Engine Mechanical (2JZ-GE): Diagnosis Lexus GS II рестайлинг

TROUBLE SHOOTING

To trouble shoot mechanical engine components, see ENGINE MECHANICAL article under BASIC TROUBLESHOOTING in GENERAL INFORMATION.

Inspection

1. Using caliper, measure cylinder head bolt diameter 2.0 in. (50 mm) down from bottom of bolt head. Replace cylinder head bolts if diameter is less than .421 in. (10.70 mm).
2. Using a straightedge and feeler gauges, check for warpage at cylinder head surface, and intake and exhaust manifold sealing areas. Replace cylinder head if warpage exceeds specification. See «CYLINDER HEAD»(ref-159170-S01575721302003111400000) table under ENGINE SPECIFICATIONS.
3. Check warpage of intake manifold, air intake chamber and exhaust manifold. Replace component if warpage exceeds specification. See «WARPAGE SPECIFICATIONS»(ref-159170-S12580154682003111400000) table. WARPAGE SPECIFICATIONS Application In. (mm) Air Intake Chamber .0059 (.150) Exhaust Manifold .0200 (.508) Intake Manifold .0059 (.150)
4. Inspect cylinder block deck surface for warpage. Replace cylinder block if deck warpage exceeds specification. See «CYLINDER BLOCK»(ref-159170-S26356804362003111400000) table under ENGINE SPECIFICATIONS. Inspect camshaft and components. See «CAMSHAFT»(ref-159170-S06415923672003111400000) .

Inspect components for damage. Measure lifter diameter and bore diameter. Ensure oil clearance is within specification. Replace components if not within specification. See VALVE LIFTERS table under ENGINE SPECIFICATIONS.

1. Inspect components for damage. Check camshaft journal diameter, lobe height and journal runout. Replace camshaft if not within specification. See «CAMSHAFT»(ref-159170-S00940828812003111400000) table under ENGINE SPECIFICATIONS.
2. Place Plastigage on camshaft journals. Install No. 3 and 7 camshaft bearing caps. Coat all camshaft bearing cap bolt threads and bolt-to-camshaft bearing cap surface with engine oil.
3. Install camshaft bearing cap bolts in No. 3 and 7 camshaft bearing caps. Alternately tighten No. 3 and 7 camshaft bearing cap bolts until snug with cylinder head.
4. Install remaining camshaft bearing caps and bolts. Alternately tighten all camshaft bearing cap bolts to 15 ft. lbs. (20 N.m). (Схема №9) Ensure camshaft does not rotate.
5. Remove camshaft bearing cap bolts in sequence using several steps. (Схема №9)
6. Measure width of Plastigage to check oil clearance. Replace camshaft and/or cylinder head if oil clearance is not within specification. See «CAMSHAFT»(ref-159170-S00940828812003111400000) table under ENGINE SPECIFICATIONS.
7. Check camshaft end play with camshaft bearing cap bolts tightened to specification. See «TORQUE SPECIFICATIONS»(ref-159170-S19795112022003111400000). Replace camshaft and/or cylinder head if end play is not within specification. See «CAMSHAFT»(ref-159170-S00940828812003111400000) table under ENGINE SPECIFICATIONS.

1. Inspect components for damage. Coat relief valve with engine oil. Ensure relief valve slides freely in bore. Install drive and driven rotors in oil pump body with reference mark (triangle mark) toward oil pump cover.
2. Using feeler gauge, measure driven rotor-to-oil pump body clearance. Replace rotor assembly or oil pump assembly if clearance exceeds specification. See «OIL PUMP SPECIFICATIONS»(ref-159170-S10363172842003111400000) table.
3. Measure clearance between tips of both rotors. Replace rotor assembly if clearance exceeds specification. See «OIL PUMP SPECIFICATIONS»(ref-159170-S10363172842003111400000) table.
4. Place straightedge across oil pump body, above both rotors. Measure rotor end clearance between straightedge and surface of each rotor. Replace rotor assembly or oil pump assembly if clearance exceeds specification. See «OIL PUMP SPECIFICATIONS»(ref-159170-S10363172842003111400000) table.

OIL PUMP SPECIFICATIONS