Cummins Marine Diesel Repower Specialists Forums Cummins Marine Engines Rectorseal 5 on all engine hoses

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  • #18449

    Doug Patterson
    Participant
    Vessel Name: Jackpot
    Engines: 6CTA
    Location: Seabrook Texas
    Country: USA

    I know this topic has been discussed many times before and all indications tell me that Blue #5 is the trick stuff for hoses .  I have a set from Tony and am ready to install this week.

    I get it ,  but it seems like it would make the hoses slippery on the connections and more prone to blow off than a dry connection.

    What am I missing here ?  Trying to avoid a ” Jackpot “

     

    Thanks

Viewing 7 replies - 1 through 7 (of 7 total)
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  • #18541

    Rob Schepis
    Forum Moderator
    Vessel Name: Tenacious
    Engines: 6BTA 5.9 330's - "Seaboard Style"
    Location: Long Island, NY
    Country: USA

    Tom,

    If all is well as to no annoying weeping or leaking then you are good as is.  As far as heat, Rectorseal on anything at “coolant temperature” is no issue.

    #18525

    Tom Mann
    Participant
    Vessel Name: Bow Tie
    Engines: Cummins QSM11 660hp
    Location: Key West Fl
    Country: USA

    Thanks for the info!

    Thank you! 

    But, does silicone paste have any adverse effect on the hoses I’ve used it on? I’ve used it on every hose I’ve removed, so far no issues. My local mechanic recommended it a few years ago and it makes live a lot easier removing the hose. You also mentioned “heat sensitive”, is the coolant hose off the engine ok to use it on? Engine temp is 158-160 degrees.

    Tom Mann

    Bow Tie

    #18516

    Philip
    Participant
    Vessel Name: 2007 35’ Cabo ‘FUGA’
    Engines: Cummins QSC8.3-540’s
    Location: Long Beach, CA

    Rector seal #5 – the yellow stuff – use it on hoses and all fasteners that are not heat sensitive. The yellow stuff stays soft and seals threads of fasteners to keep water out.   

    Rector seal blue – hardens – use it on pipe or any fitting that doesn’t need to be disassembled but NOT on hoses as it will dry hard and you won’t get the rubber hose off.  

    o-rings – I use a little alco metalube   

    heat sensitive fasteners such as turbo to exhaust bolts – just some quality hi temp antiseize

    #18514

    Tom Mann
    Participant
    Vessel Name: Bow Tie
    Engines: Cummins QSM11 660hp
    Location: Key West Fl
    Country: USA

    Rector Seal #5

    Hello Rob & Corey,

    I have questions regarding Rector seal #5 (yellow).  I also use it per Tony’s recommendation on all zincs when changing them out. When changing out a hose I’ve been using a little silicone paste, so now should I use Rector seal or will Rector seal “set” and make life difficult when trying to remove the hose?

    My other question is: should I also be using Rector seal when replacing “O” rings?

     

    Thanks,

    Tom Mann

    Bow Tie

    #18511

    Rob Schepis
    Forum Moderator
    Vessel Name: Tenacious
    Engines: 6BTA 5.9 330's - "Seaboard Style"
    Location: Long Island, NY
    Country: USA

    Corey thanks for the flashback with the pictures of the hoses in that link. I took those and sent to Tony when I sea trialed a boat with a pair of 370s a few years back.  I think the owners eyes bulged out more than those hoses when I pointed that out to him!

    #18463

    Corey Schmidt
    Forum Moderator
    Vessel Name: Rebel Belle
    Engines: Cummins
    Location: Oxnard, CA
    Country: USA

    Use YELLOW #5 on all water hose connections… slippery to get the hose on at first, and then it will “set” and keep the hose from any annoying leaks…  

    If your hose “blows off” then look here: https://www.sbmar.com/articles/signs-clogged-raw-water-cooling-system/

    #18459

    Rob Schepis
    Forum Moderator
    Vessel Name: Tenacious
    Engines: 6BTA 5.9 330's - "Seaboard Style"
    Location: Long Island, NY
    Country: USA

    You mention two different products,  the RS #5 is the yellow one, not the blue one.  Either way a “blown” hose is only the result of an issue from back pressure or improper install.  If you’re concerned, make the connection and give it a good tug, I think you’ll be reassured all is well..

Viewing 7 replies - 1 through 7 (of 7 total)

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