| Acura Engine >> RESURFACING & HANDLING CYLINDER HEAD CAUTION FOR MLS GASKET |
Resurfacing & Handling Caution For Engines Using
Multi Layer Steel Head Gaskets
The AERA Technical Committee offers the following information when resurfacing and handling heads for engines that are using Multi Layer Steel (MLS) style head gaskets. This MLS design has been used before in other sealing locations, however it is only recently that they have been used for head gaskets.
To prevent possible engine failures, all company personnel should be trained in the proper handling of these cylinder heads. This should include counter, delivery, disassembly and cleaning personnel plus all machinists in the shop. These heads required a very smooth surface finish in order to seal coolant, oil and combustion. All must be aware of the careful handling required to protect the head gasket surface on these cylinder heads.
Many of these cylinder heads have factory produced surface finish in the area of 7-27 Ra. Check with gasket manufactures for the required Ra for the gasket they are supplying. Most are looking for 30 Ra maximum with MLS gaskets.
Listed below are the engines AERA is currently aware of that use a MLS gasket from the factory. Rest assured that there will be more engines to follow. Some engines will be retrofitted with the MLS gasket and require the proper surface finish, such as the Chrysler 2.0L Neon engine. For additional information on the Neon engine, see AERA Technical Bulletin TB 1636.
Acura Chrysler Ford Harley-Davidson Honda Mazda Mitsubishi Toyota
B17A1 C-2.0L 2.0L Screaming 1.5L 1.5L 3.0L 5EFE-1.5L
1.7L B,S,X 3.0L Eagle Series D15Z 112/1.8L 2CTLC-2.0L
2.4L
BA1A 2.7L 4.0L D16Z 153/2.5L 7AFE-1.8L
1.8L 8.0L 4.6L BA-1.8L JE-3.0L 5VZFE-3.4L
5.4L 2.2L B1
6.8L 2.2L B2
2.3L H
2.3L AL
2.5L
The AERA Technical Committee
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