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  1. #1

    Default 73 Chrysler 318 rebuild

    hello, Recently purchased a 73 Uniflite with twin 318's , both need work,
    here is what I noticed so far,
    both are soft seized and have gotten them to move
    the Starboard engine appears to be fine, with the exception of the timing cover which is rusted on the left side and the metal is gone, so,,,,,,,,,,,,,,,
    the Port, has a milk shake in the oil,
    paragon , transmissions,

    my intentions are to remove both and rebuild, I am a retired technician and dont see a problem,
    I have done a few SBC's but no Chryslers
    any advice would be appreciated,
    also which is the standard engine and which is the counter rotating,
    thanks in advance,

    Bill

  2. #2
    Join Date
    Mar 2009
    Location
    Portland, Oregon,
    Posts
    11,246

    Default Re: 73 Chrysler 318 rebuild

    Bill, if these have been Raw Water cooled for their entire life, do not spend a dime on the over-haul. You will have interior rust scale that has not adhered to any rules nor pattern.

    Instead, pick up a pair of 360 (not 318) automotive cores for your rebuilds.
    No one has ever complained about having more available torque and horse power!

    The Chrysler cylinder heads incorporate a wedge shaped combustion chamber and a quench surface.
    Take advantage of the quench surface by using the correct piston profile in your rebuild.

    Here's an older thread regarding the 360 over-haul and taking advantage of the quench effect.

    http://www.marineengine.com/boat-for...y-engine-build


    As for Std LH rotation and RH Reverse rotation:

    If straight shaft drives, the Starboard engine is typically the RH Reverse rotation engine.
    If V drives, the Port engine may be your RH Reverse rotation engine.

    If someone had installed transmissions that are "opposite of engine rotation" capable, then both engines may be Std LH Rotation.

    If you can bump them over via the starter motor, you will see which is which.

    Engine rotation is determined by viewing the flywheel end...... not by viewing the front end!

    CCW rotation = Std LH
    CW rotation = Rev RH
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Rick ... aka Ricardo..... AQ series Volvo Penta repair
    Portland, Oregon
    28' SDN F/B w/ twin Volvo Penta 5.7L DP drives

    "Intellectual growth should commence at birth and cease only at death." Albert Einstein

    Please... no PMs! Post your questions on the forum.

  3. #3

    Default Re: 73 Chrysler 318 rebuild

    all great info, thanks very much,
    Ill keep the block advice when i get them apart,
    I didn't plan on replacing the block , as I was under the impression, there was not a lot of hours on these, but good to know,
    I have rebuilt a few small block chevys that were raw cooled, and have not had an issue, of course if there no good , there no good. I am a little concerned finding affordable exhaust manifolds, as the ones that I have seen are expensive,,

  4. #4

    Default Re: 73 Chrysler 318 rebuild

    Also I forgot to mention, that the boat spent if not all, most of its life on the great lakes, boat is from Ohio, so here in Fla it will be its first splash to salt water,
    if that matters,,lol

  5. #5

    Default Re: 73 Chrysler 318 rebuild

    the boat

  6. #6
    Join Date
    Mar 2009
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    Default Re: 73 Chrysler 318 rebuild

    .................
    Quote Originally Posted by Rhoda Mae View Post
    all great info, thanks very much,
    Ill keep the block advice when i get them apart,
    I didn't plan on replacing the block , as I was under the impression, there was not a lot of hours on these, but good to know,
    I have rebuilt a few small block chevys that were raw cooled, and have not had an issue, of course if there no good , there no good.
    I am a little concerned finding affordable exhaust manifolds, as the ones that I have seen are expensive,,
    Have you considered going with the GM SBCs?
    Your Paragon transmissions use the Borg Warner pattern flywheel covers.
    Borg Warner is readily available for the SBC engines.


    Also I forgot to mention, that the boat spent if not all, most of its life on the great lakes, boat is from Ohio, so here in Fla it will be its first splash to salt water,
    if that matters,,lol
    Rust/Corrosion (raw water cooled engine) exits whether river/lake water or ocean water. Of course the salt water corrosion is much worse.

    Run time hours mean very little. It's Father Time that causes the issue.
    As said, the rust/corrosion takes no certain path. It can be severe in one area, and not so bad in another area.

    Years ago, I took a previously RWC Ford 5.8L cylinder block in for a first over bore. After successfully boring a few cylinders, the boring bare popped though one of the cylinder walls. I ended up using an automotive core.

    The automotive cores have seen Ethylene Glycol only.

    Your call on that!
    Rick ... aka Ricardo..... AQ series Volvo Penta repair
    Portland, Oregon
    28' SDN F/B w/ twin Volvo Penta 5.7L DP drives

    "Intellectual growth should commence at birth and cease only at death." Albert Einstein

    Please... no PMs! Post your questions on the forum.

  7. #7

    Default Re: 73 Chrysler 318 rebuild

    I have a lot of horror stories myself, regarding things like that , I will do what I have to , to have a successful rebuild, if in question , it gets replaced,
    thanks for your great advice, I always listen to reason, lets face it, its truly a labor of love, or non of us would own boats,,lol

  8. #8
    Join Date
    Dec 2014
    Location
    Ontario Canada
    Posts
    74

    Default Re: 73 Chrysler 318 rebuild

    In my 1972 31' sport sedan with twin 318s and Paragon Vee Drives, the port engine is standard rotation, and the starboard engine is reverse rotation. Another way to

    tell is by looking at the distributors. The reverse rotation engine distributor will have a 3/4" spacer under it like the one in this picture.
    Click image for larger version. 

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    Last edited by Toonl; 07-14-2019 at 06:03 PM.

  9. #9

    Default Re: 73 Chrysler 318 rebuild

    Oh cool, didnt know that, thanks so much for that info, Ill check in a few,,lol
    and reverse rotation is in what direction looking from the rear,

  10. #10

    Default Re: 73 Chrysler 318 rebuild

    great info thanks

  11. #11

    Default Re: 73 Chrysler 318 rebuild

    hey guys , unrelated question, how do I post pics here, I go to the icon above and go through the procedure, but nothing happens,

  12. #12
    Join Date
    Dec 2014
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    Default Re: 73 Chrysler 318 rebuild

    Clockwise

  13. #13
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    Mar 2009
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    Default Re: 73 Chrysler 318 rebuild

    Quote Originally Posted by Rhoda Mae View Post
    .....................
    and reverse rotation is in what direction looking from the rear,
    All engine rotation (car, truck, aircraft, marine, industrial, etc ) is determined by viewing from the flywheel end.
    Std LH Rotation = CCW
    Rev RH Rotation = CW


    In addition to all components that are Rev Rotation specific, the front and rear main seals are also Rev RH specific.



    .
    Last edited by RicardoMarine; 07-15-2019 at 07:14 AM.
    Rick ... aka Ricardo..... AQ series Volvo Penta repair
    Portland, Oregon
    28' SDN F/B w/ twin Volvo Penta 5.7L DP drives

    "Intellectual growth should commence at birth and cease only at death." Albert Einstein

    Please... no PMs! Post your questions on the forum.

  14. #14

    Default Re: 73 Chrysler 318 rebuild

    thanks , just making sure that there are no differences considering Chevy, Chrysler , differences.

  15. #15
    Join Date
    Dec 2014
    Location
    Ontario Canada
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    Default Re: 73 Chrysler 318 rebuild

    If you have gone through the steps correctly then it's likely that your file size is too large. I'm not 100% sure but I think the cut off for this site is around 1MB. There may be other ways, but I insert my picture into a Word document and then compress the picture
    to E-Mail size (96 ppi) which once saved again as a picture,
    makes it compatible for this forum.

  16. #16
    Join Date
    Nov 2005
    Location
    Chi West, IL, USA
    Posts
    842

    Default Re: 73 Chrysler 318 rebuild

    Be aware there are differences between the 318 and 360 blocks (aside from bore/stroke) you'll encounter should you go that route.

  17. #17

    Default Re: 73 Chrysler 318 rebuild

    I dont plan on it, but thanks,,,

  18. #18
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    Mar 2009
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    Default Re: 73 Chrysler 318 rebuild

    No one ever complains about too much torque or horse power. I would go with a pair of automotive 360 cores!
    Rick ... aka Ricardo..... AQ series Volvo Penta repair
    Portland, Oregon
    28' SDN F/B w/ twin Volvo Penta 5.7L DP drives

    "Intellectual growth should commence at birth and cease only at death." Albert Einstein

    Please... no PMs! Post your questions on the forum.

  19. #19

    Default Re: 73 Chrysler 318 rebuild

    good to know,,,!! thanks however I am on a budget, and although there would be a lot of different things I could do to "get more power" Im fine just repairing whats in the boat, within reason, If money were not a factor, I would be talking to a rep from Yanmar and installing matching diesels,
    but sadly Im not a rich man

  20. #20
    Join Date
    Nov 2005
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    Chi West, IL, USA
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    Default Re: 73 Chrysler 318 rebuild

    Here's some help for your budget............
    https://www.manualslib.com/manual/10...er-Lm-318.html

  21. #21
    Join Date
    Jun 2008
    Location
    Island Heights, NJ,
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    Default Re: 73 Chrysler 318 rebuild

    Quote Originally Posted by Toonl View Post
    If you have gone through the steps correctly then it's likely that your file size is too large. I'm not 100% sure but I think the cut off for this site is around 1MB. There may be other ways, but I insert my picture into a Word document and then compress the picture
    to E-Mail size (96 ppi) which once saved again as a picture,
    makes it compatible for this forum.
    I use "Paint" ( part of all Microsoft Operating System Utilities) to Open the desired file, and then use the "Resize" button to resize it "by percentage". You can also use "Paint" to crop the picture to present a better view. I usually save the file in .jpg format.
    Capt Bob
    1969 23ft ChrisCraft Lancer
    Merc 5.7L 260HP/ Volvo 280

  22. #22
    Join Date
    Mar 2009
    Location
    Portland, Oregon,
    Posts
    11,246

    Default Re: 73 Chrysler 318 rebuild

    Please re-read my second paragraph in post #6 regarding over-hauling a previously Raw Water cooled engine.

    What if:
    ...... you have these cylinder blocks bored first over.
    ...... due to internal rust/corrosion damage, the boring bar was only a few thousandths away from cutting though a cylinder wall.
    ...... you now have these engines re-assembled and installed in the boat.
    ...... you are now out for the break-in period and a cylinder wall ruptures.


    Perhaps read this article, and make sure that your machine shop has this capability.
    http://www.gallowayengines.com.au/ultrasonic-testing

    Rick ... aka Ricardo..... AQ series Volvo Penta repair
    Portland, Oregon
    28' SDN F/B w/ twin Volvo Penta 5.7L DP drives

    "Intellectual growth should commence at birth and cease only at death." Albert Einstein

    Please... no PMs! Post your questions on the forum.

  23. #23
    Join Date
    Jun 2008
    Location
    Island Heights, NJ,
    Posts
    3,117

    Default Re: 73 Chrysler 318 rebuild

    Quote Originally Posted by RicardoMarine View Post
    Please re-read my second paragraph in post #6 regarding over-hauling a previously Raw Water cooled engine.

    What if:
    ...... you have these cylinder blocks bored first over.
    ...... due to internal rust/corrosion damage, the boring bar was only a few thousandths away from cutting though a cylinder wall.
    ...... you now have these engines re-assembled and installed in the boat.
    ...... you are now out for the break-in period and a cylinder wall ruptures.


    Perhaps read this article, and make sure that your machine shop has this capability.
    http://www.gallowayengines.com.au/ultrasonic-testing

    And its not just the wall thickness in the bores. I know of at least three cases with well maintained raw water cooled engines, where a section of outside wall of the block, just fell out.
    Capt Bob
    1969 23ft ChrisCraft Lancer
    Merc 5.7L 260HP/ Volvo 280

  24. #24

    Default Re: 73 Chrysler 318 rebuild

    thanks
    Last edited by Rhoda Mae; 07-17-2019 at 10:39 AM.

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