TROUBLE SHOOTING
Note. To trouble shoot engine mechanical components, see appropriate table in TROUBLE SHOOTING article in GENERAL INFORMATION.
Inspection
Before cleaning, check for leaks, damage and cracks. Using a gasket removing compound, soften old gasket material. Clean cylinder head and engine block. Clean oil passages. (Схема №33) Check cylinder head for warpage. Cylinder head must not be warped beyond.008" (0.2 mm). DO NOT grind more than.008" (.20 mm) combined total from surfaces of cylinder head and cylinder block deck.
Note. Cylinder head bolts are tightened using a torque-to-yield procedure. Bolts should be examined before reuse. If threads are necked down or stretched, bolts must be replaced. Necking can be checked by holding a straightedge against threads. If all threads do not contact straightedge, replace bolt.
Check rocker arm roller and rocker arm bore for scuffing or wear. Ensure swivel pad on lash adjuster is not missing or broken. Inspect rocker arm for fatigue or cracking. Ensure roller axle is not protruding from rocker arm. (Схема №18) Inspect shaft for wear or damage. With a small wire, check oil holes for clogging. Replace any rocker arm showing wear or fatigue.
| CAUTION | DO NOT remove lash adjuster from rocker arm assembly. If lash adjuster is broken or worn, replace rocker assembly. |
Inspect camshaft bearing journals for damage and binding. If journals are binding, also check cylinder head for damage. Check cylinder head oil passages for clogging. (Схема №33) Check cam lobes for abnormal wear and damage. Replace if damaged. Measure lobe height and replace if out of tolerance. See CAMSHAFT table under ENGINE SPECIFICATIONS. (Схема №22) Check cam follower assembly for wear or damage. Replace as necessary.
- Inspect components for damage. Using straightedge and feeler gauge, check flatness of pump cover. Replace cover if it is equal to or exceeds specification. See «OIL PUMP SPECIFICATIONS»(ref-9332-S08970857542000101800000) table.
- Measure thickness of both rotors. Replace rotors if not within specification.
- Install outer rotor in timing belt cover. Measure clearance between outer rotor and timing belt cover. If clearance is equal to or exceeds specification but outer rotor O.D. is within specification, replace timing belt cover.
- Install inner rotor, and measure clearance between inner and outer rotors. Replace pump assembly if clearance is equal to or exceeds specification. See «OIL PUMP SPECIFICATIONS»(ref-9332-S08970857542000101800000) table.
- Place straightedge across timing belt cover surface. Using feeler gauge, check rotor end clearance between rotors and straightedge. Replace pump assembly if clearance is equal to or exceeds .003" (.077 mm).
- Ensure pressure relief valve slides freely in bore. Check free length and pressure of pressure relief valve spring. Replace spring if it is not within specification. See «OIL PUMP SPECIFICATIONS»(ref-9332-S08970857542000101800000) table.
| Application | Specification | |
|---|---|---|
| Inner Rotor-To-Outer Rotor Clearance | .008" (.20 mm) | |
| Outer Rotor O.D. | 3.141" (79.78 mm) | |
| Outer Rotor-To-Timing Belt Cover Clearance | .015" (.39 mm) | |
| Pressure Relief Valve Spring | ||
| Free Length | 1.95" (49.5 mm) | |
| Spring Pressure | 23-25 Lbs. @ 1.339" (10-11 kg @ 34.00 mm) | |
| Pump Cover Flatness | .001" (.025 mm) | |
| Rotor End Clearance | .015" (.39 mm) | |
| Rotor Thickness (Inner & Outer) | .563" (14.3 mm) | |
OIL PUMP SPECIFICATIONS