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Thread: 89 mustang gt low oil pressure

  1. #1
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    89 mustang gt low oil pressure

    I was wondering if anyone had an answer for my problem. I have a 1989 Mustang GT. Its a 302 5 speed. The motor was just rebuilt. My friends and I did most of the work. It was bored out to a 306, keith black pistions, stock rods, a remanufactured crank to stock specs, new bearings, comp cam with new bearings, a new oil pump, heads are factory with new seals, shaved and a cold air intake with the rest being stock. After we got everthing buttoned up we primed the motor, it was reading great pressure while priming it with a drill. When I started the car is was reading very low on the guage. Since it was the stock guage I went out a got a mechinical one and disconected the sensor and plugged the new guage in. Now it reads 5-8 psi when I start it up. After this I let the car sit for about 3 months until I got a new distributer for it. I took off the coil wire and turned the car over for about 10 mins then started it up. Im still getting about 5-8 psi at idle and when it reves up it will go up to about 15-20 at 2000-2500 rpm and at 3000 rpm it about 25-28 psi. Does anyone have any idea what the issue might be? Thanks for reading and the help.

  2. #2
    Senior Member 07v6vistablue's Avatar
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    Did you plasitgage the mains and rods before final assembly? Also drop the pan to see if something is clogging the pickup screen.
    Sam



    07 V6 Vista Blue, CAI, Fang Chin Spoiler, GT Rockers, Painted Mirror Covers, Billit Grill, FR500's & Nitto 555's, Shaker Intake

  3. #3
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    Yes I guaged the mains and the rods. Thanks for the tip.

  4. #4
    What were your clearances?
    ChuckT
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  5. #5
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    Quote Originally Posted by CobraII View Post
    What were your clearances?
    I dont remember at this point. Its been over a year since we put it together.

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