Alliance/Encore L4-1721cc 105 CID (1985)
Technical Service Bulletin # 7E408
Date: 871001
Engine - Oil Consumtion
7E408
OCTOBER 1987
1985-87 ALLIANCE/ ENCORE WITH 1.7L ENGINE
ENGINES
Attention: Workshop, Parts Department
1.7L ENGINE DIAGNOSIS
In some 1985-87, 1.7L engines, abnormal engine oil consumption may be the result of oil leaking past the valve stem seals. Seal leakage may also cause
engine ping and knock if carbon build-up occurs in the combustion chambers.
When diagnosis indicates valve stem seal leakage in a 1.7L engine, install seal, P/N 7700 737 124. This seal was recently released for both production
and service use on 1.7L engines.
The new seals can not be installed with the cylinder head on the engine. The head and the valves must both be removed for seal replacement. An updated
installation procedure is included in this I.S. Note.
Special tool Mot. ML.02, P/N 8981 320 994, is required to install the new seals. This tool must be used to avoid damaging the seals during installation.
The tool is a required item and will be shipped to all dealers.
Seal Installation Procedure
Cylinder Head Removal
CAUTION: Do not remove the cylinder head until the engine is cold (at ambient temperature). If the head is removed while the engine is hot, the head
may warp and require replacement. Let the engine cool for at least six hours beforehand to avoid damaging the head.
1.
Raise the vehicle on a hoist and disconnect the exhaust pipes at the manifold.
2.
Disconnect the oxygen sensor wire and lower the vehicle.
3.
Open the hood and disconnect the battery negative cable.
4.
Drain the cooling system as described on page B-78 of the August, 1986 edition of the M.R. 245 manual.
5.
Remove the air cleaner.
FIGURE 1
6.
Remove the splash shield (1) from the passenger side, front wheel well to provide access to the crankshaft pulley (Fig. 1).
