 | BADASS of New England
An automobile club for the enthusiast who enjoys the last of the big GM cars. The rear wheel drive B and D bodys. Chevrolet Impala SS, Caprice, 9C1, Buick Roadmaster, Oldsmobile Custom Cruiser, Cadillac Fleetwood
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| | | another cooling system question |  |
| | | Author | Message |
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soshoresig
Posts : 34
Join date : 2010-09-13
| | Subject: another cooling system question Sun Feb 26, 2012 2:06 pm | |
| So as I mentioned in my other post, the mechanical fan belt tensioner seized on the wifes RMW, which has reminded me that 6 months ago her secodary electric fan was running constantly and would not shut off at all. I pulled the relay from the under hood box and kind of forget about it. I think I was messing with the a/c when the fan started stayin on. Any ideas what I may have done?? thanks | |
| | | | SPCS
Posts : 122
Join date : 2012-02-17
Age : 46
Location : Stuttgart, Germany
| | Subject: Re: another cooling system question Sun Feb 26, 2012 2:23 pm | |
| Not turned off the A/C maybe?  A/C "On" is supposed to set off the cooling fans constantly, up to a certain speed, anyway. | |
| | | | Guest
Guest
| | Subject: Re: another cooling system question Sun Feb 26, 2012 3:33 pm | |
| - SPCS wrote:
- Not turned off the A/C maybe?
A/C "On" is supposed to set off the cooling fans constantly, up to a certain speed, anyway. You are correct. I think after 45mph it shuts off. I would say the relay might be bad. I have never seen an LT1 overheat, and I never use A/C. The only way I have ever seen the secondary fan come on is when I force it too by unplugging the coolant temp sensor at the water pump. |
| | | | sdstick
Posts : 4292
Join date : 2009-03-20
Location : Revere, MA
| | Subject: Re: another cooling system question Sun Feb 26, 2012 4:14 pm | |
| I pulled the mechanical fan right off the RMW.
No problems.
I didnt pull the bracket yet as I didnt have the shorter bolts available.
The secondary will cycle when sitting @ idle for extended periods of time.
Dont know if thats all or just mine. _________________ Steve 96BBB 28K 3.42 Bolt-ons 95BBB 100K 3.73 383 New DD...already broke fixt the 4L60E twice 95 Black WB4 Hole...ee...grail 96 Black WB4 No holes in this 95BBB 189K 3.08 Old DD Stolen...by Matt.  Whine..eee...Silver LS6 | |
| | | | 95brmw
Posts : 1434
Join date : 2009-11-10
Age : 39
Location : Connecticut
| | Subject: Re: another cooling system question Sun Feb 26, 2012 5:41 pm | |
| Any CELs? certain ones will cause the fans to run constantly. | |
| | | | soshoresig
Posts : 34
Join date : 2010-09-13
| | Subject: Re: another cooling system question Sun Feb 26, 2012 9:16 pm | |
| A/C is off ( it is February in New England after all) besides it doesnt work. I was playing with the freon, would an overpressure cond cause the fan to run constantly? | |
| | | | SPCS
Posts : 122
Join date : 2012-02-17
Age : 46
Location : Stuttgart, Germany
| | Subject: Re: another cooling system question Mon Feb 27, 2012 5:51 am | |
| Yes. I'm not sure about the one mechanical / one eletrical setup, but the dual electrical fans will come on at 189 psi for the primary and 240 psi A/C head pressure for the secondary fan, and stay on until pressure has dropped below 150 adn 210 psi respectively. | |
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