___ compression test with weak battery - CRV

Discussion in 'CR-V' started by 'Curly Q. Links', Nov 6, 2003.

  1. 'Curly Q. Links'

    'Curly Q. Links' Guest

    I did a compression test on a '97 CRV the other day. 70,000 km. (I'm
    thinking of buying it)

    The engine was warmed up, but because of a very weak battery I think the
    compression test may be invalid. With PSI values of 85, 85, 80, 85, I
    think I wasted my time. We made sure it 'pumped' six times for each
    cylinder.

    Anybody know what are the compression test values for the original CRV's
    are supposed to be? Thanks.



    'Curly'
     
    'Curly Q. Links', Nov 6, 2003
    #1
  2. 'Curly Q. Links'

    NetSock Guest

    A warm engine WILL give a slightly lower PSI value on a compression test.
    Most manuals give specs for cold.
    Well...if it is worn, its worn evenly...which also indicates no individual
    cylinder/piston/head/valve problem.

    Find the "cold" specs and get a good battery.
    No need to go any more than two...it wont affect the reading(s).


    --
    '03 S2000
    '94 Accord

    It's just about going fast...that's all...

    http://home.insight.rr.com/cgreen/
     
    NetSock, Nov 6, 2003
    #2
  3. 'Curly Q. Links'

    NetSock Guest

    A warm engine WILL give a slightly lower PSI value on a compression test.
    Most manuals give specs for cold.
    Well...if it is worn, its worn evenly...which also indicates no individual
    cylinder/piston/head/valve problem.

    Find the "cold" specs and get a good battery.
    No need to go any more than two...it wont affect the reading(s).


    --
    '03 S2000
    '94 Accord

    It's just about going fast...that's all...

    http://home.insight.rr.com/cgreen/
     
    NetSock, Nov 6, 2003
    #3
  4. 'Curly Q. Links'

    Eric Guest

    Most of the Honda motors that I'm familiar with have compression specs in
    the 170-185 range. Make sure that you have the throttle wide open when
    you're doing the test. This will help achieve maximum air flow. You can
    also put a small battery charger on the unit to give it a little extra boost
    if the battery is weak (or use jumper cables connected to a good battery).
    I believe the rpm spec for the compression test is 250 rpm.

    Eric
     
    Eric, Nov 7, 2003
    #4
  5. 'Curly Q. Links'

    Eric Guest

    Most of the Honda motors that I'm familiar with have compression specs in
    the 170-185 range. Make sure that you have the throttle wide open when
    you're doing the test. This will help achieve maximum air flow. You can
    also put a small battery charger on the unit to give it a little extra boost
    if the battery is weak (or use jumper cables connected to a good battery).
    I believe the rpm spec for the compression test is 250 rpm.

    Eric
     
    Eric, Nov 7, 2003
    #5
  6. 'Curly Q. Links'

    Ricky Spartacus Guest

    Bought a car with 165, 162, 163, 164, and was not acceptable. It runs
    but not acceptable. Bought another with 184, 185, 186, 182 and was
    acceptable.

    Try a leak down test?
    Rick
     
    Ricky Spartacus, Nov 8, 2003
    #6
  7. 'Curly Q. Links'

    Ricky Spartacus Guest

    Bought a car with 165, 162, 163, 164, and was not acceptable. It runs
    but not acceptable. Bought another with 184, 185, 186, 182 and was
    acceptable.

    Try a leak down test?
    Rick
     
    Ricky Spartacus, Nov 8, 2003
    #7
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