Welcome to the SR20 Community Forum - The Dash.
Register
SR20 forum logo

Thread: VVL coolant boiling over

+ Reply To Thread
Posts: 21-30 of 105
2013-01-31 03:42:49
#21
Theres actually only one fan, drivers side. The car never came with A/C. Thought i remember that the sentras with A/C had two fans.
2013-01-31 05:46:30
#22
Umm I think even ones without a/c as an option came with two fans regardless. Both fans kick on when the temp hits what the ecu is looking for. Either way Id recommend two fans and yeah, might still start with the circuit and if all power checks out and you ground the relay and nothing happens then the fan is probably the culprit.
2013-01-31 16:36:01
#23
I wish SE-R.net was still around, or at least the archive. I remember reading that some of the 91-92 Sentra's without A/C as an option had only 1 fan. But it was something that was uncommon, and I believe I read it 8+ years ago. Ahh could be wrong. anyways, I'll get cracking on this thing. Thanks Ashton
Last edited by Storm88000 on 2013-01-31 at 16-37-16.
2013-01-31 18:32:27
#24
Boiled coolant, been there. Coolant temp sensor died fans didn't turn on if I recall. Still showed on the gauge that my temp was fine when mine did it.

Also, I had A/C with my car. Has two fans. I ripped the entire AC system out. Only 1 fan comes on when I hit temp.
Last edited by SR20VE B13 on 2013-01-31 at 18-33-46.
2013-02-01 14:44:42
#25
happy to hear that this could be a simple fix.... as oppose to a tear down a the motor (fingers still crossed as we dont know if it did get damaged in the process).... keep us updated plz
2013-02-01 16:16:33
#26
Originally Posted by Storm88000
I have figured it out, the coolant fans aren't coming on. At all.

I discovered this after doing 4 dyno runs with the hood open and not one time did they come on during an hour long session while the coolant bottle was boiling over again.

Have no idea why they aren't coming on.


So, you reported an overheating car, changed oil [to inspect for coolant?], did 4 dyno runs ALL BEFORE you checked if your radiator fan [one of the most obvious component of the cooling system] is working/coming on?

I wish you luck with this car...

Peace
2013-02-01 17:28:41
#27
For the dyno runs, you start the motor, hit the gas, then shut it off. Only til we left it running did I notice my fans weren't coming on. And yes its possible to over look something simple when you think its something major.. especially with engines, which have so many variables.
Last edited by Storm88000 on 2013-02-01 at 22-11-14.
2013-02-01 21:27:39
#28
i have both fans in my car wired to run as soon as the key comes on....the relays are screwy and don't always work.....changing out abunch of my cooling system soon......my last motor had a bad headgasket when i got it and it never once mixed coolant and oil that i could tell....always pushed air into the cooling system.....no bueno
2013-02-01 22:23:48
#29
Originally Posted by boomstickracing
i have both fans in my car wired to run as soon as the key comes on....


Do you find that it takes your engine a long time to warm up? If my fans came on at ignition on where I live for half the year my car wouldn't get warm enough for heat. I was paranoid after I boiled coolant and wired mine to a switch, manually turned them on after I reached temp. After I fixed the sensor I wired them back to normal and all is well. I am still paranoid because the wire harness plug for my coolant sensor is busted a bit and struggles to stay on.
2013-02-01 23:03:08
#30
if the lower rad hose is hot... im going with HG also

edit: read more.... pull the relay and use a wire to jump the terminal for the fan(s). if they come on... its either the sensor or the relay
Last edited by unijabnx2000 on 2013-02-01 at 23-06-57.
+ Reply To Thread
  • [Type to search users.]
  • Quick Reply
    Thread Information
    There are currently ? users browsing this thread. (? members & ? guests)
    StubUserName

    Back to top