scoker83

iTrader: (1)

I have a 2000 Civic EX with a recent b18c spec r swap. I kept my stock cooling system but my fan wont kick on now.
I never had a problem before the swap, and it has only over heated once yesterday. It was crazy hot here in Florida and I was in stop and go traffic.
I kept the stock harness so shouldn't be any wiring issues, I assumed it was the coolant temp sensor so I changed that and still no fan.
I tried jumping the sensor plug and the fan kicks on no problem, so wiring should be good. Tested the relay and it's good.
I've read about the same problem but people ended up rigging the fan to work (stay on all the time) with no real solutions. ...
Any help would be great. Thanks

TNight

I have the same thing going on w/ my 98 Integra , I figured this is my weekend to figure it out. I'll be watching to see what suggestions come up. This is w/ my stock LS Motor

grumblemarc

iTrader: (4)

Didn't hear any mention about a thermostat or whether the system was bled.

scoker83

iTrader: (1)

Thermostat is good, system has been burped every time I've opened it up. I've checked and there are no leaks at all...
I have no idea what's going on...

grumblemarc

iTrader: (4)

When does it overheat?

scoker83

iTrader: (1)

Only in the middle of the day when it's really hot, a/c is on full blast, and there's no air flow (stop and go traffic)

Former User

When asking for help, terse responses don't advance your cause. Provide details:

How do you know?

How?

Have you pressure tested the cooling system?

tony_2018

Any maintenance done before the engine was dropped in? I have a feeling either the thermostat isn't opening up or the water pump is getting the fluids moving.

scoker83

iTrader: (1)

No I don't have a pressure tester. I have visually inspected every connection while running and everything looks good. I haven't been loosing any fluid.

Former User

Details...

New OEM thermostat?

What exactly is the Haynes bleed procedure for your engine? Is it the same as the service manual procedure?

scoker83

iTrader: (1)

I flushed the whole system,replaced the thermostat and hoses before dropping the engine in. I didn't mess with the water pump though. It seems to be circulating fine... I mean if you rev it with rad cap off coolant will spout out.

scoker83

iTrader: (1)

No it was a cheap pep boys thermostat.
* heater control on max temp
*connect spill free funnel
* top of coolant wait 5 min top off again
*start engine let run until no bubbles

I'm sure I missed something but that's the general procedure...
Am I missing something? Would a bad thermo even prevent the fan from kicking on? You can drive this thing all day but if you get stuck at idle for 15-20 min the temp will start to climb

scoker83

iTrader: (1)

And correct me if I'm wrong but I don't think I have a bleeder on the thermo housing... at least I didn't see one

Former User

Compare your bleed procedure with the proper one described in the Honda service manual for the car from which your engine was taken. The Haynes manual is a poor substitute for the Honda service manual. My guess is that there's air still trapped in the cooling system.

Does your engine have a bleeder bolt? If you don't know, look in the Honda service manual.

If your lower radiator hose remains cold when the engine overheats, then coolant is not circulating through the radiator. This could be caused by air trapped in the cooling system, a stuck closed thermostat, or both.

tony_2018

Did the fan kick on when you were bleeding it?

scoker83

iTrader: (1)

No, not while bleeding

Former User

You are in desperate need of the service manual bleed procedure. Check in the Integra Type R forum.

scoker83

iTrader: (1)

I downloaded a factory integra service manual and have re-bled the system again. Still no fan....
Thank you for your suggestions

grumblemarc

iTrader: (4)

How do you KNOW the thermostat is working?

Former User

And describe in detail what you did.

scoker83

iTrader: (1)

I tested it in hot water on the stove. It's opening fully at around 175 degrees

scoker83

iTrader: (1)

Dude, there's no air in the system. I've been bleeding cooling systems on my cars for 15 years. My issue is with the fan....

grumblemarc

iTrader: (4)

He's just making sure. I've read toooooo many times where people have claimed t have done something only not to and the thread rolls on for pages and pages. Take it easy. No one is doubting your ability but there is only so much one can do over the internet.

Former User

Dude, I'm highly skeptical. You're unwilling to provide details, so why even make a thread asking for help? Just move on and stop wasting our time.

scoker83

iTrader: (1)

Oh I know, I've read them too. I really do appreciate everyone's input and I'm all for constructive criticism but it just seemed like we were going around in circles there for a sec.