h22a overheat - Honda Prelude Forum

bb4mark · 09-27-2005, 11:31 PM

to start off i have a 92 prelude si originally had the h23 i took that out swapd in the h22a got the headgasket changed new thermostat and housing changed but it over heats at idle......when i turn off the car the fan comes on but when the car is on the fan doesnt come on im using the h23 wiring harness i dont know if that helps any....i also jumpd the thermostat wires to see if the fan would come on and it does many people tell me to just leave it like that but i dont want it to be riggd....if anyone can help me and let me know whats wrong with it please let me know.....please help

TruNinja619 · 09-28-2005, 01:23 AM

buy a Koyo radiator w/ FAL slim fans...

solve all your problems... hehe..

but really... could be your radiator..

Lucke · 09-28-2005, 04:39 PM

sounds almost like you have the fans hooked up wrong. but that would be too simple of a solution.

Rudaluda · 09-28-2005, 04:47 PM

if you have a helms it tells you how to test the fans, idk just idea.

bb4mark · 09-28-2005, 09:13 PM

thanks for the opinions guys as soon as i get rid of this pink eye ill start testing my radiator could there also be anything else besides the radiator?

blacklude4k · 09-29-2005, 02:32 AM

Ive replaced the thermo, both fan switches, my radiator and my fans and my car is still over heating. I have a h22a swap as well. So if you figure it out let me know.

SoFlaLude · 09-29-2005, 08:18 AM

Just outta curiosity, but are you running the VTEC radiator? I remember there was a thread here recently about someone's car overheating after swapping in an H22, and it came down to swapping out the radiator because the VTEC radiator is a dual-core and the Si is single.

blacklude4k · 09-29-2005, 10:55 AM

Ya that was me. I replaced the radiator with a vtec one and it didnt over heat for around two weeks now its back to its old tricks again, just doesnt over heat as quickly now.

bb4mark · 10-05-2005, 01:07 AM

yeah i have the old si radiator....i was thinking it may be cloggd.....but i think ill go ahead and buy a new vtec radiator and see what that does but like blacklude said it went back to being the same...whats up with the jdm h22's i read a lot about them over heating

petern101 · 10-05-2005, 10:39 AM

^^i'm about to find out too

just finished the h22a swap yesterday, i'm hoping it won't overheat too much

Xander · 10-05-2005, 03:55 PM

Sounds like the wiring for the fans isn't correct. I'd go back and check that. Like someone else said, the helms has a test you can go through. If the fans aren't turning on while the car is runing, that is not good. They're suppose to.

blacklude4k · 10-05-2005, 04:15 PM

i think its because the jdm ecu doesnt control the fans like the usdm ecu does, at least thats my theory from going thru lots of threads about the swaps over heating. Also i think my problem could be the head gasket, cause i check my coolent and i had to add about 2 liters of coolant. How hard is it to get to the head gasket, ive never done it on this engine.

95LudeS · 10-05-2005, 11:02 PM

i had a S and swapped the h22a, and swapped out the radiator with a CSF Radiator, and it hasn't given me any problems.

ds2000 · 10-10-2005, 06:19 AM

Hows the waterpump behaving?

red92s · 10-10-2005, 06:55 AM

This is a very common problem without a clearcut solution