Plastics must be carefully Engineered to be able to withstand this environment (I am one of those Engineers). So much that the entire firewall, and the components in it (the ventilation system) get warmed up. These cars run a VERY high engine compartment temps. You may have noticed how, when you turn on the fan for outside air/ventilation, it is always WARM. These cars NORMALLY operate at 220F coolant temp. The entire cooling system (except for the radiator) is made up of plastic parts, linked by rubber parts. Check the engine coolant level and replenish, if necessary, with the correct engine coolant mixture. Release the system pressure by loosening the pressure relief cap. Pressure should not drop during this time.ĩ. Observe the gauge reading for approximately two minutes. Pressurize the engine cooling system as described in Step 4 (using a pressure relief cap that operates within the specified upper and lower pressure limits). Any leaks which are found must be corrected and the system rechecked. CAUTION: If the pressure drops, check for leaks at the engine to heater core hoses, engine-to- radiator hoses, coolant valve hose (if applicable), oil cooler return tube gasket, radiator and heater core or other system components and connections. If more than 12 kPa (18 psi) shows on the gauge, install a new pressure relief cap.Ĩ. If 8 - 9 kPa (13 psi) cannot be reached, carry out the pressure relief cap component test. Check the sealing surface in the filler neck.ħ. If the pressure relief cap does not hold pressure, remove and wash the pressure relief cap in clean water to dislodge all foreign particles from the gaskets. Slowly depress the plunger of the pressure test pump until the pressure gauge reading stops increasing and note the highest pressure reading obtained.Ħ. NOTE: If the plunger of the pump is depressed too fast, an erroneous pressure reading will result. Install a pressure test pump to the quick-connect fitting of the test adapter.ĥ. Connect the Radiator/Heater Core Pressure Tester to the degas bottle nipple and overflow hose. When certain all the pressure has been released, remove the pressure relief cap (still with a cloth).Ĥ. Step back while the pressure is released from the cooling system. Wait until the engine has cooled, then wrap a thick cloth around the pressure relief cap and turn it slowly one turn (counterclockwise). To avoid having scalding hot coolant or steam blow out of the cooling system, never remove the pressure relief cap from a hot degas bottle. Failure to follow these instructions can result in damage to the cooling system or engine and/or personal injury. WARNING: Never remove the pressure relief cap under any conditions while the engine is operating. Before you start adding stop leak pellets, have the repair shop perform a pressure test of the cooling system.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |