Ok so here is my predicament. Just did my JDM H22 swap in my 97 Accord LX. Problem is misc. heating up. A few examples would be driving on the highway at about 80/85 MPH the gauge was sitting at 1/2 when usually the gauge never budged above above a lil over a 1/4. When I started hauling *** on the highway it raised even more above 1/2 so I slowed it way down and it eventually went down to 1/2 which is still high!
So to try and fix the problem I changed out the thermostat with a Autozone one and it still did it so I threw in the stock one again. So then I thought that the radiator needed a coolant flush so I got one done and filled it with 50/50 mix again. Everything was fine until it did it again. This time was around town normal driving with the A/C on(And Yes BOTH fans were on) So I turned the A/C off and the problem went away. So to try and show my buddy who owns a shop the problem I beat the crap out of it for like 10 minutes straight and no heating issues. This has boggled my mind for weeks now.
Also to add to it.......both fans work but you know when you turn off your car if the temp is to high the fans will kick on by themselves and run for a while until the correct temp. well ever since the swap they have never come on, even if the temperature is above half, I have to sit there with the key on the ACC position until the fans stop by themselves when the car was to hot. So in conclusion Both fans work, thermostat was fine because I swapped it with a Autozone one and it did the same thing and the water pump seems to have good pressure and it doesnt raise temp at a light even if I sat there for 5+ minutes.
Also for a better description, yesterday it was raining out so I was using the A/C and it was muggier than hell outside(I live in FL.) and the temperature never even budged. This is the weirdest problem I have ever had. The ONLY thing I can think of is the sensor that we swapped over from my F22 to my H22 that controls the fans/thermostat. Any help would be DEEPLY appreciated. Thanks......sorry so long.

 

It's not the thermostat(since you said you got a new unit), it's not the water pump, it's not dirty coolant, not the fans/fuse.

two things i could think of right now, blown headgasket(not likely) and totally off the chart timing.

 

As for the head gasket, it is not smoking or using any water so your right I think that is out of the question, and for the timing, the distributor is pretty much right in the middle.

 

i mean is the timing off by alot?
running extremely lean?
anyone of those would overheat a car alone

 

I really have no idea what the timing on my car is even at. We swapped another H22 distributor in there and then swapped back to stock and just put it close to the middle...so the car has not had a timing gun on it yet. But I do have a a/f ratio gauge(yes i know they are garbage) but it doesnt seem to be running lean, it stays in the rich while floored.

 

Get yourself a timing light to see if your timing is advanced, retarded or right on.

Here is a great write up on how to check your timing
http://www.c-speedracing.com/h...g.php

 

ok kool, thanks!

 

Normally, I would agree that it's not your thermostat because you swapped it out with a new one, but you said you got one at autozone. I swapped out my thermostat with an aftermarket one and it only made the problem worst. I would suggest trying a Honda OEM thermostat. I bought a Honda OEM thermostat and it fixed the problem. You might also have multiple problems screwing things up all at the same time. I would agree to check the timing and also check for a possible blockage. A blockage would make your car overheat all the time, but you said you don't overheat while at idle. Wouldn't hurt to check though. Good luck.

 

oh yeah..one way to tell if the coolant is getting blocked is by crappy idle.

 

My idle is perfect......and it doesnt heat up all the time, i just drove it around for the past two days beating on it off and on and the temp. never moved. I still need to check the timing though.

 

its most likely the thermo, try taking the stock one and propping it open permanently by sticking a nut between the point and the needle that goes into the point, it seems like its the thermo cuz at 80 mph there is plenty of air hittin the radiator, so the only reason ur hot is cuz there is no coolant goin through the radiator....

someone did a test with a bunch of thermo's and most of the aftermarket ones didnt open til like 10-20 degrees after it should....