Fluctuating coolant temperature, pressurisation or just coolant leaks (so annoying!)? Before damage occurs to the engine due to overheating, cylinder-head warping with gasket failure and coolant mixing with lubricant (that is never ideal!), an overhaul of the cooling system may be in order.
Apart from this component you may also wish to consider some of those listed below:
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Pro-workshop gasket sealant 08CRAHLG120G - easy to apply with professional results.
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This component may have other applications within the Honda model range.