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Notices C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace Sponsored by: Community Links Pictures & Albums Members List Search Forums Show Threads Show Posts Tag Search Click for Advanced Search Find All Liked Posts Go to Page... Bleeding air from coolant system Reply Subscribe Thread Tools Search this Thread Apr 9, 2008 | 04:40 PM Share Share Options #1 TheBigDog Thread Starter Burning Brakes Joined: Nov 2002 Posts: 1,156 Likes: 170 From: Ohio Bleeding air from coolant system Does any one know where I can find the procedure for bleeding air from the coolant system? I want to know before I change the thermostat. Thanks, The Big Dog Reply 0 0 TheBigDog View Public Profile Send a private message to TheBigDog Find More Posts by TheBigDog Apr 9, 2008 | 04:58 PM Share Share Options #2 Gideon's_Test Drifting Joined: Dec 2006 Posts: 1,523 Likes: 5 From: Holly, Michigan Draining and Filling Cooling System Caution With a pressurized cooling system, the coolant temperature in the radiator can be considerably higher than the boiling point of the solution at atmospheric pressure. Removal of the surge tank cap, while the cooling system is hot and under high pressure, causes the solution to boil instantaneously with explosive force. This will cause the solution to spew out over the engine, the fenders, and the person removing the cap. Serious bodily injury may result. Important If the procedure below is not followed a low or high coolant level condition and/or vehicle damage could result. 1) Park the vehicle on a level surface. 2) Remove the surge tank cap: 3)Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information. 4) Place a drain pan under the drain plug. 5) Open the radiator drain plug . 6) Allow the cooling system to drain completely. 7) Inspect the engine coolant for the following: Discolored -- follow the flush procedure below. Normal in appearance -- continue with the next step. Notice When adding coolant, use DEX-COOL® coolant. If silicated coolant is added to the system, premature engine, heater core or radiator corrosion may result. In addition, the engine coolant will require change sooner-at 50 000 km (30,000 mi) or 24 months. Notice Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems. 8) Close the radiator drain plug. Tighten. Tighten the radiator drain plug to 2 N•m (18 lb in). 9) Fill the cooling system through the surge tank. 10) Fill the cooling system with a 50/50 mixture of DEX-COOL® coolant and deionized water. 11) Start the engine. 12) Allow the engine to idle for 1 minute. 13) Install surge tank cap. 14) Cycle the engine RPMs from idle to 3000 in 30 second intervals until the coolant temperature reaches 99°C (210°F). 15)Shut off the engine. 16) Remove the surge tank cap. 17) Start the engine. 18) Allow the engine to Idle for 1 minute. Fill the surge tank to 12.7 mm (0.5 in) above the COLD FULL mark on the surge tank. 19) Install the surge tank cap. 20) Cycle the engine RPMs from idle to 3000 in 30 second intervals until the coolant reaches 99°C (210°F). 21) Shut off the engine. 22) Remove the surge tank cap. 23) Top off the coolant as necessary, 12.7 mm (0.5 in) above FULL COLD mark on the surge tank. 24) Rinse away any excess coolant from the engine and the engine compartment. 25) Inspect the concentration of the engine coolant. 26) Install the surge tank cap. Reply 1 1 acrace Gideon's_Test View Public Profile Send a private message to Gideon's_Test Visit Gideon's_Test's homepage! Find More Posts by Gideon's_Test Nov 3, 2017 | 01:08 PM Share Share Options #3 Ironworker48okc 8th Gear Joined: Oct 2017 Posts: 8 Likes: 0 How much air could possibly be in my cooling system? I've been bleeding it for almost 15 minutes and its still hissing out of the crossover lines from the heads... Reply 0 0 Ironworker48okc View Public Profile Send a private message to Ironworker48okc Find More Posts by Ironworker48okc Nov 3, 2017 | 02:17 PM Share Share Options #4 neutron82 Race Director Joined: Dec 2010 Posts: 10,362 Likes: 1,268 From: Atlanta, GA 2020 Corvette of the Year Finalist (performance mods) C5 of Year Winner (performance mods) 2019 all I do is leave the reservoir cap off and let the car idle for a good 20-30 mins, never had an issue doing it that way Reply 1 1 Corvette_Dave neutron82 View Public Profile Send a private message to neutron82 Find More Posts by neutron82 Nov 3, 2017 | 02:37 PM Share Share Options #5 Ironworker48okc 8th Gear Joined: Oct 2017 Posts: 8 Likes: 0 I'm sucking air into my cooling system from somewhere...possibly my thermostat housing from when I changed my thermostat and didn't get the bolts tight enough? Reply 0 0 Ironworker48okc View Public Profile Send a private message to Ironworker48okc Find More Posts by Ironworker48okc Nov 3, 2017 | 02:49 PM Share Share Options #6 SG Lou Safety Car Joined: Dec 2010 Posts: 3,938 Likes: 497 From: Fords, NJ Quote: Originally Posted by Ironworker48okc I'm sucking air into my cooling system from somewhere...possibly my thermostat housing from when I changed my thermostat and didn't get the bolts tight enough? If the housing bolt are loose I'd suspect it would be leaking coolant rather then sucking in air. Reply 0 0 SG Lou View Public Profile Send a private message to SG Lou Visit SG Lou's homepage! Find More Posts by SG Lou Nov 3, 2017 | 04:03 PM Share Share Options #7 Ironworker48okc 8th Gear Joined: Oct 2017 Posts: 8 Likes: 0 Was my thought as well sg Lou...here's the deal....when the car is idling and I have the crossover lines from head to head loose they never stop pushing air...I can kill the car and let it cool and completely fill everything with water while they are loose and it starts pushing water out after about 2 1/2 gallons....it runs at temp for about 20 minutes before starting to get hot again. Could that still be the surge cap? I have no clue about the hoses....will have to let the car cool and get back to you on that one. Reply 0 0 Ironworker48okc View Public Profile Send a private message to Ironworker48okc Find More Posts by Ironworker48okc Nov 3, 2017 | 04:40 PM Share Share Options #8 Ironworker48okc 8th Gear Joined: Oct 2017 Posts: 8 Likes: 0 Also forgot to ask if it would still suck air from the top if the cap is left off? Because it still moves air regardless...my thoughts would have been that it wouldn't be pressurized so it would just cycle the water without the cap on like any other vehicle...but I'm quickly finding out how temperamental these damn cars are! She has definitely earned her name "Agnus." Reply 0 0

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Ironworker48okc View Public Profile Send a private message to Ironworker48okc Find More Posts by Ironworker48okc Reply Subscribe Tags 2002, air, bleed, bleeding, c5, coolant, cooling, corvette, lines, purging, radiator, removing, replace, system, vette Back to Subforum C5 Tech View Next Unread Wipers won't Home when turned off Thread Tools Show Printable Version Search this Thread Click for Advanced Search Thread Tools Show Printable Version Email this Page Click for Advanced Search User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home New Member Intros In Memoriam In loving memory of lost CorvetteForum Brothers and Sisters C8 Corvette C8 Z06 Discussion C8 ZR1, ZR1X, and Zora Discussion C8 ERay/Hybrid/EV Discussion C8 General Discussion C8 Tech/Performance C8 Forced Induction/Nitrous C8 Corvettes for Sale C8 Parts for Sale/Wanted C8 Dealer Inventory C8 Vendor for Sale C7 Corvette, 2014 - 2019 C7 ZR1 Discussion C7 General Discussion C7 Tech/Performance C7 Z06 Discussion C7 Forced Induction/Nitrous C7 Dealer Inventory C7 Corvettes for Sale C7 Parts for Sale/Wanted C7 Vendor for Sale C6 Corvette, 2005 - 2013 C6 Corvette ZR1 & Z06 C6 Corvette General Discussion C6 Tech/Performance C6 Scan & Tune C6 Forced Induction/Nitrous C6 Dealer Inventory C6 Corvettes for Sale C6 Parts for Sale/Wanted C6 Vendor for Sale C5 Corvettes, 1997 - 2004 C5 General C5 Tech C5 Scan & Tune C5 Forced Induction/Nitrous Performance Results C5 Corvettes for Sale C5 Parts for Sale/Wanted C5 Vendor for Sale C4 Corvettes, 1984 - 1996 C4 Tech/Performance C4 General Discussion C4 ZR-1 Discussion C4s for Sale/Wanted C4 Parts for Sale/Wanted C4 Vendor for Sale C3 Corvettes, 1968 - 1982 C3 Tech/Performance C3 General C3s for Sale/Wanted C3 Parts for Sale/Wanted C3 Vendor for Sale C1 & C2 Corvettes, 1953 - 1967 C1 & C2 Corvettes C1 & C2 Corvettes for Sale/Wanted C1 & C2 Parts C1 & C2 Vendor for Sale General Corvette Topics Autocrossing & Roadracing Autocrossing & Roadracing Classifieds Drag Racing Wheels & Tires Car Care Discussion Audio/Electronics Engine Mods Factory Correct Resto Paint/Body Auto Extras & Memorabilia Upcoming Events and Regional Discussion National Events NMCA C4/C5/C6 Shootout Northeast Southeast Great Lakes Northern California Southern California Pacific Northwest Southwest Mountain - Prairie Canadian Events Other Country Events Off Topic Photography F-Body General Discussion Other Cars Professional News, Articles, and Tips Ask Tadge Ken's Newsletters CorvetteForum Newsletter Archive Help & Feedback Help Forum Forum Guidelines and Rules Transactions Feedback Testing Reply Closed Thread Share

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