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1. #2003 sequoia coolant engine block drain plug install#
2. #2003 sequoia coolant engine block drain plug manual#

Universal coolants do not promise to deliver the corrosion inhibitor chemistry included in DexCool labeled products. While distiiled water and Dexcool is the recommended coolant mix, tap water and Dexcool is a very close 2nd. Thermostat failure? Not in my Northstar experience.Īftermarket cooling system flush chemicals are not for me. Sometimes an O ring leak can be seen on and under the drive pulley shaft and sometimes road draft removes all the evidence. Water pump cartridges do not fail to pump water the O rings fail and create (very slow) coolant leaks. Based on many years and miles of Northstar operation and maintenace. Thank you for your response an confirmation of no drain plugs.

#2003 sequoia coolant engine block drain plug manual#

My Cadillac factory manual states that there are block drains on the early Northstars, but I have never found one on the later models. I am also putting Kool-It additive in as well as the GM coolant Supplement (12378255)that we started using at Cadillac back in the mid-80's(a real lifesaver). Can't put Dexcool back in because of the tap water and am using a universal coolant, which I have been using for several years without a problem or complaint. I flushed the system with a cleaning chemical and then ran the car for 15 minutes while putting fresh tap water in as the water drained out of the radiator drain hole. My customer requested the water pump change in addition to the thermostat that I recommended.

Found no HC in the cooling system and does not build up pressure unexpectedly. Had lost the coolant and was refilled with water, but found no evidence of leaks. Could not duplicate the overheating, but found that it maybe had 1% coolant and 99% water. The car has 123K on it and it overheated unexpectedly. Why are you replacing the water pump (cartridge) and thermostat? To get even close to a 100% coolant change will require draining the radiator 2 or 3 or more times. A 3/4" socket will fit on the radiator drain plug.

The best you can do is remove the bottom trim panel and them remove the drain plug from LH side radiator end panel. Rinse away any excess coolant from the engine and the engine compartment.I am trying to find the block drain plugs so I can do a complete coolant change. Inspect the concentration of the engine coolant, using the J 26568. Run the engine at 2,000-2,500 RPM until the engine reaches normal operating temperature. Slowly fill the cooling system with a 50/50 coolant mixture. Important: Use a 50/50 mixture of DEX-COOL antifreeze and clean, drinkable water.

#2003 sequoia coolant engine block drain plug install#

If the engine block was drained LY7 engine, install the starter motor. Tighten the drain plugs to 22 N Â m (16 lb ft). If the engine block drain plugs were removed from the LA1 or LY7 engine, perform the following: Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems. These coatings affect fastener torque and joint clamping force and may damage the fastener. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Replacement fasteners must be the correct part number for that application. Notice: Use the correct fastener in the correct location. "Â Discolored-follow the flush procedure. "Â Normal in appearance-follow the filling procedure. If a complete engine block drain is required LY7 engine, remove the engine block drain plugs.įollow the appropriate procedure based on the condition of the coolant. If a complete engine block drain is required LY7 engine, remove the starter motor. If a complete engine block drain is required LA1 engine, remove the engine block drain plugs. Refer to Lifting and Jacking the Vehicle. Important: Draining the cooling system with the pressure cap installed will syphon the coolant from the overflow tank. The cooling system will release scalding fluid and steam under pressure if radiator cap or surge tank cap is removed while the engine and radiator are still hot. I have included the drain and fill procedure for your reference.Ĭooling System Draining and Filling Static FillĬaution: To avoid being burned, do not remove the radiator cap or surge tank cap while the engine is hot. But the low condition needs to be addressed. It could also indicate a stuck closed thermostat.

These should be opened when filling, and can be opened when running to purge air out. It looks like there are possibly two bleeder screws, one in the pipe near the water pump, and possibly one at the upper hose outlet. If the coolant level was low, it could be air in the system.