Sealing surfaces of the crankcase and cylinder heads are provided withan 0.8 mm thick silicone layer (Loctite 5900) during standard factoryassembly. Silicone sealant should be applied during repair assemblyonly if sink holes exist in the sealing area.
When cleaning sealing surfaces of the factory applied silicone sealant,during cylinder head reassembly, extreme care must be taken in ordernot to scratch or damage the sealing surfaces.
DO NOT use any gasket removal materials that are abrasive. Failure tofollow this procedure could result in severe and permanent enginedamage.
Some or all of this information was provided by the AutomotiveParts Remanufacturers Association (APRA). For more information ontechnical bulletins available through APRA call 703-968-2772 or visit www.AutoBulletins.com.
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