Inspection [04/2013 - 08/2015]: Procedure

WARNING: This page is about a different car, the 2015 Lexus IS 250 and 2014 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT OIL PUMP RELIEF VALVE

Coat the oil pump relief valve with engine oil and check that it falls smoothly into the valve hole by its own weight.

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If the oil pump relief valve does not fall smoothly, replace it. If necessary, replace the timing chain or belt cover sub-assembly.

INSPECT OIL PUMP ROTOR SET

Install the rotors to the timing chain cover sub-assembly with the marks facing up. Check that the rotors rotate smoothly.

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Mark

If they do not rotate smoothly, replace the timing chain or belt cover sub-assembly.

Check the tip clearance.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*1	Feeler Gauge

Using a feeler gauge, measure the clearance between the drive and driven rotor tips as shown in the illustration.
Standard tip clearance

0.060 to 0.160 mm (0.00236 to 0.00630 in.)

Maximum tip clearance

0.160 mm (0.00630 in.)

If the tip clearance is more than the maximum, replace the oil pump rotor set.

Check the side clearance.

*1	Feeler Gauge
*2	Precision Straightedge

Using a feeler gauge and precision straightedge, measure the clearance between the rotors and precision straightedge as shown in the illustration.
Standard Side Clearance

0.030 to 0.090 mm (0.00118 to 0.00354 in.)

Maximum Side Clearance

0.090 mm (0.00354 in.)

If the side clearance is more than the maximum, replace the oil pump rotor set. If necessary, replace the timing chain or belt cover sub-assembly.

Check the body clearance.

*1	Feeler Gauge

Using a feeler gauge, measure the clearance between the timing chain or belt cover sub-assembly and driven rotor as shown in the illustration.
Standard Body Clearance

0.250 to 0.325 mm (0.00984 to 0.0128 in.)

Maximum Body Clearance

0.325 mm (0.0128 in.)

If the body clearance is more than the maximum, replace the oil pump rotor set. If necessary, replace the timing chain or belt cover sub-assembly.