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Thread: Oil Pressure Dropping

  1. #1
    Senior Member Tony B's Avatar
    Join Date
    Jul 2012
    Little Tennessee River (Tellico Lak) near Knoxville

    Oil Pressure Dropping

    I have twin Crusader 270 engines - 350 Chevy Block.

    Heading down from Knoxville, Tn. area I noticed my stbd engine which normally held Oil Pressure at about 55 psi, started slowly losing pressure.
    Recently. I had made a new dashboard with all instruments and on short play trips of about 3 or 4 hours i noticed that it was getting lower. We were giving the engines a good run the other day because we are planning to head further south. My starting oil pressure is the old 55 -60 PSI. After about an hour or so it dropped down to about 50 and then to about 45. In idle it dropped below 30.

    I tried to find a reliable mechanic but they are hard to come by. One was supposed to come by today but never called or showed.

    Until he finally gets here, I am in a panic. My oil seems clean, there is hardly any smoke, I'm not using any oil and the engine seems relatively quiet and runs smooth.

    Anyone have any idea what this could be?
    I'm in panic mode, not just because of the expense of repairs, but also, If we dont leave soon we will probably have to stay till spring.

    Thanks in advance
    Houseboater at Heart
    1986 Mainship 36 Dual Cabin Pointed Ended House Boat

  2. #2
    Senior Member easttnboater's Avatar
    Join Date
    Nov 2002
    How many hours on the engine? Assuming they are electric gauges, try swapping the leads from one engine to the other to see if the problem moves - it may be the gauge. It may be the sender. It may be nothing. 30 PSI at idle out of a small block Chevy in a car is actually a bit high.

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