overheating, need help!

[bryanti123]

iv been out of service now for two moths with my 99 silverado...waiting for parts for my cam swap. i swapped in an ls1 hot cam into my gen III 5.3 and it started up first crank! now I have a bigger problem, overheating. i already swapped my thermostat and that wasn't the problem. i heard something about air in the radiator maybe? im guessing its a coolant problem because the fan is moving fine. anyways, any suggestions would be greatly appreciated! thanks.

[mongoose90584]

Air is a bad thing in your coolant system. Try having it flushed or here is what i did. I just squeezed all the hoses until i did not see my soolant level drop any more. Some one else may have another idea but that is just what i did.

[bryanti123]

<div class='quotetop'>QUOTE(shwarmy &#064; Apr 3 2007, 03&#58;50 PM) [snapback]88385[/snapback]</div>

Air is a bad thing in your coolant system. Try having it flushed or here is what i did. I just squeezed all the hoses until i did not see my soolant level drop any more. Some one else may have another idea but that is just what i did.
[/b]

I actually did that and its still doing the same thing, I honestly don&#39;t think that is the problem, but thanks&#33; Would anyone know of anything else?

[RedHeartbeat]

Take the upper rad hose off on the rad end and then pour coolant down the hose as you hold it up in the air. Simple fix.

[txarkitekt]

<div class='quotetop'>QUOTE(99nastyss &#064; Apr 3 2007, 05&#58;38 PM) [snapback]88383[/snapback]</div>

iv been out of service now for two moths with my 99 silverado...waiting for parts for my cam swap. i swapped in an ls1 hot cam into my gen III 5.3 and it started up first crank&#33; now I have a bigger problem, overheating. i already swapped my thermostat and that wasn&#39;t the problem. i heard something about air in the radiator maybe? im guessing its a coolant problem because the fan is moving fine. anyways, any suggestions would be greatly appreciated&#33; thanks.
[/b]

Do what Red said, but if that still doesn&#39;t work, try replacing all the hoses directly related to the coolant system. There may be a hairline fracture or crack in a hose letting the air in on the top of the hose. Do you see any coolant leaking anywhere? Or is it low on coolant? Are you using the recommended Dex-cool (orange colored) coolant?

[gearheadnate]

I like to drill two small (1/8")holes in the stat flang to alow air to purg out during the initial fill.

[RedHeartbeat]

I also remove the air bleed hose from the heads while filling. Once the coolant runs out the air bleeds without air bubbles I call it good and put the air bleed hose back on and re-attach the rad hose and then continue filling the rad up to full.

[bryanti123]

thanks for all the feedback but i found that it was a much BIGGER problem, warped heads&#33; lol, it sucks, ill have them shaved and i guess it just a plus for my n/a silverado, increased compression&#33; lol thanks&#33;

thanks for all the feedback but i found that it was a much BIGGER problem, warped heads&#33; lol, it sucks, ill have them shaved and i guess it just a plus for my n/a silverado, increased compression&#33; lol thanks&#33;

thanks for all the feedback but i found that it was a much BIGGER problem, warped heads&#33; lol, it sucks, ill have them shaved and i guess it just a plus for my n/a silverado, increased compression&#33; lol thanks&#33;

thanks for all the feedback but i found that it was a much BIGGER problem, warped heads&#33; lol, it sucks, ill have them shaved and i guess it just a plus for my n/a silverado, increased compression&#33; lol thanks&#33;