Dayco Heater Tap DHV5631 SRT Lifter and Tappet Fix is

Lifter and Tappet Fix is a professional oil additive that cleans and releases sticking hydraulic lifters and quietens noisy engines

Vent valve: 29mm

000 litres of air for every litre of fuel consumed

that are designed to provide enhanced wear protection

oil oxidation and sludge under all operating conditions

Dayco Heater Tap DHV5631 SRT Lifter and Tappet Fix isThe purpose of the Heater Control Valve is to regulate the flow of coolant to the heater core. In the off position, the heater valve blocks coolant flow to the heater core, hence when no heating is required, and the reverse when heating inside the vehicle is needed. The heater valve can be activated by vacuum control in late model vehicles and cable in earlier models. Common failures include leakage, blocking and, because most late model valves are