12.7 waterpump o ring

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Rideandrepair, Dec 4, 2019.

  1. Rideandrepair

    Rideandrepair Road Train Member

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    6F6674DD-52ED-4606-9739-88CE75F3FFE5.jpeg i bought a waterpump “Gates” from FleetPride, and o ring was missing, I stopped at Freightliner and got one. However it wasn’t a round, but a thin square one. Looked at their waterpump for my Truck, same o ring. Verified the same at another Dealer. Old waterpump had a round o ring.I ended up getting a new round o ring. My question is has anyone installed a waterpump on a 12.7 using the new thin square style o ring.It acts like it wants to lay down into the groove, when installing waterpump. Like a leak waiting to happen.Another thing, I’m wondering is what’s the difference between Gates greenline and blueline hoses? I somehow got 1 of each. Never heard of Blueline before.
     
    Last edited: Dec 4, 2019
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  2. VWbeagle

    VWbeagle Bobtail Member

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    Dec 21, 2016
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    Not sure about the hoses, but I just did a water pump on a 12.7 last week. Exact same o ring on the new one. I would have to double check what was on the old one, but no leaks on the new one yet.
     
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  3. VWbeagle

    VWbeagle Bobtail Member

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    Dec 21, 2016
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    So checked the core, same square o ring. It had been in there for some time and never leaked.
     
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