Revision: 2005 August 2005 350Z
? If the engine speed is out of specified range, check battery liquid for proper gravity. Check engine
speed again with normal battery gravity.
? If compression pressure is below minimum value, check valve clearances and parts associated with
combustion chamber (valve, valve seat, piston, piston ring, cylinder bore, cylinder head, cylinder head
gasket). After the checking, measure compression pressure again.
? If some cylinders have low compression pressure, pour 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, valves may be mal-
functioning. Check valves for damage. Replace 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 are leaking. In such a case, replace cyl-
inder head gaskets.
9. After inspection is completed, install removed parts.
10. Start engine, and make sure that engine runs smoothly.
11. Perform trouble diagnosis. If DTC appears, erase it. Refer to EC-96, "
TROUBLE DIAGNOSIS" .
Removal and Installation ABS009YX
1. Remove camshaft. Refer to EM-102, "CAMSHAFT" .
It is also possible to perform the following steps 2 and 3 just before removing the camshaft.
2. Temporarily fit front suspension member to support engine. Refer to FSU-19, "
1. Engine rear lower slinger 2. Cylinder head (left bank) 3. Cylinder head bolt
4. Cylinder head (right bank) 5. Cylinder head gasket (right bank) 6. Cylinder head gasket (left bank)
7. Oil level gauge guide