3rd Gen / L98 Engine Tech 1982 - 1992 Engine Related

Radiator Flush?

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Old Sep 9, 2003 | 06:29 PM
  #1  
dj haf's Avatar
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Radiator Flush?

today my iroc overheated and stalled in the middle of the street. untightened the cap and all of hell excaped from my radiator, lmao

someone jumped started me and it worked fine, but i have water in the radiator and i want to replace it with coolant. where is the valve to flush the radiator located? thanks for the help!
Old Sep 9, 2003 | 07:32 PM
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Rice Killer87's Avatar
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theres a pet **** on the bottom right (driver side) on the bottom of the radiator,loosin it and the rad. will drain
Old Sep 9, 2003 | 08:27 PM
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NEVER and i repeat NEVER open your radiator cap when the car is warm.....you got lucky next time youll probably have scalding hot radiator fluid spray you in the face.
Old Sep 9, 2003 | 08:34 PM
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Originally posted by doug791
NEVER and i repeat NEVER open your radiator cap when the car is warm.....you got lucky next time youll probably have scalding hot radiator fluid spray you in the face.
I hope you don't speak from experience?
Old Sep 9, 2003 | 09:23 PM
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Originally posted by Rippin92RS
I hope you don't speak from experience?
nope from rumor.....im smart enough that i spent the extra dollar fifty on the cap that has a little thing i can flip open to vent it before i open it.
Old Sep 9, 2003 | 11:46 PM
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lol i did it but i backed away fast as hell because i knew it was going to gush out like it did

i put new coolant in the car and the damn car died on me at the gas station. it started to bog a lil right when i pulled in so i turned it off to put gas, and when i tried to turn it on, it would click, but it wouldn't start. had to jump start it again, lol. i think its got to do with my battery and my radiator... cuz why else would i over heat? im totally lost here... maybe someone can help me, lol

Last edited by dj haf; Sep 10, 2003 at 12:49 AM.
Old Sep 10, 2003 | 12:48 AM
  #7  
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Get yourself a Prestone flush kit and backflush the radiator,then find out why it overheated.

T.
Old Sep 10, 2003 | 08:54 AM
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Aside from a possible bad water pump or thermostat,you may want to take your car to a radiator shop to professionally flush the engine and radiator.It's to get all of the hidden junk out of the entire cooling system.
Old Sep 10, 2003 | 10:28 PM
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i flushed it and now it's doing fine i think it helped though that i rigged the 2nd fan to turn on when i start the engine if you think about it... what does a fan cost? not that much... so if it goes bad, i'll just replace it. it's better than having to buy a new radiator cuz the damn thing overheated
Old Sep 11, 2003 | 06:16 PM
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use the radiator drain at the bottom to get all the fluid out of the radiator and then disconect the hose at the bottom of the radiator and stick your garden hose in to flush out ALL the crap and rust and you might even find sand from when the engine was cast it will come out of the radiator when it comes out clear then your good to go. and dont forget to fill it back up eith coolant then your really good to go.
Old Sep 11, 2003 | 06:31 PM
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I have used the Prestone heavy duty stuff that works well. It comes in a can. You open one end and it is the acid wash and the other is the neutralizer. You first flush all the coolant out of the radiator which is easy to do this time of the year and drive it for an hour. Flush and neutralize. Drive it for a bit, flush refill with coolant.
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