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| | ===Head gasket repair additives=== | | ===Head gasket repair additives=== |
| − | Engine additives that claim to repair questionable head gaskets should only be considered a temporary fix, at best. Nevertheless, they may occasionally be used.
| + | Any "leak stopper" or head gasket "repair additive" should be avoided. Use of such products leads to further engine damage, such as seized or leaking water pumps, clogged water or oil passages, or clogged radiators and thermostats. Do not use these products. |
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| − | Common products include [http://www.barsproducts.com/1100.htm Bar's Leaks head gasket repair], [http://www.rxauto.com/ Thermagasket]and GOSS Chem-i-Weld. Also, sodium silicate (known also as "water glass") can be used, and it's an ingredient in some commercial head gasket repair additives. It can be found at a pharmacy. It is incompatible with antifreeze, thus the system must be emptied before the water glass can be used. Then the system is flushed and the antifreeze replaced.
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| | ===Head gasket re-torquing=== | | ===Head gasket re-torquing=== |
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