Oil Restrictor Caution on 2008-2011 GM 1.6, 1.8L Engines
The AERA Technical Committee offers the following information on an oil restrictor caution for 2008- 2011 GM 1.6 & 1.8L LXV & 2H0 engines. These engines are used in Chevrolet Aveo, Pontiac Wave & G3 and Saturn Astra vehicles.
When the cylinder head has been removed, it is important to visually inspect the restrictor shown in Figure 1 below. The restrictor orifice is located on the exhaust side of the block, between cylinders’ number 2 and 3. There have been reports of melted or distorted restrictors on engines that have been severely overheated. If this condition is observed by finding a distorted or melted piece of plastic, further engine diagnosis may be required. Apparently, the high temperature plastic oil feed restrictor orifice in the block deck has exceeded its designed temperatures.
If it becomes necessary to replace the restrictor orifice, not related to excessive engine temperature damage, please use the latest part number listed in the GM parts catalog.
Figure 1. Oil Restrictor in Block Deck
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This information is provided from the best available sources. However, AERA does not assume responsibility for data accuracy or consequences of its application. Members and others are not authorized to reproduce or distribute this material in any form, or issue it to their branches, divisions, or subsidiaries, etc. at a different location, without written permission.
© AERA Engine Builders Association. All rights reserved.
Figure 2. Engine Oiling System
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This information is provided from the best available sources. However, AERA does not assume responsibility for data accuracy or consequences of its application. Members and others are not authorized to reproduce or distribute this material in any form, or issue it to their branches, divisions, or subsidiaries, etc. at a different location, without written permission.
© AERA Engine Builders Association. All rights reserved.