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| Saturn Engine >> ENGINE COOLANT LEAKS ON 1.9L DOHC SATURN ENGINES
Engine Coolant Leaks On
2000-2001 GM 1.9L DOHC Engines
The AERA Technical Committee offers the following information on an engine coolant leak on 2000-2001 GM 1.9L DOHC engines. These engines are used in the Saturn vehicles made by GM. Vehicles affected are up to and include VIN 1Z305500. Some customers may comment about loss of engine coolant, low coolant levels and/or engine overheating.
These customer complaints may be due to the intake manifold gasket leaking. The leak may occur at the cylinder head to intake manifold coolant passage located at the rear of the number four cylinder intake port. The intake manifold seal may experience a compression set allowing an external coolant leak past the seal during cold engine operating conditions.
To solve the complaint of coolant loss, Saturn has come up with a revised intake manifold gasket for the DOHC engines. The gasket is a new 2-piece design as show in Figure 1. A separate coolant seal (1) that is made of a different material and is black in color. A shortened intake manifold gasket (2) is of the same material and orange in color like the original one-piece design.
The AERA Technical Committee
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