Noise from top end of engine - rocker arms

NOISE FROM TOP END OF ENGINE - ROCKER ARMS

Model

Range Rover Discovery Defender

Affected vehicles

All V8 derivatives within VIN ranges: Range Rover WA 382672 to WA 391018 Discovery WA 753113 to WA 769495 Defender VA 131591 to WA 140244 (carburettor versions only)

Date

1998-04-29

Reference

Bulletin 0009, CDS ref L8428bu

Bulletin text

Range Rover Discovery Defender

AFFECTED RANGE:

All V8 derivatives within VIN ranges:

Range Rover WA 382672 to WA 391018 Discovery WA 753113 to WA 769495 Defender VA 131591 to WA 140244 (carburettor versions only)

PROBLEM:

NOISE FROM TOP END OF ENGINE - ROCKER ARMS

The customer complains of a rattling/tapping noise from the engine which is found to originate from the rocker shaft area.

CAUSE:

The hardened pushrod cup is insecure in the rocker arm.

ACTION:

Refer to the following information to determine which rocker arms are serviceable and which must be replaced:

Remove the rocker covers. Refer to Overhaul • Manual, V8 Engine - Overhaul Rocker Shafts .

Locate the rocker arm casting die identity code, • (refer to illustrations) .

Any arms which have either die code 17., 18., 19. • or 20., (illustration A), must be replaced, see NOTE in PARTS INFORMATION .

Replacement rocker arms will carry either die • code 13A, 14A, 15A or 16A, (illustration B). Only these are acceptable for use.

Confirm that noise criticism has been resolved. •

Bulletin N o : 0009 L8428bu 1 29.04.98

PARTS INFORMATION:

602153 - Rocker arm - LH

602154 - Rocker arm - RH

NOTE:

Stock of the above parts which you are holding must be inspected. Any which carry either die code 17., 18., 19. or 20., must be returned immediately to Land Rover Parts.

The normal DY Returns procedure should be followed using the RC code and making reference to this Bulletin - Engine No 9.

Land Rover Parts Marketing Bulletin No 1363 refers.

WARRANTY CLAIMS: Use Complaint Code: 1H5K

Use the appropriate existing SRO as detailed below:

12.29.55 Remove both rocker covers and check rocker arms. Renew rocker arms as required on both shafts

Where only rocker arms on the LH rocker shaft require replacement, claim as follows:

12.29.49 Remove LH rocker cover and check rocker arms. Renew rocker arms as required on LH shaft.

Use together with:

12.29.41 Remove and refit RH rocker cover

Where only rocker arms on the RH rocker shaft require replacement, claim as follows:

12.29.50 Remove RH rocker cover and check rocker arms. Renew rocker arms as required on RH shaft.

Use together with:

12.29.40 Remove and refit LH rocker cover

Refer to the Repair Operation Times Manual for the model in question for individual repair times.