| Land Rover Engine >> IMPROVED INTAKE MANIFOLD GASKET |
Improved Intake Manifold Gasket On
1997-98 Land Rover 4.0L Engines
The AERA Technical Committee offers the following information on an improved intake manifold gasket on 1997-98 Land Rover 4.0L engines. Owners have
expressed reports of intake manifold leaks as coolant and oil leaks have been noticed.
To resolve this condition, Land Rover offers a revised intake manifold gasket and suggests the use of flat washers with the mounting bolts. Using the new design gasket and flat washers improves the clamping load on the intake manifold to cylinder head joint. As a result of the design change, the sealing
integrity of the mating area is greatly improved.
The design change in the gasket can be easily identified in the shape of the gasket around the inlet cooling port opening as shown in Figure 1. The new gasket can be obtained with Part #ERR7306. The washers may be obtained with Part #WA110061L. AERA is unaware of a source other than Land Rover for the
revised parts.
To install the gaskets and washers correctly, Land Rover offers the following information and torque sequence.
1. Tighten the small clamp bolts at the front and rear to 4-7 ft/lbs.
2. With the washers installed under the head of all bolts, tighten the 12 intake manifold/cylinder head bolts to 21 ft/lbs in the sequence shown in
Figure 2.
3. Allow the gasket to bed in for at least 5 minutes.
4. In the sequence shown in Figure 2, tighten the intake manifold/cylinder head bolts to 35-40 ft/lbs.
5. Tighten the small clamp bolts at the front and rear to 10-15 ft/lbs.
The AERA Technical Committee
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