

Dan
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Old 09-17-2012, 03:51 PM   #6
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The heads are in great shape, only one very small nick, blended it out with emery cloth and all is good. A friend of mine has a complete eng (almost) that I'm going to install as soon as I can get the trailer all fixed , Had to replace the entire brake system on it. The eng is older model but Fresh rebuild. the new eng is only 2 barrel and my 4 barrel has the 4 middle bolts that go stright down. I think I have found one but haven't seen it yet. Using my Alt, Power steering Pump..etc

Todd
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Old 09-17-2012, 05:04 PM   #7
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Hey Todd, let me know if you go with the 2bbl motor as I might be interested in buying that 4bbl manifoild and carb if you wanted to sell it. I have a 96 5.7 2bbl and would love to upgrade if the price and timing is right (meaning if the wife will let me spend some more money on this thing) :-)
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Old 09-19-2012, 06:11 PM   #8
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Looks like I'm going to get a short block from a very good friend. Taking it to the Machine shop for a good look see to make sure everything is good. Getting a gasket set from http://www.michiganmotorz.com/felpro...795-p-377.html for $158.95 plus shipping Local Marina wanted $404.50 for the same "Mercruiser set". Transplanting all the accessories from the old engine (Sorry mcoffey) Looking at 2 days (pluss a case of beer) work. LOL Once I get the short block back from the machine shop.

Todd
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Old 09-21-2012, 06:11 PM   #9
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Here's the Short Block I'm going to rebuild. This weekend is Cleaning, measuring and inspection to make sure enerything is in Spec.

[ATTACH][/ATTACH]



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Old 09-25-2012, 10:26 PM   #10
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After cleaning the short block I took to a machine shop and they found a 4" crack on the side. The shop also specializes in mercruisers. They will sell me a rebuilt short block for $900. Sooooo next month I will buy it ...


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