how do i bleed the cooling system on a 89 civic dx
Also what is a eacv?

 

The easiest way is to start the car when cold, turn on the heater and indoor blower at full speed, remove the cap from radiator, let it warm up and when you don't see anymore bubbles you're done.

EACV is also known as IACV idle air control valve

 

how do i clean the iac?

 

Remove it and spray carb cleaner on the screen. Also clean the air passages on the intake manifold while it's off.

 

with engine cool, remove radiator cap, set the heater temperature lever to maximum heat - follow upper radiator hose to where it connects to the water outlet on the engine - you will see a bleed bolt on top of the water outlet - loosen the bolt - slowly pour coolant into radiator until coolant comes out of bleed valve - tighten the bolt as soon as coolant runs out in steady stream with no air bubbles - fill radiator to bottom of filler neck and fill plastic overflow bottle to the full line - with radiator cap off, start engine and let it run until warmed up (fan goes on at least twice) - if necessary, add more coolant to bring it up to the bottom of the filler neck -replace radiator cap

 

Either way you'll get the same result. My way doesn't require tools

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eda6 &raquo;</TD></TR><TR><TD CLASS="quote">Either way you'll get the same result. My way doesn't require tools </TD></TR></TABLE>
also doesn't get the air out

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jlicrx &raquo;</TD></TR><TR><TD CLASS="quote">
also doesn't get the air out</TD></TR></TABLE>

How do you figure? Air rises right? The neck of the radiator is higher than the bleed port. So therefore, all air in the system will come out of the radiator fill neck.

 

OR u can just do what i do. Just fill the radiator up to the top. Squeeze the lower and upper radiator hoses multiple times to work air pockets out. Refill radiator as necessary. Put on radiator cap. Start car and drive it normal for a day or two. Check coolant reservoir and top up if necessary.

 

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just fill it up and let the car run w/ the heater on until no more bubbles.