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problem with over heating.
changed radiators and thermostats. the pickup gets hot after idiling for 30 min. I took the cap off and the water would rise to the top and suck back in. did this about 20 times. I put the cap back on and it overflowed.
is it the thermostat opening and closing over and over?
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come on anyone? it's blown 7 radiators. changed water pump. several thermostats, and finally went to a bigger radiator. what else could it be?
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Blown 7 radiators? You have a compression leak. Get a block tester from autozone. If it fails, pull the heads and check the block (cylinders), the head gaskets, and the heads.
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yeah I just assumed that it was cheap autozone radiators. thanks nathan I knew you'd know the answer
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what do I do if it doesnt fail? something tells me that you already know that it is going to fail......if it does i'm not messin with it. I'll throw it away like you advised me and start lookin for a 6.0
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Dang....then the parts come into serious question as does the installer. 
Bet there's an issue.
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lol funny. told you. you know its goin to fail before i test lol. i just wondered if I can trust these cheap thermostats. I never trust anything from autozone or oriellys like that.
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i'm goin the more optimistic route and trying a a/c delco part then when i'm wrong........go to auto zone get a block tester and when it fails....pull the heads off because I have a compression leak......theres no middle finger smiley lol
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Air pockets are easy to get on the engines with the tstat mounted so low but "blowing out" multiple radiators is scary to me.
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yeah but you know. I went to the bigger radiator availble for the '85 thats for the diesel/ 454. its doin better then it was. it was blowing em after idling for 30 min. when I was 17 I took it to a mechanic. he told me it was leaking oil. duhhhh. and?
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