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{ Scaring babies and little old ladies with open headers since 1964 }
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{ Scaring babies and little old ladies with open headers since 1964 }

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Help with over heating issue.

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{ Scaring babies and little old ladies with open headers since 1964 } :: GARAGE :: Tech

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Help with over heating issue. Empty Help with over heating issue.

Post by Reb Stew April 17th 2013, 12:24 am

I got this in a PM and thought some of you guys could toss some ideas out.

On that 90 camaro of Chris's it running around 220-230 and spewing all the water back out of the over flow. We by passed the fan relay and went with a toggle. We also replaced the thermostat and flushed the system. Got any idea's Thinking maybe cap or water pump, but it seem to be moving around in the radiator and it's not leaking.
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Post by Marty042 April 17th 2013, 12:49 am

Thanks Steve.
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Post by 6-71Kid April 17th 2013, 1:30 am

My first thought would be trapped air.
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Post by Brownie April 17th 2013, 2:07 am

6-71Kid wrote:My first thought would be trapped air.
I think you hit the nail on the head.
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Post by 911TAZZ April 17th 2013, 2:15 am

I agree. Trapped air. I think o Reilly Carries a special no spill funnel that you can get just for that
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Post by Marty042 April 17th 2013, 2:56 am

Thanks guys. I'll try getting all the air out the system. See where that gets me. Keep y'all posted.


Last edited by Marty042 on April 17th 2013, 10:50 am; edited 1 time in total
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Post by junkyard junky April 17th 2013, 3:37 am

I was told to drill a small hole on the side of the thermostat to allow air to pass by when filling the system back up when installing a new one. did it on my wagon.

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Post by Arieldouglas April 17th 2013, 4:55 am

Isn't the heater higher than the motor? How about pulling a heater hose while filling it to let the air out?
AND a new cap?
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Post by Reb Stew April 18th 2013, 6:41 am

I think it's the cap.
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Post by RustyKarr April 18th 2013, 7:28 am

On a side note does it still have the lower air dam under the radiator that help catches air from under the car? I know without those they will tend to run hotter for sure because the grille opening is so small that not much air can get to the radiator on those Camaro's.

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Post by Marty042 April 18th 2013, 10:50 am

Yep still has the air dam. Gonna dig it to it more this weekend.
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Post by big dogs 42 April 18th 2013, 7:18 pm

Sounds like the caps bad. Im with Stewart but run a comp. check on the cyl if it keeps up could be head or intake gaskets.Oh yea the late model chevys were notoris for head cracks got to love them little bow ties lol!!! Very Happy
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Post by Marty042 April 21st 2013, 12:50 am

Got most of the air out of the system. It's running around 185-190. Still want to get a new cap anyway. cheers Now I need to look for a third gen overflow bottle.
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Post by Reb Stew April 21st 2013, 5:07 pm

Advance sells an aftermarket one if you can't find a stock one. I'm using one on my Fire Chicken.
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Post by Marty042 April 21st 2013, 7:55 pm

Cool! Thanks Steve. Have to check that out.
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