after jdm swap fan staying on after car is off - Honda Prelude Forum

petern101 · 10-06-2005, 08:48 AM

ok seems like everyone who has a jdm swap has a problem with overheating and such with the standard h23 radiator. i don't seem to be overheating but my car's fans are turning on after the car is turned off, i faintly remember someone asking if this was ok and most ppl said it was normal

well its turning on my fans so much that its draining my battery and the car barely starts

should i get a new radiator asap?

Paul H22 · 10-06-2005, 08:53 AM

You could install a kill switch and cut power to the battery every time you stop that car.

Yea, or you could fix it correctly with suggestions that others will provide below.

petern101 · 10-06-2005, 08:54 AM

like buy a better radiator? i'm gonna order one btw asap

Paul H22 · 10-06-2005, 08:55 AM

Get something aluminum.

petern101 · 10-06-2005, 01:56 PM

no other suggestions?

i really need to fix this.......and honestly i doubt a new radiator will solve the problem cause it seems like a common problem on swapped ludes

SNsLude · 10-06-2005, 03:27 PM

New battery? My fans come on often after the car is off and never gets to the point where it almost drains the battery

blacklude4k · 10-06-2005, 03:52 PM

Im swapped and my fans seem to only come on when the car is off but never where they drain the battery

LUDE'Z · 10-06-2005, 04:51 PM

Recently my fan has been going off to after shutting off the car. Except I have a USDM H22a1.

The other day I parked the car and was walking home when the fan went off and some kids walked by and said, "Cool..your car starts by itself too?"

blue92ludesi · 10-11-2005, 02:01 AM

my h23a1 did that, i guess its the vtec timer. gtta cool down that vtec yo LOL

petern101 · 10-11-2005, 09:44 AM

hmm i got a vtak timer??? NICE!!!!

lol i just put in a optima redtop battery and its been starting up fine........i just need to fix the hesitation problem

ViZ · 10-11-2005, 11:53 AM

i swapped from a single cam and i have no problem with mine over heating or running the radiator to long. in fact it runs cooler now.. and the only thing i did was use water wetter in the stock system

Lucke · 10-11-2005, 02:41 PM

i'm not having any problems with my swap... my fans work perfectly (they turn off when the car turns off), and no problems overheating unless i'm really low on coolant.

might want to check your wiring before anything else.

LUDE'Z · 10-12-2005, 10:47 AM

Quote:

Originally Posted by ViZ

i swapped from a single cam and i have no problem with mine over heating or running the radiator to long. in fact it runs cooler now.. and the only thing i did was use water wetter in the stock system

So it could be the radiator that causes the fan to go off? I guess I should check my coolant level again.

What do you mean by using "water wetter in stock system?"

petern101 · 10-12-2005, 11:11 AM

water wetter is an additive that comes from redline products

yeah i used it before i did the swap.......honestly since the dang 4th gen coolant gauge has only 4 positions, it didn't show a difference

and the stuff AT BEST decreases the temp. by 10 degrees fairenheit (and that is running 100% distilled water + water wetter for race engines or temporary)

as for using in regular times.......they showed it helped ~5 degrees, i might use it again but as for right now i think its not worth the price

as far as the fans staying on, it hasn't done it ever since i changed o2 sensors, new battery, and the weather just got alot cooler

so after xmas i will buy a better radiator