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  1. #466
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    Quote Originally Posted by Captain75 View Post
    The barrier you are supposed to add between the combustion chambers IOT prevent cooling water to pass. Supposed to be done when running open deck heads on a closed block.
    got it.

  2. #467
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    Kind of low tempo over here during the holidays, but some smaller details in place, like drilling and tappning the closed deck block to accept the open deck check valve:
    Click image for larger version. 

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    Btw does anyone know the difference between these to types of main bearings?
    Newer design?, better?
    Click image for larger version. 

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    Click image for larger version. 

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  3. #468
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    No ideas on the bearing differences?

  4. #469
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    I don't know for sure but probably just a different supplier, new ones look like the one with circles on the sides not the raised areas... A more solid cage edge may retain oil better..Dave

  5. #470
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    Quote Originally Posted by H2OPERF View Post
    I don't know for sure but probably just a different supplier, new ones look like the one with circles on the sides not the raised areas... A more solid cage edge may retain oil better..Dave
    Thanks for your reply and thoughts!

  6. #471
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    Any difference in roller size. I measured between Merc and ProMarine on rod roller and Merc was smaller. Shorter - .0165

  7. #472
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    Thanks, FMP!
    I’m on vacation on the Canary Islands, but I will check this when I get home to Sweden and post the result!

  8. #473
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    Here are the resultats. Sorry but my mic only shows mm.
    Click image for larger version. 

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  9. #474
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    The hunt for details prior reassembly continues...
    About the connecting rods; is it a good idea to polish the rod journals before reassembly? Like a slight hone creating som small scratches for the oil to stick to?
    A slight rub by hand with 400 wet paper?
    Click image for larger version. 

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    Greatful for your opinions and advice!
    //Anders

  10. #475
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    Yes, I always do anyway. I use a little 400 grit ball hone. By hand is fine too, just try to make cross hatches when doing it. Great thread btw.

  11. #476
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    Quote Originally Posted by Captain75 View Post
    Here are the resultats. Sorry but my mic only shows mm.
    Click image for larger version. 

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    Will you use the + 0.59mm?

  12. #477
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    Quote Originally Posted by FMP View Post
    Will you use the + 0.59mm?
    Haven’t decided yet. The wider cage with slightly smaller rollers seems more solid in your hand, so I might use them instead.

  13. #478
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    I decided on more roller surface instead.

  14. #479
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    Quote Originally Posted by FMP View Post
    I decided on more roller surface instead.
    Did you have the same parts/choice?

  15. #480
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    No , different applications, Merc part vs Pro Marine . Metal cages ,old x flow but the difference surprised me , made it note worthy. A bit extra running surface may help.

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