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Thread: oil pressure question for a 1966 DJ-5 (f head 134)

  1. #1
    Junior Member
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    Oct 2014
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    oil pressure question for a 1966 DJ-5 (f head 134)

    We have a 1966 DJ-5 with a 134 F Head and are using it daily. I notice that the oil pressure is at around 60 when we start out but decreases to around 20 after driving for a half hour or so. What pressure is normal and if this isn't normal how can I correct it. Thanks, Suncatcher

  2. #2
    Junior Member
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    Jul 2014
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    Watonga,Ok
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    Sounds normal

  3. #3
    Member Go Joe's Avatar
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    Apr 2015
    Location
    Pella Iowa
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    30
    It's normal for oil pressure to drop once an engine is good and warmed up. 20 psi is nothing to worry about.

  4. #4
    Junior Member bpd303's Avatar
    Join Date
    Apr 2015
    Posts
    26
    I ran into the same problem during hot weather. Changed oil to 20W50 and the oil pressure improved when the engine warmed up.

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