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6/30/12 7:51pm - Original Message: 'Water temp around 210 cruzing '
ace Lifetime Member
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Ocala, FL - USA

Vette(s):
1975 coupe, Green, 4speed, T-top, 383 stroked, Hooker side pipes.

Joined: 9/14/2002
Posts: 71
 
 
 
I just put a Jegs #555-52105 @ 1950 CFM electric fan N shroud along with a ProForm electric water pump. I have an aluminum radiator also. I'm also running a wire relay N sender unit it's on at 200 off @ 185 for a 195 thermostat. When I'm cruzing it goes to 210 on my Auto meter gauge. Is that HI or am I looking for problems ? I think I put the 185 thermostat in place of 195, does it really matter or should I put the 195 back in ? I am going crazy I think !
 
When I had the stock fan N water pump it always ran 190 + -. Do I need to put a duel fan or possibly a bigger radiator in or am I ok ?

Nothing like Cruzn @ 75 with the tops off
 
ACE


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6/30/12 9:29pm - Reply: 'Re: Water temp around 210 cruzing '
rod7515 Lifetime Member
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Red Lion, PA - USA

Vette(s):
1974 White 350 Corvette, TH400 Automatic 1972 Tangerine /Go Mango Convertible 383 Stroker, 2004r Automatic

Joined: 10/27/2006
Posts: 1172
I just did the temp check on mine. When it sits and idles my gauge goes up to 210 once warm. The fan doesnt come on until the gauge gets to 205 - 210. It goes off around 195. Mine are dual spal from dewitts. My sending unit is suppose to turn the fans on at 190 - 195 and off at 180 - 185. After the fans cycled on and off a few times I took my temp sensor gun and found that when the gauge reads 210 the sending switches and thermostat housing is at 195. When the fans complete the cycle the switches and housing are down to 185. Now thats on mine so I know the gauge isnt 100% accurate. I realize you said before the change yours temps never ran that high so I would suggest you check it and see what you really have. Again mine is a dual set and your are using a single fan, But i also know others running a single fan and they are happy with their setup.
Best of luck
Rodney



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7/1/12 9:59am - Reply: 'Re: Water temp around 210 cruzing '
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19457
ace said:I just put a Jegs #555-52105 @ 1950 CFM electric fan N shroud along with a ProForm electric water pump.


This may be your issue. Unless that pump has a variable speed, it may not be capable of keeping the coolant flow volume up at road/cruize speed. Does the engine cool down once you slow down from hiway speeds, or does it stay hot, or continue to get hotter?

Electric pumps are prolly ok on cars with front ends/grills that allow air onto the radiator. Shark cars ain't all that great in that area...not a lot of airflow thru the rad., so they naturally tend to wanna run hotter than most other vehicles. Anything that hampers coolant or air flow will cause them to run hotter.

I would first want to verify that the temp on the gauge is correct by doing the same thing Rodney did...check it with an infrared temp gun, and compare actual temp to gauge temp, and go from there.


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7/1/12 6:18pm - Reply: 'Re: Water temp around 210 cruzing '
ace Lifetime Member
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Ocala, FL - USA

Vette(s):
1975 coupe, Green, 4speed, T-top, 383 stroked, Hooker side pipes.

Joined: 9/14/2002
Posts: 71
Thanks guys for the info, I will check it out this week when I get some free time after work. Going to get a temp gun and see what that shows. Thumbs Up
Thanks again, ACE

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7/4/12 7:10pm - Reply: 'Re: Water temp around 210 cruzing '
ace Lifetime Member
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Ocala, FL - USA

Vette(s):
1975 coupe, Green, 4speed, T-top, 383 stroked, Hooker side pipes.

Joined: 9/14/2002
Posts: 71
I went and bought a mini IR thermometer with laser pointer. The fan kicks on around 200 deg + - , I think it needs to come on sooner like 180 +-. I also added a bottle of water wetter should it not help lower temp or is that just bunk ? Would it be better to replace sensor with one that turns on sooner like 185 ish ? I have a 16" Jeggs universal S blade 1950 cfm fan do I need to run a dual fan set up or will this be ok when I get it to turn on sooner. I'm at my witts end if there is such a thing Confused Can I also add a toggle switch to turn on fan sooner or is that not a good idea ? Well I'm done rambling for now hope this wont make me any grayer Censored      Any and all help is appreciated, thanks gang for UR help !
 
 
Have fun cruzn !
 
ACE 


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7/5/12 7:05am - Reply: 'Re: Water temp around 210 cruzing '
rod7515 Lifetime Member
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Red Lion, PA - USA

Vette(s):
1974 White 350 Corvette, TH400 Automatic 1972 Tangerine /Go Mango Convertible 383 Stroker, 2004r Automatic

Joined: 10/27/2006
Posts: 1172
sensors to come on at different temps are available. i think a good place to check is dewitts. as for adding a switch to turn it on or off you can add a ground to your sensor that is controlled by a toggle switch. all your sensor does is create a ground. many people do that in case the switch were to manfunction. good luck rodney

|UPDATED|7/5/2012 5:05:52 AM (AZT)|/UPDATED|


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7/5/12 11:54am - Reply: 'Re: Water temp around 210 cruzing '
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19457
What kind of shroud, and is it sealed against the radiator? If the fan isn't shrouded completely, you could have air passing around it, instead of being drawn thru the fan. The electric fan really shouldn't be an issue at cruizing speeds...there should be enough airflow over the rad to keep the engine cool at road speeds...unless there is something restricting the airflow(trash on front of condenser/radiator, air dam(spoiler) missing/damaged, or seals around the rad missing/damaged.

Turning the fan on sooner will not keep it from getting hot....it will just take it a little longer to get there.


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Joel Adams
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7/9/12 8:23am - Reply: 'Re: Water temp around 210 cruzing '
ace Lifetime Member
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Ocala, FL - USA

Vette(s):
1975 coupe, Green, 4speed, T-top, 383 stroked, Hooker side pipes.

Joined: 9/14/2002
Posts: 71
Here is a pic of my set up.

http://www.c3vr.com/member_uploads/1601_1700/1663/FD61B_P9290189.JPG


(large image changed to link)


|UPDATED|7/9/2012 6:23:48 AM (AZT)|/UPDATED|


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7/9/12 8:33am - Reply: 'Re: Water temp around 210 cruzing '
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19457
Wow....I see at least part of the problem... You have no lower shroud...all of the air that should be going thru the radiator is going right under/behind it. You really need to find the rest of the shroud, or find something to close up that huge open area below the radiator...you should NOT be able to see the ground from the top...
Do you have the lower part of the shroud?

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Joel Adams
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7/9/12 9:15am - Reply: 'Re: Water temp around 210 cruzing '
rraider1
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Woodland, WA - USA

Vette(s):
1977 T-Top,350,Auto Black Ruby Pearl,Steeroids R&P conversion

Joined: 10/14/2003
Posts: 1152

I think Joel is onto it, you need the lower scoop also. But just a silly question which way is that fan blowing it should be sucking the air through the radiator not blowing towards the front.



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7/9/12 9:28am - Reply: 'Re: Water temp around 210 cruzing '
rraider1
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Woodland, WA - USA

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7/9/12 4:28pm - Reply: 'Re: Water temp around 210 cruzing '
VikingVette
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Greer, SC - USA

Vette(s):
1978 Black with Viking mural painted under hood AM/FM/CB radio, T-top and a 2013 Cyber Gray Grand Sport Coupe, 2LT for my daily driver

Joined: 3/13/2012
Posts: 264
To my knowledge (which is small compared to many on here) there are two types of fans.....a pusher which would be mounted in front of the radiator, and a puller which is mounted behind the radiator to pull air through...but yes, the hole that is big enough to drive a semi through is a big issue.  It is also a HUGE issue on the older gas engine motorhome.  Need to seal it up to make sure ALL the air that is possible goes THROUGH the radiator.
 
Dr. Adams may (and probably will correct me)Geek


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Warning: The surgeon general has declared that it is NOT unhealthy to smoke your competition AND I just discovered that my corvette is a hybred.  It burns gas and rubber! 
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7/9/12 9:29pm - Reply: 'Re: Water temp around 210 cruzing '
ace Lifetime Member
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Ocala, FL - USA

Vette(s):
1975 coupe, Green, 4speed, T-top, 383 stroked, Hooker side pipes.

Joined: 9/14/2002
Posts: 71
The fan is a puller, I will work on fixing bottom part of shroud. I think I cut it off, OH OH ! I will fabricate something if need B. 
 
Thanks everyone.
 
ACE


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7/9/12 9:31pm - Reply: 'Re: Water temp around 210 cruzing '
ace Lifetime Member
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Ocala, FL - USA

Vette(s):
1975 coupe, Green, 4speed, T-top, 383 stroked, Hooker side pipes.

Joined: 9/14/2002
Posts: 71
The lower scoop is in place. I guess I need to figure out what to do with bottom of shroud, mine was always cracked so I cut it off.
 
Thanks, ACE
 


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7/10/12 2:48pm - Reply: 'Re: Water temp around 210 cruzing '
VikingVette
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Greer, SC - USA

Vette(s):
1978 Black with Viking mural painted under hood AM/FM/CB radio, T-top and a 2013 Cyber Gray Grand Sport Coupe, 2LT for my daily driver

Joined: 3/13/2012
Posts: 264
That lip on the bottom is there to help direct the air UP and into the radiator area. I do not know hohw much a lower valanve costs, but I don't think that they are very much.  Ifyou can, you might look into an entier new lower valance.  just my humble. and probably useless opinion.
David


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Warning: The surgeon general has declared that it is NOT unhealthy to smoke your competition AND I just discovered that my corvette is a hybred.  It burns gas and rubber! 
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7/10/12 2:57pm - Reply: 'Re: Water temp around 210 cruzing '
ace Lifetime Member
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Ocala, FL - USA

Vette(s):
1975 coupe, Green, 4speed, T-top, 383 stroked, Hooker side pipes.

Joined: 9/14/2002
Posts: 71
V King,
 
The only thing I am missing from car is rest of shroud, which I ordered today :) Everything else is there so I should B good to go, I hope ! Will let U know how things work out once I get the new shroud in place Wed or thur !
 
Thanks, ACE


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7/11/12 9:31pm - Reply: 'Re: Water temp around 210 cruzing '
ace Lifetime Member
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Ocala, FL - USA

Vette(s):
1975 coupe, Green, 4speed, T-top, 383 stroked, Hooker side pipes.

Joined: 9/14/2002
Posts: 71
U guys R awsome ClapThumbs Up  I just replaced my fan shroud, installed a 185 sending unit. It worked temp went just a tad over 195 while ideling in garage ! Now it's time to Cruz and enjoy rest of summer.   Cool
 
Thanks, ACE


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7/11/12 9:56pm - Reply: 'Re: Water temp around 210 cruzing '
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19457
Clap Thumbs Up Clap Thumbs Up Clap Thumbs Up

Horaaaaay!!!!Clap Thumbs Up 

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Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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7/12/12 6:56pm - Reply: 'Re: Water temp around 210 cruzing '
ace Lifetime Member
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Ocala, FL - USA

Vette(s):
1975 coupe, Green, 4speed, T-top, 383 stroked, Hooker side pipes.

Joined: 9/14/2002
Posts: 71
Yep, U guys R the best ! Whenever I have a question there is never a shortage of help given. Thanks again and enjoy the summer CRUZN75 Beer  Thumbs Up
 
ACE


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7/17/12 3:44pm - Reply: 'Re: Water temp around 210 cruzing '
ace Lifetime Member
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Ocala, FL - USA

Vette(s):
1975 coupe, Green, 4speed, T-top, 383 stroked, Hooker side pipes.

Joined: 9/14/2002
Posts: 71
Ok here we go again Confused cruzn today and it went to 210 again. I even have the fan shroud and seals installed. I think I'm going to put the aluminum water pump back on N try that. It has been in the upper 90's here the last few days but that should not natter much I hope. My ride today was about an hr total there N back so I am at a loss for sure. Thought I had it fixed, could the electric water pump be the main issue ?  Thanks again guys, I'm becoming a regular here LOL
 
ACE 


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