Parisienne V8-305 5.0L (1985)
Intake Manifold: Technical Service Bulletins
Intake Manifold, Aluminum - Corrosion Repair
Number:
Date:
86-6-85
5/89
Subject:
ALUMINUM INTAKE MANIFOLD CORROSION (REPAIR PROCEDURE) - 1985 SAFARI WAGON MODELS AND 1986
SAFARI WAGON MODELS WITH 5.0L (VIN Y) ENGINE
A mid-year change was made to the intake manifold gasket. All 1985 and early 1986 models with 5.0L (VIN Code Y) engines used a gasket with an
insulating sheath applied to the gasket in the area that contacts the intake manifold. This insulating material is dark orange in color.
LOSS OF COOLANT
There have been cases where the sheath in the area of the coolant passages has deteriorated which resulted in a leak. Most coolant leaks are external;
however, there have been cases where coolant leaks have been internal. When investigating a loss of coolant, and a leak is not obvious, remove the
intake manifold and examine the gasket for deterioration and evidence of an internal leak in the area of the coolant passages. If an internal leak is found,
replacement of heads, blocks or intake manifolds is unnecessary.
REVISED SERVICE GASKETS
The service gaskets have been revised to delete the insulation sheath. When using one of the revised gaskets, it is essential that sealer, part no. 1050026
or equivalent be applied to both sides of the gasket where it contacts the cylinder head and the intake manifold.
Please revise your 1985 and 1986 Chassis Service Manuals.
Service Procedure:
Intake manifold gasket deterioration as described above may result in corrosion pitting of the aluminum intake manifold.
It is not necessary to replace the intake manifold for this condition. Use an 80% aluminum epoxy such as Devcon "F" or equivalent to fill the corrosion
pits in the aluminum intake manifold. Refer to service procedure below.
SERVICE PROCEDURE:
