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Engine overheating?

 
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Impala_03
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PostPosted: Sun May 12, 2013 8:47 pm    Post subject:  Engine overheating? Reply with quote

any idea why my coolant is boiling?

It shows the needle in normal rage. Just slightly above the middle.

it's about 100F outside lucky I made it home when it started boiling. I had the A/C on too.


fyi it started boiling after a turned off the engine.
I resonantly change out the reservoir/overflow hose as well. could it have "air in the system?" that is when it started doing this

I think the water ratio is too high








I think the issuehas been solved by bleeding the air out of the hose and adding pure coolant
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SuperImpala00
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PostPosted: Mon May 13, 2013 12:02 am    Post subject:   Reply with quote

I'd probable do a full drain and get the right mix of 50/50 dexcool and water.
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Impala_03
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PostPosted: Mon May 13, 2013 12:40 am    Post subject:   Reply with quote

SuperImpala00 wrote:
I'd probable do a full drain and get the right mix of 50/50 dexcool and water.
Going to do that since the hoses are soft and spongy for the lower and upper ( two Large ones)
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Pitch Black SS
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PostPosted: Mon May 13, 2013 11:45 am    Post subject:   Reply with quote

if the coolant is old and/or diluted, it will boil.

after a certain amount of years, coolant breaks down and it becomes no better than running straight water. Coolant raises the boiling point of water which keeps it from boiling.

The radiator cap can also be failing. If the pressure isnt kept at its proper PSI, it will boil. The pressurized system raises the boiling point even further.

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Impala_03
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PostPosted: Wed May 15, 2013 2:03 am    Post subject:   Reply with quote

Pitch Black SS wrote:
if the coolant is old and/or diluted, it will boil.

after a certain amount of years, coolant breaks down and it becomes no better than running straight water. Coolant raises the boiling point of water which keeps it from boiling.

The radiator cap can also be failing. If the pressure isnt kept at its proper PSI, it will boil. The pressurized system raises the boiling point even further.


cap is brand new(few months old.) adding new coolant and removing the air fixed it.
I used up about 1/2 gallon.

I do not think the coolant is too old since it's "clean".


How much will I need when I get it flushed?
2 gallons of distilled and 2 gallons of Prestone dex-cool(Not 50/50)?



I was planing on getting it changed with(Prestone Dex-Cool) as I'm installing new hoses the the lower and upper radiator. Both hoses are soft and spongy, would it be wise to change out the thermostat as well?..
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Lingenfelter
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PostPosted: Wed May 15, 2013 11:53 am    Post subject:   Reply with quote

Impala_03 wrote:
Pitch Black SS wrote:
if the coolant is old and/or diluted, it will boil.

after a certain amount of years, coolant breaks down and it becomes no better than running straight water. Coolant raises the boiling point of water which keeps it from boiling.

The radiator cap can also be failing. If the pressure isnt kept at its proper PSI, it will boil. The pressurized system raises the boiling point even further.


cap is brand new(few months old.) adding new coolant and removing the air fixed it.
I used up about 1/2 gallon.

I do not think the coolant is too old since it's "clean".


How much will I need when I get it flushed?
2 gallons of distilled and 2 gallons of Prestone dex-cool(Not 50/50)?



I was planing on getting it changed with(Prestone Dex-Cool) as I'm installing new hoses the the lower and upper radiator. Both hoses are soft and spongy, would it be wise to change out the thermostat as well?..



If you're buying pure coolant and regular distilled water, the mix is 50/50.

Coolant can appear clean even if it's old. It's a chemical substance and the chemicals lose their effectiveness in time.

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