01 929 overheat issues

bladeracer · 06-28-2009, 1:40 AM

Quote:

Originally Posted by MACI4LIFE

i think for me, i have 96 000km's of crap in the rad fins. but what i'm also going to do is make a bracket that will hold 4 computer fans in a 2x2 pattern and have them to the right of the stock fan. wire them up to a switch and have them running full time during city riding. I'm pretty sure my stock fan is getting close to the end of it's life but replacing it won't solve the very fast temp rises.

Computer fans don't put out much air so I'd expect they'd do more to block airflow than improve it. You'd do better to fit another thermo fan but you'd be much better off fixing the actual problem - although I'm still not convinced you have a problem.

MACI4LIFE · 06-28-2009, 2:38 AM

Quote:

Originally Posted by bladeracer

Computer fans don't put out much air so I'd expect they'd do more to block airflow than improve it. You'd do better to fit another thermo fan but you'd be much better off fixing the actual problem - although I'm still not convinced you have a problem.

i don't really have a problem that probably cannot be solved by pressure washing the rad, but the computer fans pump out approx 40 cfm each. not bad to have running so that stock doesn't have to kick in. I'm in the IT industry so it's easy to get a hold of the fans.

bladeracer · 06-28-2009, 2:54 AM

Quote:

Originally Posted by MACI4LIFE

i don't really have a problem that probably cannot be solved by pressure washing the rad, but the computer fans pump out approx 40 cfm each. not bad to have running so that stock doesn't have to kick in. I'm in the IT industry so it's easy to get a hold of the fans.

There's no reason to avoid the fan from coming on as that's what it's there for. The fan coming on doesn't automatically mean the engine is overheating.

MACI4LIFE · 06-28-2009, 1:05 PM

Quote:

Originally Posted by bladeracer

There's no reason to avoid the fan from coming on as that's what it's there for. The fan coming on doesn't automatically mean the engine is overheating.

i know, but because it's on it's last legs, and those fan assemblies are expensive, i figure i can prolong my fan until next year when i get a new bike. As it is, the fan is on for almost 30 minutes while i go through a stretch of a high traffic area and i want to reduce it's operation. Computer fans are cheaper

texasdirtymax · 06-28-2009, 6:05 PM

does anyone have the diagram on how to wire a switch into the fan wiring? i remember doing one on my 99 trans am, but that was a car

texasdirtymax · 06-29-2009, 7:07 PM

i belive it might be the fan. i found a motor on ebay..it is for a 2000. to you guys' knowledge, will that work?

rjsimon2nd · 06-29-2009, 10:59 PM

my thought is that you forgot to plug a sensor back in, my 954 I had in michigan, it ran for the last 2 years at 220 - 227 in slow traffic and cooled right back down, and now I am in texas and it hasnt changed, I ran that radiator ice also, didnt help, Keep in mind I have had my blade since it had 4000 on it and now it has 28000 on it, You were chasing a ghost, plus you need a thermostat otherwise the coolant travels too fast to be cooled properly in that little radiator. It has to slow down for a few seconds to enjoy the air rushing through the fins, I.E that is why the stat closes.

texasdirtymax · 07-02-2009, 8:57 PM

Quote:

Originally Posted by rjsimon2nd

my thought is that you forgot to plug a sensor back in.

Which sensor? The ground on the left sife of the radiator? Plugged in. Everything else is plugged in and secure. It does run cooler for longer with thermostat gutted, but after sitting for 6 or 7 minutes, it heats up past 227. I did notice the other day that it had come on, but hasnt since. Saw you live in Arlington, ever go to cutie pies for bike night?

GP_RZ · 07-03-2009, 12:50 AM

Test your charging system...these things will overheat if the stator is on its way out especially sitting in traffic.......if your idle comes eratic and your gauges flash on and of thats your stator!

texasdirtymax · 07-03-2009, 11:07 AM

i am familiar with stator. never had anything leading me to believe that stator was bad..lights steady, no shaky idle.

jase · 07-03-2009, 12:34 PM

rjsimon2nd is correct the thermostat is there to regulate the coolant temp by allowing the coolant some dwell time in the rad. Fans should automatically turn on at 214F.

texasdirtymax · 07-06-2009, 8:32 PM

well..who is right? bladeracer says not needed rsimon says it is..now im really confused

jhaggerty73 · 07-06-2009, 9:53 PM

Go get yourself a nice shiny new thermostat. It's a wear item so it's worth replacing. Wether or not this solves you're problem, a good thermostat isn't going to have any negative effect, and if it does, there's a bigger problem somewhere.

You should be able to direct wire your fan just to verify that the fan motor is good. No sense replacing the fan motor if it's spinning up and running normally when running off the battery. If the fan motor is good but won't turn on, either the sensor is bad or it's not receiving the signal to activate the fan or the ECU is ignoring that signal. If the fan motor works but won't come on, somewhere there is a breakdown in communication.

Test, test, test. No sense just throwing money and parts at the problem, unless they're normal wear items that could stand to be replaced anyway.

Otherwise, if you're not hitting the red zone in your temp, I wouldn't worry about it.

bladeracer · 07-06-2009, 11:42 PM

Quote:

Originally Posted by texasdirtymax

well..who is right? bladeracer says not needed rsimon says it is..now im really confused

You removed the thermostat already didn't you?
Did it make a difference?

rforsland · 07-07-2009, 12:32 AM

Quote:

Originally Posted by jase

rjsimon2nd is correct the thermostat is there to regulate the coolant temp by allowing the coolant some dwell time in the rad. Fans should automatically turn on at 214F.

The "dwell time" theory is a myth. The purpose of a thermostat is to allow the engine to come up to operating temperature as quickly as possible..for efficiency, performance, and emissions purposes. Once the engine reaches operating temperature, the thermostat is "always open" i.e. same as if it was not even there. If the "dwell time" theory were true, then the open thermostat of warmed up engines would not allow for the proper dwell time for the coolant to cool and ALL engines would overheat.

The thermostat only plays a role in the first 10 minutes or so of the engine being operated..after that, it might as well not be there. Look it up...

bladeracer · 07-07-2009, 12:46 AM

Quote:

Originally Posted by rforsland

The "dwell time" theory is a myth. The purpose of a thermostat is to allow the engine to come up to operating temperature as quickly as possible..for efficiency, performance, and emissions purposes. Once the engine reaches operating temperature, the thermostat is "always open" i.e. same as if it was not even there. If the "dwell time" theory were true, then the open thermostat of warmed up engines would not allow for the proper dwell time for the coolant to cool and ALL engines would overheat.

The thermostat only plays a role in the first 10 minutes or so of the engine being operated..after that, it might as well not be there. Look it up...

The thermostat even when open still offers significant obstruction but I agree that I doubt it's significant enough to cause problems.

ghbzorro · 07-07-2009, 2:55 AM

Quote:

Originally Posted by rforsland

The "dwell time" theory is a myth.

Agreed.

rjsimon2nd · 07-07-2009, 3:34 AM

Quote:

Originally Posted by rforsland

The "dwell time" theory is a myth. The purpose of a thermostat is to allow the engine to come up to operating temperature as quickly as possible..for efficiency, performance, and emissions purposes. Once the engine reaches operating temperature, the thermostat is "always open" i.e. same as if it was not even there. If the "dwell time" theory were true, then the open thermostat of warmed up engines would not allow for the proper dwell time for the coolant to cool and ALL engines would overheat.

The thermostat only plays a role in the first 10 minutes or so of the engine being operated..after that, it might as well not be there. Look it up...

Right the stat does make heat up quicken, but take the hose off any coolant system, hook something up and watch the coolant flow, it closes, to regulate the flow also. I dont speak off the top of my head, I speak of experience, an overheated engine has a thermostat that is opened constantly.

rjsimon2nd · 07-07-2009, 3:40 AM

Quote:

Originally Posted by texasdirtymax

Which sensor? The ground on the left sife of the radiator? Plugged in. Everything else is plugged in and secure. It does run cooler for longer with thermostat gutted, but after sitting for 6 or 7 minutes, it heats up past 227. I did notice the other day that it had come on, but hasnt since. Saw you live in Arlington, ever go to cutie pies for bike night?

never been to cutiepies, been here since october, but work too much, like 70+ hours a week. I am that guy that wheelies down 360 at 3 am to get it out of the system. when is bike night anyways? I would love to meet some people to ride with

jase · 07-07-2009, 8:11 PM

It's no myth. The thermostat allows the engine to come to operating temperature, and maintains the engine at the optimal temperature for combustion. The thermostat also acts as a metering orifice in the cooling system slowing the rate of flow allowing the heat in the coolant time to transfer to the air moving through the radiator.

Sugabear · 07-13-2009, 11:48 PM

I have a '01 929 and I live in Houston and my fan kicks on but for some reason I leak coolant. I come to Dallas and Arlington alot for work. I see biker ride wheelies down I-20, 360 and 635.

bladeracer · 07-14-2009, 12:43 AM

Quote:

Originally Posted by Sugabear

I have a '01 929 and I live in Houston and my fan kicks on but for some reason I leak coolant. I come to Dallas and Arlington alot for work. I see biker ride wheelies down I-20, 360 and 635.

Where is your coolant leaking from?

Sugabear · 07-14-2009, 12:50 AM

somewhere from the bottom......it gets on the fairing and then its gone....... I fill it pretty often because I dont want it to run hot........

texasdirtymax · 08-07-2009, 7:20 PM

im confused because the fan came on at one time. I replaced fan switch and fan, since I got a good deal on one (15 bucks). Checked connection to ECT sensor, seemed to be plugged in, used some terminal gel to ensure. Still overheats when in traffic and moving slow. Hit the highway and I saw temps around 190F with outside air at 100F. Stopped for a quick signal and temp rose to 233f before i got going again. Back to 45mph and temp down. WHAT IS GOING ON?

bladeracer · 08-07-2009, 7:27 PM

Quote:

Originally Posted by texasdirtymax

im confused because the fan came on at one time. I replaced fan switch and fan, since I got a good deal on one (15 bucks). Checked connection to ECT sensor, seemed to be plugged in, used some terminal gel to ensure. Still overheats when in traffic and moving slow. Hit the highway and I saw temps around 190F with outside air at 100F. Stopped for a quick signal and temp rose to 233f before i got going again. Back to 45mph and temp down. WHAT IS GOING ON?

The fan is supposed to come on - it does not mean the engine is overheating.
190F is not overheating, that's normal operating temp.
233F is too hot though. was the fan running?

929hit · 08-07-2009, 8:02 PM

hahaha
Bladeracer is a saint, I'm irritated just from reading this thread.

texasdirtymax, the fan is easy to hear. The temp rises up to between 215 and 220, and you hear the fan spin up... I don't think we've established in this thread whether the fan is working or not... If you're deaf, you can still feel the hot air on your left calf through pants when it turns on.

texasdirtymax · 08-23-2009, 9:57 PM

first of all, i am not deaf. I know what teh fan sounds like and feels like when it comes on. The only timet this summer that the fan came on, caused me to flush radiator and motor of coolant and start over. That didnt work. Bike still got hot. I gutted the t-stat and still over heats. I dont really feel as if teh bike is getting rediculously hot, but it is also 104 outside here sometimes. I recently wrapped the headers and idled the bike for 7 minutes and only saw temps of 165, before I had to shut it down and head to church. I feel like it might be the ECT sensor not reporting actual temp, since it doesnt feel like im riding a flamethrower. It just gets a little scary when you are miles away from home and you investment could be possibly melting before your eyes. Also, the bike does not appear to be using coolant. Thanking about running about 3 gallons worth of water thru system at idle, just to make sure bike is super flushed. I feel like it might also be an electrial issue with fan wiring. That is going to have to take place next weekend, since im Heading to Langley this week for work. Thanks for the help, and 929hit, stop acting like a Gypsy.

bladeracer · 08-24-2009, 2:42 AM

Quote:

Originally Posted by texasdirtymax

The only timet this summer that the fan came on, caused me to flush radiator and motor of coolant and start over.

Why?
The fan is _supposed_ to come on. It does not mean the engine is overheating.
Does the fan come on in your car?

texasdirtymax · 08-24-2009, 7:47 PM

i'm sorry. I guess im no explaining properly. I was stating the fan was not coming on up to 233 degrees, before I would shut it down for fear of meltdown. I know that in my M3, when i am sitting in traffic for a preiod of time, that the fans come on, at least until i get moving again. I dont really know if the temp is true or not, since ambient air outside already 100 or so, making it hard to tell if heat is from motor.

So are you saying that the fan might be operating properly, but my ECT is not bing properly displayed (ie for example bike showing temp of 233, but engine really at 205 degrees??) like a mis calibrated switch or sensor?

JORDAN N · 08-24-2009, 11:09 PM

Ambient air does not change the accuracy of your temp gauge. Your fan should come on around 215-220F. This is normal. If the fan does not come on check the switch in the rad that turns the fan on. Take the wire off the radiator and ground it. With the key in ON the fan should come on with that wire grounded. If not check the power. If power is present the suspect is the switch in the radiator.