GMCforum: GMCnet » [GMCnet] Fan Clutch

Home » Public Forums » GMCnet » [GMCnet] Fan Clutch

Show: Today's Messages :: Polls :: Message Navigator

Re: [GMCnet] Fan Clutch [message #61560 is a reply to message #61099]

Sun, 25 October 2009 11:30

rgleas

Messages: 48
Registered: May 2009
Location: Tulsa, Ok.

Karma:

Member

Having read the message link I think Tin Gerbil provided a very good description as to the differences in the fan clutches. The only thing I might add to his input is that the 65% vs. the 95% stands for the decoupling when the temperature of the thermostat in the clutch is below the engagement temperature. This explains why the standard clutch is less noisy when it is satisfied. On the other hand, the 95% clutch only slows down 5% between being satisfied and to hot. Most probably would not be able to notice a difference in the noise level.

This also explains why GM chose the 65% clutch since gas mileage was a major issue at the time. This is a rather large fan and the larger the fan the more horsepower it takes to move the fan. All that translates to is lower gas mileage. As long as the radiator system is rejecting the heat of the engine it is doing its job any additional heat rejection simply closes the engine thermostat retaining the water in the engine longer.

Now for a question, several have lowered their engine thermostats from the recommended 195 degree to 185 degrees, what is the purpose of this? The newer gasoline’s are formulate where it takes higher temperatures to burn them completely some of the newer engines are using as high as 210 degree thermostats to accomplish a complete burn. Engines I have seen torn down with too low of thermostat leave unburned deposits in the heads leading to catastrophic failures.

Report message to a moderator

[Message index]

		[GMCnet] Fan Clutch By: USAussie on Wed, 21 October 2009 22:36
		Re: [GMCnet] Fan Clutch By: Ken Burton on Wed, 21 October 2009 22:43
		Re: [GMCnet] Fan Clutch By: Rick Denney on Thu, 22 October 2009 00:33
		Re: [GMCnet] Fan Clutch By: Tin Gerbil on Thu, 22 October 2009 00:49
		Re: [GMCnet] Fan Clutch By: USAussie on Thu, 22 October 2009 02:57
		Re: [GMCnet] Fan Clutch By: Oldngray on Thu, 22 October 2009 07:22
		Re: [GMCnet] Fan Clutch By: Tin Gerbil on Thu, 22 October 2009 10:54
		Re: [GMCnet] Fan Clutch By: USAussie on Thu, 22 October 2009 15:37
		Re: [GMCnet] Fan Clutch By: Ray Erspamer on Thu, 22 October 2009 10:32
		Re: [GMCnet] Fan Clutch By: Tin Gerbil on Fri, 23 October 2009 00:44
		Re: [GMCnet] Fan Clutch By: Ken Burton on Fri, 23 October 2009 01:43
		Re: [GMCnet] Fan Clutch By: Tin Gerbil on Fri, 23 October 2009 09:28
		Re: [GMCnet] Fan Clutch By: Rick Denney on Fri, 23 October 2009 14:50
		Re: [GMCnet] Fan Clutch By: USAussie on Fri, 23 October 2009 18:31
		Re: [GMCnet] Fan Clutch By: Rick Denney on Sat, 24 October 2009 01:35
		Re: [GMCnet] Fan Clutch By: USAussie on Sat, 24 October 2009 02:47
		Re: [GMCnet] Fan Clutch By: emerystora on Sat, 24 October 2009 09:37
		Re: [GMCnet] Fan Clutch By: Ken Burton on Fri, 23 October 2009 21:18
		Re: [GMCnet] Fan Clutch By: WD0AFQ on Fri, 23 October 2009 22:56
		Re: [GMCnet] Fan Clutch By: Rick Denney on Sat, 24 October 2009 02:44
		Re: [GMCnet] Fan Clutch By: Rick Denney on Sat, 24 October 2009 02:38
		Re: [GMCnet] Fan Clutch By: GMCWiperMan on Sat, 24 October 2009 07:00
		Re: [GMCnet] Fan Clutch By: Ken Burton on Sat, 24 October 2009 09:09
		Re: [GMCnet] Fan Clutch By: USAussie on Thu, 22 October 2009 02:55
		Re: [GMCnet] Fan Clutch By: Rick Denney on Thu, 22 October 2009 04:05
		Re: [GMCnet] Fan Clutch By: rgleas on Sun, 25 October 2009 11:30
		Re: [GMCnet] Fan Clutch By: emerystora on Sun, 25 October 2009 11:52
		Re: [GMCnet] Fan Clutch By: Gary Casey on Sun, 25 October 2009 12:32
		Re: [GMCnet] Fan Clutch By: Tin Gerbil on Sun, 25 October 2009 13:05
		Re: [GMCnet] Fan Clutch By: emerystora on Sun, 25 October 2009 13:29
		Re: [GMCnet] Fan Clutch By: Tin Gerbil on Sun, 25 October 2009 17:38
		Re: [GMCnet] Fan Clutch By: emerystora on Sun, 25 October 2009 18:02
		Re: [GMCnet] Fan Clutch By: Tin Gerbil on Sun, 25 October 2009 18:51
		Re: [GMCnet] Fan Clutch By: RF_Burns on Thu, 22 October 2009 07:54
		Re: [GMCnet] Fan Clutch By: Ray Erspamer on Thu, 22 October 2009 10:40
		Re: [GMCnet] Fan Clutch By: GMCWiperMan on Thu, 22 October 2009 15:09
		Re: [GMCnet] Fan Clutch By: Gary Casey on Thu, 22 October 2009 17:17
		Re: [GMCnet] Fan Clutch By: Ray Erspamer on Thu, 22 October 2009 17:21
		Re: [GMCnet] Fan Clutch By: Tin Gerbil on Thu, 22 October 2009 10:23
		Re: [GMCnet] Fan Clutch By: Rick Williams on Fri, 23 October 2009 09:05
		Re: [GMCnet] Fan Clutch By: Tin Gerbil on Fri, 23 October 2009 09:43
		Re: [GMCnet] Fan Clutch By: amansfield1104 on Fri, 23 October 2009 10:16
		Re: [GMCnet] Fan Clutch By: roy1 on Sat, 24 October 2009 21:16
		Re: [GMCnet] Fan Clutch By: Ken Burton on Sat, 24 October 2009 21:19
		Re: [GMCnet] Fan Clutch By: roy1 on Sat, 24 October 2009 21:38
		Re: [GMCnet] Fan Clutch By: Larry on Fri, 23 October 2009 12:36
		Re: [GMCnet] Fan Clutch By: Ray Erspamer on Fri, 23 October 2009 13:12
		Re: [GMCnet] Fan Clutch By: Tin Gerbil on Fri, 23 October 2009 13:16
		Re: [GMCnet] Fan Clutch By: Ray Erspamer on Fri, 23 October 2009 13:43
		Re: [GMCnet] Fan Clutch By: Ken Burton on Sat, 24 October 2009 09:45
		Re: [GMCnet] Fan Clutch By: Tin Gerbil on Sat, 24 October 2009 11:24
		[GMCnet] Horsepower and Torque Converter Efficiency By: Gary Casey on Sun, 25 October 2009 04:55
		Re: [GMCnet] Horsepower and Torque Converter Efficiency By: GMCWiperMan on Sun, 25 October 2009 06:29
		Re: [GMCnet] Horsepower and Torque Converter Efficiency By: Gary Casey on Sun, 25 October 2009 09:13
		[GMCnet] "six-speed" transmission By: Gary Casey on Sun, 25 October 2009 10:31
		Re: [GMCnet] "six-speed" transmission By: emerystora on Sun, 25 October 2009 10:54
		Re: [GMCnet] "six-speed" transmission By: Gary Casey on Sun, 25 October 2009 12:02
		Re: [GMCnet] "six-speed" transmission By: emerystora on Sun, 25 October 2009 13:39
		Re: [GMCnet] "six-speed" transmission By: Gary Casey on Mon, 26 October 2009 07:07
		Re: [GMCnet] "six-speed" transmission By: Gary Casey on Sun, 25 October 2009 12:04
		Re: [GMCnet] "six-speed" transmission By: comcast on Sun, 25 October 2009 12:21
		Re: [GMCnet] "six-speed" transmission By: emerystora on Sun, 25 October 2009 14:01
		Re: [GMCnet] Horsepower and Torque Converter Efficiency By: Tin Gerbil on Sun, 25 October 2009 10:59

Previous Topic:	[GMCnet] 49er Port Costa -- WIFI--
Next Topic:	[GMCnet] 1973 GMC 4 Sale in SF Bay area Craigslist

Goto Forum:

-=] Back to Top [=-

Current Time: Sun May 19 19:31:06 CDT 2024

Total time taken to generate the page: 0.01158 seconds