Nissan Maxima Service and Repair Manual: Compression Pressure

On-Vehicle Service

CHECKING COMPRESSION PRESSURE

Nissan Maxima. CHECKING COMPRESSION PRESSURE

  1. Run the engine until it reaches normal operating temperature.
  2. Turn the ignition switch to OFF.
  3. Release fuel pressure. Refer to EC-592, "Inspection".
  4. Remove all six spark plugs.

    Refer to EM-12, "Removal and Installation".

  5. Attach a compression tester to No. 1 cylinder.
  6. Depress accelerator pedal fully to keep the electric throttle control actuator butterfly-valve wide open to maximize air intake flow.
  7. Crank the engine and record the highest gauge indication.
  8. Repeat the measurement on each cylinder (steps 5 - 7).

Nissan Maxima. CHECKING COMPRESSION PRESSURE

  • Always use a fully-charged battery to obtain specified engine speed.
  • If the engine speed is out of the specified range check the battery and recharge as necessary. Check the engine speed again with the battery properly charged.
  • If some cylinders have low compression pressure, pour a small amount of engine oil into the spark plug hole of the cylinder to re-check it for compression.
  • If the added engine oil improves the compression, piston rings may be worn out or damaged. Check the piston rings and replace if necessary
  • If the compression pressure remains at low level despite the addition of engine oil, the valves may be malfunctioning. Check the valves for damage. Replace the valve or valve seat accordingly.
  • If two adjacent cylinders have respectively low compression pressure and their compression remains low even after the addition of engine oil, cylinder head gaskets may be leaking, or a valve in adjacent cylinders may be damaged. Inspect and repair as required.
  • If the compression pressure is below the minimum value, check the valve clearances and parts associated with the combustion chamber (valve, valve seat, piston, piston ring, cylinder bore, cylinder head, cylinder head gasket). After the checking, measure the compression pressure again.
    Camshaft Valve Clearance
    Valve Clearance CHECKING NOTE: Perform inspection as follows after removal, installation or replacement of camshaft or valve related parts, or if there are unusual engine conditions rega ...

    Removal And Installation
    ...

    Other materials:

    Periodic maintenance
    FUEL SYSTEM Inspection Inspect fuel lines, fuel filler cap and fuel tank for improper attachment, leaks, cracks, damage, loose connections, chafing or deterioration. If necessary, repair or replace damaged parts. Quick Connector CAUTION:  After connecting fuel tube quick connec ...

    B2604 transmission range switch
    Description BCM confirms the shift position with the following 4 signals.  CVT selector lever  Transmission range switch  P position signal from IPDM E/R (CAN)  P position signal from TCM (CAN) DTC Logic DTC DETECTION LOGIC NOTE: I ...

    B1145 - B1148 side curtain air bag module RH
    Description DTC B1145 - B1148 RH SIDE CURTAIN AIR BAG MODULE The RH side curtain air bag module is wired to the air bag diagnosis sensor unit. The air bag diagnosis sensorunit will monitor for opens and shorts in detected lines to the RH side curtain air bag module. PART LOCATION DTC Logic ...

    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

    © 2017-2021 Copyright www.nimainfo.com
    0.014