1/8/2024 0 Comments 89 bars to psi![]() Also, coolant expelled from the heater core as vapor could cause fogging of the interior surfaces of the windows, reducing visibility and the driver's ability to control the vehicle. In some cases, the coolant could contact an occupant and cause skin injury. If a crack were to form or a seam were to separate in the heater core end piece, hot coolant could suddenly be expelled. If the indications (e.g., movement of coolant temperature gauge needle into red zone) of such a critical overheating condition are not heeded by the driver, and if, in addition, the vehicle is operated under high-load conditions such that the elevated pressure cannot be adequately relieved, it is possible that damage to, or failure of, a coolant system component could occur. The malfunction or failure of a coolant system component, such as a thermostat, water pump or fan belt, can result in significantly increased coolant temperature and system pressure. The coolant system is composed of a number of components that are exposed to continuous thermal and mechanical loading. ![]() has voluntarily initiated a safety recall campaign that involves the coolant system of the affected vehicles. There was a recall: Subject: Rad Cap Recall TSB 170198 was issued in October 1998. ![]() Both of those housing styles are poorly designed, and will push coolant out of the cap at high RPM. In street car applications, an upright radiator (top and bottom tanks, with the cap on the top tank) represents a compromise that will work, as long as the car is not operated at sustained high RPM, like those seen in racing.Īny aftermarket thermostat housing that mounts the radiator cap directly above the thermostat location, or that mount the radiator cap in the top coolant hose, are NOT recommended. Air in the system will then migrate to the area just below the radiator cap, again so that it will forced out first if system pressure exceeds the radiator cap's rating. The surge tank is also large enough to allow the air to separate as the coolant flows through it. The bleed line allows some circulation through the tank while the engine is running. A 1/4" to 3/8" "bleed" line from the side of the surge tank is connected to the highest point of the low pressure side of the radiator. The bottom of the tank is connected to the inlet side of the water pump with a 1/2" or 3/4" line. A surge tank is typically a 1 quart tank mounted at the highest point of the system, with the radiator cap on top.
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