cooling system issues
cooling system issues so i got done with my head swap a few days ago and i finally got a new coolant temp sensor since i broke mine on install.
when i start my engine and let it idle, the coolant temp rises to 210* pretty fast. after 210*, it still rises, but i shut down my car to prevent it from overheating. im trying to figure out why the temp is rising so fast. could it be a faulty thermostat? a bad water pump? air in the cooling system?
when i start my engine and let it idle, the coolant temp rises to 210* pretty fast. after 210*, it still rises, but i shut down my car to prevent it from overheating. im trying to figure out why the temp is rising so fast. could it be a faulty thermostat? a bad water pump? air in the cooling system?
Probably air still trapped in the system. I always use a a fill jug similar to this one:
http://www.denlorstools.com/home/dt1/page_2420_36
It attaches to the fill cap (no leaks) and you fill up the funnel, then when the cooling system burps it auto fills. Works fairly well.
http://www.denlorstools.com/home/dt1/page_2420_36
It attaches to the fill cap (no leaks) and you fill up the funnel, then when the cooling system burps it auto fills. Works fairly well.
All you have to do is bleed the system of all the air and top the coolant off.
With the engine cold. Top the coolant off about 2-3 inches from the top of the radiator fill cap.
Then start the engine and wait for the t-stat to open. While you're waiting squeeze the upper radiator hose rapidly about 20 times, then do it to the lower hose. Just don't do it to where the coolant shoots out the top of the radiator fill cap.
Works every time to get all the air out. When the level drops after the t-stat opens, top it off and you're done.
With the engine cold. Top the coolant off about 2-3 inches from the top of the radiator fill cap.
Then start the engine and wait for the t-stat to open. While you're waiting squeeze the upper radiator hose rapidly about 20 times, then do it to the lower hose. Just don't do it to where the coolant shoots out the top of the radiator fill cap.
Works every time to get all the air out. When the level drops after the t-stat opens, top it off and you're done.
All you have to do is bleed the system of all the air and top the coolant off.
With the engine cold. Top the coolant off about 2-3 inches from the top of the radiator fill cap.
Then start the engine and wait for the t-stat to open. While you're waiting squeeze the upper radiator hose rapidly about 20 times, then do it to the lower hose. Just don't do it to where the coolant shoots out the top of the radiator fill cap.
Works every time to get all the air out. When the level drops after the t-stat opens, top it off and you're done.
With the engine cold. Top the coolant off about 2-3 inches from the top of the radiator fill cap.
Then start the engine and wait for the t-stat to open. While you're waiting squeeze the upper radiator hose rapidly about 20 times, then do it to the lower hose. Just don't do it to where the coolant shoots out the top of the radiator fill cap.
Works every time to get all the air out. When the level drops after the t-stat opens, top it off and you're done.
JUst keep squeezing the upper and lower radiator hoses till the t-stat opens.
Also, this has worked for me everytime I've drained my system. Just make sure you walk back and forth watching your temp guage just to make sure you're not sitting there overheating. If your temp guage gets past the 215 mark, its not working.
Usually idling, it'll open in about 10 minutes or so for a stock t-stat. 8 minutes for a 160.
Also, this has worked for me everytime I've drained my system. Just make sure you walk back and forth watching your temp guage just to make sure you're not sitting there overheating. If your temp guage gets past the 215 mark, its not working.
Usually idling, it'll open in about 10 minutes or so for a stock t-stat. 8 minutes for a 160.
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Anyway, at least its ok now.
Last edited by LS6427; Jun 5, 2009 at 03:04 PM.
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My guess is that there wasn't enough coolant in the engine to get to the t-stat. The same **** happened to me a month or so ago. I put almost a gallon of coolant/water in the engine by using the upper radiator hose.
i forgot to add that they also said the thermostat was stuck open. all should be good; picking it up in 15 min
If it stuck open you wouldn't have had any over heating issue and the air bubbkes would not get caught in front of it. You had an air bubble that wasn;t allowing the t-stat to open so the coolant could flow.
Thats why some poeple drill a small hole in their t-stat, so air bubbles can never be an issude for them, the air would escape through the hole.
But thats how mechanics make their money.
