Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: scrw on September 02, 2011, 10:30:03 PM

Title: I-6 fan clutch & over cooling
Post by: scrw on September 02, 2011, 10:30:03 PM
Do these things fail connected? (ie always driving?)

The WJ has been running cooler recently, and seems to be getting a bit colder recently and a bit of a drop in mpg, wondering if it is not warming up correctly. The temp gauge is sitting at about 80C (well around 10 o'clock on the gauge) it used to be rock solid on the 12 o'clock position. The water pump & 'stat were changed last year with no issues after, temp was the normal 95-100C mark (12 o'clock). And the 'lecy fan relay has been changed, that is running as expected.

Suggestions peeps?
Title: Re: I-6 fan clutch & over cooling
Post by: Nosebolt on September 02, 2011, 10:40:33 PM
thermostat not closing

Title: Re: I-6 fan clutch & over cooling
Post by: scrw on September 02, 2011, 11:09:15 PM
sorry should have added I have changed the stat recently to see if it was that, but now wondering if it was the right temp stat, what temp one should they be?
Title: Re: I-6 fan clutch & over cooling
Post by: Nosebolt on September 02, 2011, 11:13:54 PM
but now wondering if it was the right temp stat, what temp one should they be?

temp was the normal 95-100C mark

 :100:
Title: Re: I-6 fan clutch & over cooling
Post by: scrw on September 02, 2011, 11:16:45 PM
 :icon_biggrin:

Yeah yeah, just depends how accurate the gauge is, plus are they rated at the fully open temp or the temp it starts opening??  I am wondering if I have been given an 82C one and need an 88 or higher?
Title: Re: I-6 fan clutch & over cooling
Post by: Nosebolt on September 02, 2011, 11:23:45 PM
the manual i got say 195°F thats about 90°C
Title: Re: I-6 fan clutch & over cooling
Post by: scrw on September 02, 2011, 11:25:41 PM
I'll grab a new one tomorrow & check the temp. Ta
Title: Re: I-6 fan clutch & over cooling
Post by: Panic mechanic! on September 03, 2011, 12:01:27 AM
while your there make sure the housing hasn't corroded  and allowing  water to bypass the stat, had that on the Yj we have here.
Title: Re: I-6 fan clutch & over cooling
Post by: Mike Pavelin on September 03, 2011, 07:44:47 AM
Do these things fail connected? (ie always driving?)

The WJ has been running cooler recently, and seems to be getting a bit colder recently and a bit of a drop in mpg, wondering if it is not warming up correctly. The temp gauge is sitting at about 80C (well around 10 o'clock on the gauge) it used to be rock solid on the 12 o'clock position. The water pump & 'stat were changed last year with no issues after, temp was the normal 95-100C mark (12 o'clock). And the 'lecy fan relay has been changed, that is running as expected.

Suggestions peeps?

In answer to your original question, yes. When cold you should be able to spin it by hand (with a bit of resistance) but over about 105C it should lock up.
Title: Re: I-6 fan clutch & over cooling
Post by: brian reid on September 10, 2011, 08:48:49 PM
80c is normal temp for most engines,could have been faulty water temp sencor,but if i was running at 90 to 100 i would have worries,

regards