This motor is a d15b8 in a 94 cx and we replaced the thermo with a honda thermo(it opens) new headgasket (we resurfaced the head) and radiator. it doesnt smoke at all and i let the car run for like 15mins but the fan wont cut on and the return coolant hose is cold and the top one is hot. i pull the return hose out when the car was warm and still no coolant come out. Its not overheating. Any ideas on what this could be?

 

did you install the thermostat correctly with the pin up ?

 

did you install the thermstat correctly? somethings not right in the cooling system. did you happen to replace the water pump?

 

yes i did the pin is up and the spring is facing toward the inside

 

I dont see a problem here, if its not over heating their is no problem, 99% of the time my lower radiator hose is completly cool on my itr

 

but i ran the car for 20 minutes and i pull the hose off to see if any colant is coming out and none and the fan doesnt come on at all.....

 

Sounds like your coolant isn't circulating, possible due to the fact that the thermostat isn't opening. Sometimes when you replace the thermostat or do other work on your coolant system, an air pocket forms up on the block side of the thermostat. The air doesn't get hot enough to open the thermostat, so it stays closed. To fix the problem, you need to bleed out the air using the bleeder valve.

 

did that too.. i tried bleeeding it..

 

so it's not overheating? maybe you're just not letting it run long enough to open the therm and cut on the fan.

 

ok now the return pipe is hot but still not fan....

 

so? the fan doesnt HAVE to come on.. lol. your cooling system is working good. leave it alone and just watch your heat for the first few days. Your fan probably wont come on unless you just got done beating the crap out of your car.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jh &raquo;</TD></TR><TR><TD CLASS="quote">ok now the return pipe is hot but still not fan....</TD></TR></TABLE>

First time I changed the coolant in my car, I thought there was a problem too. To get the return line flowing and fan to come on, you have to run the car at high idle for about 20 minutes or so, or just drive around for a while. It takes alot longer than I thought it would. I'm pretty sure you're fine.

 

it takes a long time for a hondas cooling fan to turn on unless you were driving hard or if it is overheating. My car never overheats and my cooling fan bairly ever tunrs on.

 

thanks eveyone i drove it hard for10 minutes and pulled over and i was looking at it and was abou to stick my finger in the fan to spin it and as soon as was about to try it turned on

 

yikes, good thing you still have some fingers left.

 

yeah i know

 

Paranoid people are funny.

And never stick your hand in a fan when theres a good chance that it could come on. Thats just common sense.... to most.

 

when you changed it and filled it with coolant, did you have the heater set on hot and blowing high with the raditor car off ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by drtyhatch &raquo;</TD></TR><TR><TD CLASS="quote">yikes, good thing you still have some fingers left.</TD></TR></TABLE>

I beleive that's why there's the large yellow warning sticker on the shroud

 

if no coolant runs to the lower coolant hose- and the thermostat is right probably wp- imo but i didnt read the whole post sollie !