Over flow tank causing blowing head gaskets.
#11
well if allowed to go long enough i suppose the coolant level could get low enough to somehow get a bubble into the head/s in the right spot to cause a overheat issue and could cause a weak headgasket to fail. alot of couldoves there
#14
Join Date: Nov 2007
Location: Eastern PA,
Posts: 10,351
On an old school car removing the overflow will not hurt anything. Once the car reaches hot soak it pretty much has all the coolant it needs, hot. The main reason for the return system is humans. They see the radiator "low" when its cold and they add coolant. That coolant ends up on the ground. Coolant is very bad for the environment. Without the coolant overflow an old school system will regulate itself. This is not because of the tempters the system run at. Anyone who owned a big block stuck in a traffic jam in the 70's knows how hot they can get. The only what the system would need coolant add would be if there was something wrong with the car and it got a good 20 degs hotter then what it considered "normal" hot soak.
As a general rule on old school cars the highest point in the coolant system is the top of the radiator. This is why the system does need bled. Since the highest point in the system is the radiator cap that is where air ends up. LT1's needs to be bleed. So if the system goes low every time the car cools down it could trap air in the system. The trapped air can cause a blown head gasket.
As a general rule on old school cars the highest point in the coolant system is the top of the radiator. This is why the system does need bled. Since the highest point in the system is the radiator cap that is where air ends up. LT1's needs to be bleed. So if the system goes low every time the car cools down it could trap air in the system. The trapped air can cause a blown head gasket.
#16
https://camaroforums.com/forum/membe...3-94-15717.jpgThe Camaro's heater lines leave the heater and drop down to the frame, then one line go's up to the water pump. The other returns at lower location back to the water pump.This means that there will be trapped air in the heater core.
You'll need to remove the heater core cover inside the car and tap the heater core with a soft rubber mallet to get the air out, with the engine off. Then with the engine on and hot you can tell if there's air trapped in the heater core by feeling for cold areas in the core. When there's no more cold areas the trapped air is out and then use the heater air bleed valve to remove the air. If this dose not work you may have a clogged heater core.
The v8 cars are a pain to bleed all the air out but it must be done.
You'll need to remove the heater core cover inside the car and tap the heater core with a soft rubber mallet to get the air out, with the engine off. Then with the engine on and hot you can tell if there's air trapped in the heater core by feeling for cold areas in the core. When there's no more cold areas the trapped air is out and then use the heater air bleed valve to remove the air. If this dose not work you may have a clogged heater core.
The v8 cars are a pain to bleed all the air out but it must be done.
Last edited by VALHAR; 11-15-2014 at 08:34 PM.
#18
what would tapping with a rubber mallet do? does the air bubble get stuck to the side of the heater core and you have to knock it loose? There's a procedure for bleeding the coolant lines on shbox.com and it works great, no need for a mallet.
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sideways
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02-17-2012 11:53 AM