318 marine engine.

Small Block Mopar Engine

  1. moparfan68

    moparfan68 Well-Known Member

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    I found a 318 marine engine complete from carb to oil pan. Still has trans or pump still attached to it. I can get it pretty cheap just wondering if it's worth getting ?is there any value or should I just leave it alone. Thanks in advance
     
  2. Garrett Ellison

    Garrett Ellison Amateur driver on public roadway, do not imitate.. FABO Gold Member

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    What year is it? Some of these had a factory four barrel single plane iron intake that would make it worthwhile, and it might be a good way to get into a four lug mount block with thick cylinder walls and a steel crank. It would definitely be worth investigating closer.
     
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    • jimjimjimmy

      jimjimjimmy lobsterman FABO Gold Member

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      There are standard rotation and reverse rotation versions. A reverse rotation would not be great for a vehicle .
       
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      • RustyRatRod

        RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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        Most single engine boats had reverse rotation engines. If it came off a dual engine boat, it could be a clockwise rotation engine. I would get it either way. A crank kit is all it will take to remedy that....and of course whatever camshaft you want. Some of them had unusual gear drives for the camshaft, but once removed, the blocks are the same as far as bolt on accessories. I have never heard anything about them being thicker, but that's certainly plausible, since marine engines and parts are more heavy duty than their automotive counterparts.
         
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        • Wyrmrider

          Wyrmrider Well-Known Member

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          obviously check for rust
          and check block- if run cold in salt water they can be full of salt crust
          both standard and reverse cams are still available
          you might be able to flip it to the boat crowd
          good motor
           
        • MOPAROFFICIAL

          MOPAROFFICIAL Well-Known Member

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          The cranks rear seal surface will have diverter grooves in the wrong direction because it is reverse rotation ...so in a car, standard rotation...it may piss oil out the rear main.

          The thing I'd look for are the water cross over style head, they're closed chamber. Last digits are 234 of the casting number.
           
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          • toolmanmike

            toolmanmike FABO Staff Staff Member FABO Gold Member

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            A 318? They are quite easy to come by. I would'nt mess with a marine teen.
             
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            • MOPAROFFICIAL

              MOPAROFFICIAL Well-Known Member

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              Especially if you're over the age of 18...

              :D
               
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              • Dana67Dart

                Dana67Dart Like a fine wine, only getting better with age! FABO Gold Member

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                Slightly off topic but I have a question...

                67 318 vs 67 273 vs 69 318..

                am I correct that the 67 318 and the 69 318 do not have interchangeable parts like a 67 273 and a 69 318 more or less do. ( hope this makes sense)
                 
              • RustyRatRod

                RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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                BWHAHAHAHAHAHA!
                 
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                • AJ/FormS

                  AJ/FormS 68 B'cuda fb, Form S clone ... 367/A833/3.55s FABO Gold Member

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                  IDK but the pistons will be bore specific,lol.
                  Cranks are piston specific,
                  And pop-up pistons do not play well with closed chamber heads.
                  Early models had lightweight rods, while smog era teens used 340 type rods but with pressed pins..
                  Otherwise from 67 on,almost anything goes.
                  The 69 318 was a high-compression 9.something engine; 9.4 I think.
                  If you are building a performance engine, it doesn't really matter, cuz you are gonna be replacing almost everything anyway. And if doing a stock rebuild, from a core, it still doesn't matter.
                  The only fly in the ointment is the early 273 heads (65 and older) with the small odd-angle intake-bolts.
                  That's all I know.
                   
                  Last edited: Sep 13, 2019
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                  • moparfan68

                    moparfan68 Well-Known Member

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                    It's a 72 block it's a 4bbl with a carter carb still on it. I can get it for 100 to 150 for whole motor but I didn't k ow if it would be worth it or should I just let it get crushed. I'm goin back in the morning to get some parts off a mid 80s w250 truck that was brought in. When I was lookin at the w250 a guy workin in there stopped to talk to me and said if I like mopar stuff I should look at this "big block 442 they had" I said hech yeah I've never seen one before. Lol. it ended up being a 318 marine motor.
                     
                    Last edited: Sep 14, 2019
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                    • moparfan68

                      moparfan68 Well-Known Member

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                      The 234 heads can they be used in a car or just marine application. Do they have any value ?
                       
                    • Daves69

                      Daves69 FABO Gold Member FABO Gold Member

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                      Does it have the ID plate on it?

                      upload_2019-9-14_8-4-31.png
                       
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                      • MOPAROFFICIAL

                        MOPAROFFICIAL Well-Known Member

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                        You can use them in a car, but I recommend you block the water/heat cross over though.
                        Use .019-.021 thick steel and copper rtv.
                        Otherwise water will flow through the manifold. Some who have egr ,its a must or your motor will eat coolant... but non egr is no worries. But the trick is too plug them, pipe plug on the block side would be nice.
                        The exhaust ports are blind due to the water heated deal and so they all flow even with no end gas passed around to the other bank...which is why they're the most desirable 318 closed chamber head imo.
                         
                        Last edited: Sep 16, 2019
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                        • halifaxhops

                          halifaxhops It's going to get stupid around here! FABO Gold Member

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                          I run a 440 that was reverse rotation, just need the oil pan and cam and distributor only. And you have to polish the crank seal areas also.
                           
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                          • toolmanmike

                            toolmanmike FABO Staff Staff Member FABO Gold Member

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                            How many 318's do you want for $100-$150? Why pay the price to toss away a lot of marine pieces you can't use. (unless you're building a boat)
                             
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                            • moparfan68

                              moparfan68 Well-Known Member

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                              If the marine motors or there parts had any value I would buy it if not i will just let it set.
                               
                            • jas0162

                              jas0162 Well-Known Member

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                              I run an industrial 318 in my daily driver, it had very low miles so I changed the pan and water pump housing and threw it in the dart. It has the water crossover heads and they are great, seems to keep the carb an even temperature even on the hottest days.
                               
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                              • moparfan68

                                moparfan68 Well-Known Member

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                                • Daves69

                                  Daves69 FABO Gold Member FABO Gold Member

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                                  Specs are same for '73...…….
                                  upload_2019-9-14_9-41-17.png
                                   
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                                  • halifaxhops

                                    halifaxhops It's going to get stupid around here! FABO Gold Member

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                                    Look on e bay for the parts value think I sold the cast oil pan over 200 and a revers distrib is 100 easily. Exhaust manifolds are big money also on them.
                                     
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                                    • moparfan68

                                      moparfan68 Well-Known Member

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                                      Once I got to scrap yard and looked it over it was obvious it had sit for awhile lots of rust. The exhaust manifolds looked like they had froze and cracked. I pulled distributor and a few parts and left the rest.i got quite a few parts off 88 w250 too while I was there.
                                       
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                                      • moparfan68

                                        moparfan68 Well-Known Member

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                                        Would you be interested in these Distributors?

                                        15687675510676588572304107802865.jpg

                                        15687675657431735552256141516223.jpg
                                         
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