Boats For Sale:
rebuilding 351 W 1983 |
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gigem75 
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Joined: November-12-2005 Location: United States Status: Offline Points: 239 |
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 Topic: rebuilding 351 W 1983Posted: March-31-2006 at 9:19am |
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btw, total parts cost and machine shop labor was right at a grand maybe a little more, that's everything except a new alternator, starter, and water pump.
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gigem75
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Posted: March-31-2006 at 9:16am |
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I'm afraid it does. Seems there are as many opinions as there are teeth on a timing gear. Thanks for the info, the consensus seemed to be in favor of a LH crank working just fine in a RH app.
The piston to cylinder clearance is right in the middle of where the PleasureCraft manual says it should be. The rear main is not leaking and the engine is running strong so if an Aggie can do it anyone can:) |
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David F
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Joined: June-11-2004 Location: United States Status: Offline Points: 1770 |
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Posted: March-27-2006 at 8:03am |
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gigem75:
I guess your handle means your an Aggie. Well, this Longhorn once put a reverse rotation Chevy 350 together with a LH rotation automotive crank and had absolutely zero problems for many years. Boat sold to a friend and the engine ran strong for as hundreds of hours until I finally lost track of the friend and boat. So, I think you will have no worries. FWIW, the Chevy engines are super easy to make reverse rotation as all you do is use a gear set instead of a timing chain...thus camshaft, oil pump and distributor all turn as do a LH rotation engine. Then you just swap #1 and #8 plug wires to get it to run backwards...very simple. I would think that if the crank oil oils had the edges chamfered all around, then oil issues will not be a concern with an RH crank turning LH. |
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gigem75
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Posted: March-26-2006 at 7:49pm |
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I would like to thank everyone for the info so graciously shared, it helped a lot. 5 hrs on the new motor and running great, no oil leaks, strong and smooth.
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79nautique
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Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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Posted: March-14-2006 at 8:09am |
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Good luck
but I wouldn't be going to these places to get an engine either. Quote from the above web site "Some of our customers: NAPA, Car Quest, Cummins N.W., Mar Lack Automotive Dist., Republic Automotive (Alaska), Dr. Motorworx (national chain of installers), and many others... " |
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gigem75
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Posted: March-13-2006 at 7:05pm |
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http://www.hiperformer.com/ford-marines_boats-marine_engines-for_351wmlb_r.html
all I can tell you is that they do it for a living and guarentee their work and use automotive cranks all the time in reverse rotation marine applications. This is the link that was posted here that I found on this board and called them. I also called a rebuilder of marine engines in St. Pete Fla. where I got my marine gaskets and crank seals from and double checked with them and they told me the same thing. |
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79nautique
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Posted: March-07-2006 at 9:46am |
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Knock your self out just don't start crying if you have an oil leak or it doesn't last.
What is the name of the company your dealing with and where are they located? |
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gigem75
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Posted: March-07-2006 at 8:55am |
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I talked to them about what you said and they seem to have a different opinion. They use automotive cranks all the time and do NOT experience premature bearing failure. They seem to be a reputable outfit and sorry, I've got to go with them on this one, no offence but they do this for a living and maybe you do too but I don't know that and I do know they do. All I'm looking for is accurate information and I really have no preference who may have it so please don't be offended.
Technically they are right. btw, the flywheel on those is off a 302, manual trans, column 3 speed shift. |
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79nautique
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Posted: March-03-2006 at 10:56pm |
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Technacally they are right....
... the crank is the same dimensionally,... but the grind for the bearing journals and oil grooves are not, so if you use an automotive crank with a smooth rear main journal with the correct rotation rear main seal you won't have an issue with an oil leak, but you will have premature bearing failure if it's not a rev rotation crank, or ground correctly for the engine's rotation. |
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gigem75
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Posted: March-03-2006 at 1:01pm |
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From what I have found through asking marine engine rebuilders is that the cranks are the same. However if you have a crank with the serations on it they need to be polished off and then the standard rotation crankshaft will do fine.
http://www.hiperformer.com/ford-marines_boats-marine_engines-for_351wmlb_r.html the above link is the source of my information. have a rev rot, camshaft installed. rev rot, rear seal. |
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woodyelc
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Posted: March-01-2006 at 12:03pm |
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FYI, I HOPE YOU BOUGHT A REVERSE ROTATION MOTOR? THE CRANKSHAFT AND CAM ARE VERY DIFFERENT BETWEEN THE TWO MOTORS.
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woodyelc
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gigem75
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Posted: February-24-2006 at 6:23am |
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got it, thanks!
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SS-201
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Posted: February-24-2006 at 3:53am |
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2 PIECE SEALS IS A OLDER MOTOR BE SURE ITS OPPOSITE ROTATION ENDINE WITH PROPER SEALS.
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SS 201
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gigem75
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Posted: February-21-2006 at 7:47pm |
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I'm building a 351. The crank and bores were shot so I got a short block. Purchased the marine gasket set and the 2 piece real seal that came with the long block from auto parts store has the same part number on it and looks exactly like the 2 piece seal that came with the marine gasket set.
Any thoughts on that? Also the front timing chain cover has no room for dowels to line it up the the front seal. The block has bigger holes to accept dowels but just bolt holes on the front cover? How does the front cover line up so the front seal will seal? Any thoughts would be greatly appreciated. Thank you! |
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