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| | Don't use wire brushes -- the wires can break off, get into the oil pump, and lock it up. ''(What about 3M "hair brush" pads? What are those? Safe to use?)''. | | Don't use wire brushes -- the wires can break off, get into the oil pump, and lock it up. ''(What about 3M "hair brush" pads? What are those? Safe to use?)''. |
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| − | ====MLS head gaskets====
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| − | Sealant use may be required when retrofitting MLS head gaskets to engines which were not originally produced with MLS head gaskets, or when using MLS head gaskets on engines that have not been properly prepared. For proper coolant and oil sealing, MLS head gaskets require surface finishes of 30 RA (Roughness Average) or finer, this is because the elastomeric coating on the sealing surfaces of MLS head gaskets is approximately .001" thick which is too thin to seal leak paths in the peaks and valleys of rougher (RA30+) finishes.
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| − | ====Steel Shim Head Gasket====
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| − | Steel shim head gaskets are exactly what the name implies, simply a thin sheet of embossed steel with no sealers applied. Steel shim gaskets rely on the combination of increased localized pressure from the embossment (stamped ridges) much like MLS head gaskets, with the addition of a user applied sealant to insure liquid tight operation.<BR>
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| − | ====Standard Copper Head Gaskets====
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| − | Traditional flat copper head gaskets require the use of additional sealant for cooling and/or oil passage sealing. Similar to steel shim gaskets, traditional copper gaskets have no sealants applied.
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| | ===Head gasket repair additives=== | | ===Head gasket repair additives=== |
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