Coolant flow - Team Camaro Tech
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post #1 of 15 (permalink) Old Aug 13th, 18, 02:46 PM Thread Starter
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Coolant flow

I filled the upper rad hose into the engine with a gallon of antifreeze hoping I wouldn’t have any coolant flow issues as I’ve seen guys have. Well another bug I need to iron out. What did you guys do? Rad is cold to the touch. Engine around 200 degrees. Thx

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post #2 of 15 (permalink) Old Aug 13th, 18, 02:52 PM
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Re: Coolant flow

LS crate engines come with a 195 thermostat if I remember right. Did you change it to something lower? It is leveling off at 200 or are you shutting it off at 200?

Don

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post #3 of 15 (permalink) Old Aug 13th, 18, 03:12 PM
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Re: Coolant flow

Pull the radiator cap and verify coolant is flowing

Squeeze the radiator hoses to see if firm with engine running.

And Don is correct. Factory T-Stat is 192*.

What are you using for a gauge?

Is this driving on running in the garage?

Are your fans turning on?

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post #4 of 15 (permalink) Old Aug 13th, 18, 04:44 PM
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Re: Coolant flow

When filling the cooling system, you need to fill the radiator to about 1" from top, start the car, let it come up to temperature. When the thermostat opens, you might get a over flow with the escaping air (normal), then just add coolant until you're back to about 1" from filler neck.

Sometimes air will get trapped causing hot spots/overheating issues. Raising the front of the car helps most of the time to "burp" the air.

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post #5 of 15 (permalink) Old Aug 13th, 18, 04:44 PM Thread Starter
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Stock thermostat, running in garage. I turned it off at 200. Thx guys.

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post #6 of 15 (permalink) Old Aug 13th, 18, 04:46 PM Thread Starter
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Rad cold to touch. Fans never came on.

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post #7 of 15 (permalink) Old Aug 13th, 18, 05:08 PM
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Re: Coolant flow

Then it's not flowing coolant yet. Coolant is not reaching the temp sensor yet ot the t-stat

After shut off for a while start it again. When temps come up pump the hoses with your hand. Squeezing bottom hose like a dozen times, then the top hose.

Works every time for me.

You said you added a gallaon through the top hose.

How much did you put into the radiator?
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post #8 of 15 (permalink) Old Aug 14th, 18, 06:38 AM Thread Starter
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I added another gallon to radiator. Thx John

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post #9 of 15 (permalink) Old Aug 14th, 18, 07:33 AM
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Re: Coolant flow

Make sure you have your heater turned on. Flowing water through the heater core helped me get the air bubbles out too.

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post #10 of 15 (permalink) Old Aug 14th, 18, 09:20 AM
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Re: Coolant flow

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I added another gallon to radiator. Thx John
I donít think that is enough. Fill it until you cover the radiator core tubes.

Don

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post #11 of 15 (permalink) Old Aug 14th, 18, 01:41 PM Thread Starter
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Thx Don, yeah it’s full.

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post #12 of 15 (permalink) Old Aug 14th, 18, 03:15 PM
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Re: Coolant flow

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Thx Don, yeah itís full.
Pretty sure that I used more than 2 gallons. It will take more when the thermostat opens. Keep the cap off and let it come up to temperature. Then squeeze the hoses as John said.

Don

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post #13 of 15 (permalink) Old Aug 14th, 18, 03:45 PM
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Re: Coolant flow

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Pretty sure that I used more than 2 gallons. It will take more when the thermostat opens. Keep the cap off and let it come up to temperature. Then squeeze the hoses as John said.

Don
I find squeezing with the cap on helps force the air. If cap off the coolant comes out the top.

I squeeze a bunch then take the cap off to check for flow and coolant level.
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post #14 of 15 (permalink) Old Aug 14th, 18, 04:28 PM Thread Starter
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Thx guys.

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post #15 of 15 (permalink) Old Aug 18th, 18, 12:14 PM Thread Starter
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Re: Coolant flow

Thanks everyone for the help. Squeezing the lower hose seemed to do the trick and I also added some more antifreeze from the upper hose. I have coolant flow now and all the air is out.

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