Menu

Compression Question

This topic contains 5 replies, has 3 voices, and was last updated by Dodge Guy Randy hamilton 11 hours, 11 minutes ago.

  • Creator
    Topic
  • #996100
    Dodge Guy
    Randy hamilton
    Participant

    2006 Dodge Caravan with low miles.
    Compression on cylinder #2 (Pass Side front) is 150 cold and 150 hot
    Compression on cylinder #4 (middle front) is 135 cold and 150 hot
    Compression on cylinder #6 (Driver side front) is 45 cold and 150 hot.

    Car runs great, gets get gas mileage, oil color and texture normal. Coolant is normal.

    What do you think. Normal?

Viewing 5 replies - 1 through 5 (of 5 total)
  • Author
    Replies
  • #996101
    Dodge Guy
    Randy hamilton
    Participant

    Cyl #1 – 150 Engine Warm
    Cyl #3 – 150 Engine Warm
    Cyl #5 – 153 Engine Warm (rear driver side) not tested hot

    Doesn’t seem to be consuming oil or water

    #996174
    Dodge Guy
    Randy hamilton
    Participant

    Compression tested ~150 psi on all cylinders today (cold)

    Unclear why the low reading several days ago. Perhaps a sticking valve or ring.

    #997899
    hondaguy453
    hondaguy453
    Participant

    Hello, Randy! Did you have a P0306 and that’s why you tested compression, or were you checking for your own peace of mind? As you mentioned, it could have been a sticky valve which usually stems from carbon buildup. You can try using some seafoam to clean the carbon out.

    #997905
    EricTheCarGuy 1
    EricTheCarGuy
    Keymaster

    Compression test really don’t tell you much. A leak down test is much more informative in my view. I only do compression tests when looking for a dead cylinder. If you don’t have a misfire, or any codes, and the engine runs fine, you’re probably fine. The discrepancies are likely due to testing errors.

    #998054
    Dodge Guy
    Randy hamilton
    Participant

    Thanks.
    I just drove the vehicle on a 2000 mile road trip with no issues. Gas mileage as expected or slightly better for a V6 and a loaded vehicle at approximately 4600lb gross.
    Seems to have been a testing failure rather than an engine component failure.

Viewing 5 replies - 1 through 5 (of 5 total)

You must be logged in to reply to this topic.

Loading…