Marine Hemis

[Feral]

Some Marine Hemis have surface not too far away, I don't know the displacement of these engines I just know they're marine engines and they're hemis. One looks like it might be rebuildable, the other... eh... Scrap, but you never know.

Can someone give me a crash course on mopar marine engines? If these engines can be rebuilt for use in automobiles, I want them.

 

[nitrojunkie]

Hi, I assume that these are the 1st generation hemis? That is with the distributor on the rear of the motor? If so,the id numbers are on the front rail of the block right behind the water pump. You may have to clean the rail off pretty good to see them as they are stamped numbers and sometimes hard to see. I have a decode sheet here somewhere if I can find it and can decode the numbers for you. As far as parts you can get just about anything you need for them, of course they may be a little expensive but what parts for a hemi isn't expensive? Even the parts from the 'scrap' motor will be worth a little money if you cant rebuild it too. In other words don't throw the scrap motor away. If I can help just let me know. Bill

 

[Feral]

I can't get the numbers at the moment, but I'll contact the seller and ask if he can get them for me and I'll pass them along.

 

[snakeyes]

[video]http://www.hothemiheads.com/[/video][video]http://www.jalopyjournal.com/forum/showthread.php?t=441303[/video]

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[video]http://www.allpar.com/history/marine.html[/video]

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[video]http://www.marineengine.com/boat-forum/showthread.php?403157-Chrysler-Marine-426-Hemi[/video]

 

[Feral]

[video]http://www.jalopyjournal.com/forum/showthread.php?t=441303[/video]

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[video]http://www.allpar.com/history/marine.html[/video]

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[video]http://www.marineengine.com/boat-forum/showthread.php?403157-Chrysler-Marine-426-Hemi[/video]

thanks for the links!

I doubt it's a 426 Hemi, but how I wish it was! lol

 

[bigmanjbmopar]

Hemis is that like Humus? Oh youuuuu mean Hemi's OK lol

 

[Feral]

Hemis is that like Humus? Oh youuuuu mean Hemi's OK lol

Yes, I mean Hemi's. Sorry, I'm multi tasking here. Between talking with the seller, installing mods for a PC game and answering the phone! lol

 

[bigmanjbmopar]

lmao just messin wit ya man

 

[Mark B]

Yep that pic is of a first gen. Valve covers will probably be stamped Chrysler Marine.

 

[HEMI-ITIS]

Is the distributor in the front or the rear????????????

 

[Meep-Meep]

The first gen marine hemis usually had adjustable rockers and that is a plus for the racers. In the old days you can ID these engines by little bumps on the valve covers where the adjuster screw would need clearance, but these days someone could have put the marine valve covers on anything so best to pull them and look. I think the bumps are near the spark plug holes. Early hemis are also desirable to the rat rod guys.

 

[A383Wing]

more than likely, they are 331 Hemi's....common motor for marine use....be aware that some are reverse rotation, those you cannot use in a car

 

[72Fourspeed]

more than likely, they are 331 Hemi's....common motor for marine use....be aware that some are reverse rotation, those you cannot use in a car

You can use them if you change the camshaft. If those engines are 331,they are later 331 motors as they don't have the extension on the rear of the block. I think 54 is the later engine variance for them. They could be 354 or even 392 motors. Pretty motors when detailed, but parts are scarce.

 

[Meep-Meep]

What A383 might be getting at is the not so obvious feature that makes a reverse rotation engine work. The crank real main seal surface has little lines across the surface that are cut at an angle, and that angle depends on the rotation. The purpose of those lines is to provide some oil for the rope seal but the angle at which they are cut helps push some of the oil back into the engine - sort of an oil pump if you will. Running a reverse rotation marine crank in normal rotation will actually pump oil out of the engine and the result will be a never ending, annoying, rear main seal leak. Certainly you can set the crank up in a lathe and remove those lines and hopefully maintain enough diameter for the modern lip seal to still work.

 

[A383Wing]

correct...cranks & cams from a reverse rotation engine are useless in the automotive industry.

 

[snakeoil24]

Marine Hemis also had sumps under the crank for constant loss, used the oil to lube the disc interface. Pretty looking but a head ache to convert. Nice boat anchors. Blocks, head and valve covers look good, if not rotted out rat junk rod guys pay!

 

[72Fourspeed]

I stand corrected. I based my comment on the fact a friend years ago used a marine engine in a Ford pickup. I believe it was a 332 or 352. Thought the Hemi would run reversed. Oh well, been wrong before.

 

[Supershafts]

I've seen many a 392 in the marine world, if the boat is twin 392 one will be standard rotation. IF the boat is raw water cooled i'd leave it where it lays