Fans not kicking in 'til 237* on a 218* switch - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 04-27-2008, 01:20 PM
Bryan59EC's Avatar
Car? Truck? Who Cares
 

Last journal entry: First week of December
Last photo:
Join Date: Jun 2006
Location: San Antonio, Texas
Age: 54
Posts: 2,363
Wiki Edits: 0

Thanks: 1
Thanked 19 Times in 17 Posts
Fans not kicking in 'til 237* on a 218* switch

I'm kinda wondering if anyone here would know where to get a
bushing for a 3/8 switch to a 1/2 intake??

The bushing I am using now shrouds the sensor bulb to the extent that only the bottom of the sensor is exposed to flowing coolant.

Do you suppose this is why the fans do not come on when theya re supposed to?? The first time they are activated by the fan switch, is around 237.
Then the engine will get down to 215 and the fans will shut off. Subsequent cycles will kick the fans on around 228 and off around 210.

This is on a NAPA FS118-----on @218--off@205 switch

Kinda wondering where I could get a bushing that does not have the hex on it. Dakota Digital has bushings for 1/2 to 1/8 and 1/2 to a 1/4 that are only about 3/8" tall. Whear this bushing from Spal (and any others I have been able to find) are close to an inch or better.

Any insight to this?? Is it the bushing shrouding the bulb causing the fans not to come on when they are supposed to??

I have tried 3 different switches (fs118 2x --and a chevy switch once) and get the same results with all of the switches.

This is on the 59 Elky, and temps have been verified by the Dakota Digital gages AND and infared temp meter. (gage and meter match at all temps)

Bryan
Attached Thumbnails
Click image for larger version

Name:	HPIM2567.JPG
Views:	41
Size:	101.1 KB
ID:	29532   Click image for larger version

Name:	HPIM2568.JPG
Views:	44
Size:	101.5 KB
ID:	29533  

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 04-27-2008, 02:05 PM
curtis73's Avatar
Hates: Liver. Loves: Diesel
 
Last wiki edit: How to find cheap parts
Last journal entry: 1999-2001: Getting it on the road
Last photo:
Join Date: Dec 2005
Location: Carlisle, PA
Age: 40
Posts: 5,146
Wiki Edits: 16

Thanks: 0
Thanked 3 Times in 3 Posts
Depending on sensor locations, coolant temps can vary up to 30 degrees throughout different places. Often times there is a 10-15 degree difference between the manifold and the heads.

I wouldn't worry about the shrouding of the sensor. Water is an excellent conductor of heat, plus there is plenty of turbulence around that fitting. Plus, the fitting is probably brass and its almost as good as the water at conducting heat.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 04-27-2008, 02:14 PM
Bryan59EC's Avatar
Car? Truck? Who Cares
 

Last journal entry: First week of December
Last photo:
Join Date: Jun 2006
Location: San Antonio, Texas
Age: 54
Posts: 2,363
Wiki Edits: 0

Thanks: 1
Thanked 19 Times in 17 Posts
The fan switch is located in the intake----directly opposite of the temp gage sender.

If the fan switch is working correctly----then the 1,3,5,7 side is running much hotter (15-20*) than the 2,4,6,8 side.

Guess I could swap the sensors around and check for that.
Not gonna do it today tho

not too worried about an overheat at all, runs around 200-205 on the hiway, and that is acceptable to me----(probably could use a bit more timing tho)
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 04-27-2008, 03:26 PM
carsavvycook's Avatar
My 2 cents worth
 
Last photo:
Join Date: Sep 2007
Location: Lakeside, CA
Age: 57
Posts: 2,855
Wiki Edits: 3

Thanks: 2
Thanked 2 Times in 2 Posts
Put it in the cylinder head, either side you can. The thread size should be the same as your sender. You will find it will work as advertised temp wise.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 04-27-2008, 03:55 PM
Bryan59EC's Avatar
Car? Truck? Who Cares
 

Last journal entry: First week of December
Last photo:
Join Date: Jun 2006
Location: San Antonio, Texas
Age: 54
Posts: 2,363
Wiki Edits: 0

Thanks: 1
Thanked 19 Times in 17 Posts
Nope----
3/8" pipe sender
1/2" pipe intake, heads
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 04-27-2008, 04:00 PM
carsavvycook's Avatar
My 2 cents worth
 
Last photo:
Join Date: Sep 2007
Location: Lakeside, CA
Age: 57
Posts: 2,855
Wiki Edits: 3

Thanks: 2
Thanked 2 Times in 2 Posts
What heads do you have on it?
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 04-27-2008, 04:03 PM
carsavvycook's Avatar
My 2 cents worth
 
Last photo:
Join Date: Sep 2007
Location: Lakeside, CA
Age: 57
Posts: 2,855
Wiki Edits: 3

Thanks: 2
Thanked 2 Times in 2 Posts
We are assuming it is a SBC any different?
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 04-27-2008, 04:35 PM
carsavvycook's Avatar
My 2 cents worth
 
Last photo:
Join Date: Sep 2007
Location: Lakeside, CA
Age: 57
Posts: 2,855
Wiki Edits: 3

Thanks: 2
Thanked 2 Times in 2 Posts
The fitting you are looking for you can find at a hardware store. It is called a Close Pipe Adapter. It will have no hex and the shortest one will be in cast iron metal. Install it in the cylinder head so it reads right.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 04-28-2008, 05:46 AM
Bryan59EC's Avatar
Car? Truck? Who Cares
 

Last journal entry: First week of December
Last photo:
Join Date: Jun 2006
Location: San Antonio, Texas
Age: 54
Posts: 2,363
Wiki Edits: 0

Thanks: 1
Thanked 19 Times in 17 Posts
Quote:
Originally Posted by carsavvycook
We are assuming it is a SBC any different?
sorry---
454 HO

Close pipe adaptor?
I'll be looking for one this week then.
Have one on my pool----1/8 to 1/4---even if that was the size I needed---I'd have to fight Susan for it---She wants her pool working
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Trinary Switch from Vintage Air ElegantInventor Electrical 29 06-15-2011 06:44 PM
Roll Bar Install Advice Mustangsaly General Rodding Tech 12 12-02-2007 08:33 AM
Starter switch stock to modified wiring question. Kallie49 Electrical 5 06-23-2006 06:01 PM
fans not kicking on arnold3521 Electrical 4 02-03-2004 08:35 AM
how to wire up a 12 volt/40 amp relay for eletric fans on a toggle switch? Blown72Camaro Electrical 4 10-02-2003 08:24 PM


All times are GMT -6. The time now is 11:56 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.