Contents Wiring diagrams Section: Mechanical All sections

2.0L 4-Cylinder: Diagnosis Mazda 626 GF

Mechanical ~148 words

TROUBLE SHOOTING

To trouble shoot engine mechanical components, see appropriate table in TROUBLE SHOOTING article in GENERAL INFORMATION.

Inspection

Check cylinder head warpage. If warpage exceeds specification, resurface head, but DO NOT exceed grinding limit. See CYLINDER HEAD table under ENGINE SPECIFICATIONS. After resurfacing cylinder head, check cylinder head height. Replace cylinder head if height is less than minimum specification. Replace cylinder head bolts if length from bolt head contact surface to tip of bolt shank exceeds 4.154" (105.5 mm).

Inspect all friction surfaces for scoring or wear. Measure camshaft dimensions. Replace camshaft if dimensions are not within specification. See CAMSHAFT table under ENGINE SPECIFICATIONS.

Replace pressure relief valve spring if length is not as specified. See OIL PUMP SPECIFICATIONS table. Ensure plunger slides freely in bore. Replace front cover and oil pump assembly if clearances are not as specified. See OIL PUMP SPECIFICATIONS table.