Valve Spring - Revised
90jaguar05VALVE SPRINGS SECTION: 12
No : 20
Model: 90 MY SEDAN RANGE Date: JUNE, 1990
KEY POINTS: INSPECTION OF VALVE SPRINGS
New valve springs (EBC 4871) have been introduced on 1990 My Sedans at engine number 9EPCLA120245. These springs, which have undergone an improved inspection procedure, are identified by a white marking on the spring wire.
If valve spring breakage occurs on a 4.0 liter engine up to engine number 9EPCLA120245, it is necessary to replace all valve springs. If valve spring breakage occurs on a later 4.0 liter engine, then only the broken spring should be replaced. Parts stock of valve spring EAC 5875 can be used as service replacements.
NOTE: If valve spring breakage has resulted in valve head detachment, combustion chamber and/or piston damage, it is necessary to inspect the intake manifold/ports and exhaust manifold. They should be clean and free from any debris before reassembly.