Freightliner Century S60 low boost! Help

Discussion in 'Freightliner Forum' started by Alex1990, Dec 7, 2019.

  1. Alex1990

    Alex1990 Bobtail Member

    Jun 20, 2015
    Hi everyone, have some weird problem. I’ve got Detroit S60 14 L , and in one day I found it makes really low boost and poor MPG. So I decided to do a pressure charge air system leak test , and found major leaks over intake manifold gaskets . So I replaced them ,clean manifold and head with metal brush.Did test again and problem is still there . Basically system is not holding pressure ( pressure drops right away, from 25psi to 0 psi in 10 seconds) .Re did the test and found that air still leaking through intake manifold gaskets but much less . These gaskets just metal with no rubber or something like that . So should I try to put some sealer over the gaskets or what to do ? But honestly ,I don’t think gasket is only the problem , cause leak is really small and can’t lead to such sudden air lose . Need to look somewhere else but can’t see or hear air disappear.
  2. Hulld

    Hulld Road Train Member

    Oct 19, 2015
    Upstate NY
    Check your charge air cooler in front of the radiator.
    Use a spray bottle with soapy water in it and spray down the entire system you should see the leak fairly easily.
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