Go Back   Corvette Forum > C3 Corvettes, 1968 - 1982 > C3 Tech/Performance
Sign in using an external account
Register Forgot Password?
Register Search Today's Posts Mark Forums Read FAQ Vendor Directory
Search
C3 Tech/Performance
V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette Sponsored by
VBP

Welcome to Corvetteforum.com!
Welcome to Corvetteforum.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Corvetteforum.com today!


Corvette Store
 
 
C7 Parts & Accessories
C6 Parts & Accessories
C5 Parts & Accessories
C4 Parts & Accessories
C3 Parts & Accessories
C2 Parts & Accessories
C1 Parts & Accessories
Wheels & Tires
Sponsored Ads
 
 
Vendor Directory
  
Reply
 
 
 
 
Thread Tools Search this Thread
Old 05-03-2006, 07:34 PM   #1
JPhil
CF Senior Member
 
Member Since: Oct 2004
Location: Loveland Colo
Default Water temp sensor for AFR heads.....

OK, OK, I know there was a thread just a couple weeks ago and others in the past. My search efforts have yeilded great amounts of frustration and very little hard info. Sorry.
I'm changing out my '73 small block OEM iron heads to AFR 180s. The OEM water temp sensor has 1/2" NPT threads. The AFRs need 3/8" NPT. My OEM sensor calls out to be 80 ohms @ 220 degrees. So far, no luck at parts counters or the web. Got e-mails in to NAPA, Borg-Warner, and Stewart-Warner, but no replies yet.
My Wieand manifold has only one 1/2" tap, I need that for my heater hose. My guages are all stock and work fine, I'm not going to change them. I don't want a big cobbled-up bubba adaptor on the engine. I would prefer to not have to put a resistor in the wire to adapt the ohms, but I will if that's the only way.
I've looked for the Borg-Warner Volvo unit #WT510 and the Standard #TS76 but could not find the ohm rating, so am leery of getting one of those on a "maybe".
Anybody ever come up with something conclusive?
Thanks,

John
JPhil is offline   Reply With Quote
Old 05-03-2006, 07:40 PM   #2
jdmick
CF Senior Member
 
jdmick's Avatar
 
Member Since: Oct 2004
Default

I put a WT510 sender in my vortec heads and also left the stock 1/2" sender in place by the thermostat so I could compare the two. The 510 works OK but will make the guage go into the red for a while until settling down where it reads about 20 degrees warmer than the stock sender. So I haven't decided for sure what to do yet but I really hate the stock sender right below the upper hose. I guess the 510 would still alert me to a problem if there is one so I'll probably stick with it.

Last edited by jdmick; 05-03-2006 at 07:53 PM.
jdmick is offline   Reply With Quote
Old 05-03-2006, 07:48 PM   #3
enkeivette
CF Senior Member
 
enkeivette's Avatar
 
Member Since: Sep 2004
Default

You need to use the stock style sensor if you're using a stock style guage.

There is a 1/2 to 3/8 pipe plug adapter that you can use. Or I can send you my old one if you can't find one. I used it for about 1200 miles and it worked fine.

Now my temp sensor is just mounted in my intake manifold. Works just as good if not better.
enkeivette is offline   Reply With Quote
Old 05-03-2006, 08:02 PM   #4
JPhil
CF Senior Member
 
Member Since: Oct 2004
Location: Loveland Colo
Default

jd,
What do you do for your heater hose connection?

torq,
I can come up with some kind of adaptor to get my 1/2'" male into a 3/8" female I'm sure, I just want to avoid a big, well, uh, *****-looking thing hanging off the side of my block. Plus I don't want to have to remove it and spill coolant all over when I remove/replace my headers....

Shoot, I gotta go now. Prob'ly be tomorrow before I can check back, but thanks--

John
JPhil is offline   Reply With Quote
Old 05-03-2006, 08:07 PM   #5
C3 Stroker
CF Senior Member
 
C3 Stroker's Avatar
 
Member Since: Oct 2004
Location: Youngstown Ohio
Default

I put the stock temp sensor in my intake manifold when I got my AFR's. It really does work just as well. If you want, you can have the 3/8" hole in the AFR's machined out to 1/2" as some have done. AFR will do this, if you if you order from them and let them know before they send your heads, or if you wish to send them back to have it done.
C3 Stroker is offline   Reply With Quote
Old 05-03-2006, 08:15 PM   #6
jdmick
CF Senior Member
 
jdmick's Avatar
 
Member Since: Oct 2004
Default

Quote:
Originally Posted by JPhil
jd,
What do you do for your heater hose connection?
Without looking I believe I screwed a 1/2" NPT fitting with the hose barb on the other end into the thermostat housing. The other hose goes into the water pump.
jdmick is offline   Reply With Quote
Old 05-04-2006, 02:17 AM   #7
enkeivette
CF Senior Member
 
enkeivette's Avatar
 
Member Since: Sep 2004
Default

Phil, it didn't look that bad. I spent an hour in my local auto parts store searching for a temp sensor with the same resistance for a 3/8 hole. No luck. I think you'll find the same. What kind of intake are you using?
enkeivette is offline   Reply With Quote
Old 05-05-2006, 12:54 AM   #8
JPhil
CF Senior Member
 
Member Since: Oct 2004
Location: Loveland Colo
Default

Hey guys, think I got it worked out. I was approaching it from the wrong direction.....A friend at a shop gave me a water neck from a 72 Chevy truck which is identical to mine except for a 1/2" NPT tap for the OEM sensor in the top. I could use it for the sensor or heater connection, it would just have to wait for the water temperature to open the t-stat. Then when I got back home I realized my Wieand manifold has a 3/8" tap as well as the 1/2". Today I went to NAPA and got a 3/8" heater hose fitting. So now I can put my OEM sensor in the manifold 1/2" tap, the heater in the 3/8" tap, and have a "spare" 1/2" tap on the neck for a screw-in mechanical guage as well. I ended up plugging the 3/8" holes in the heads.
I be pooping in tall cotton now, I had just worked myself into a tizzy by not talking it over with friends before jumping to conclusions.....I will still be interested to see if the parts companies respond, and if they do, I'll post it.
Motor should be on the run stand Saturday, if all goes well. I'm excited.
Thanks for your replies,

John
JPhil is offline   Reply With Quote
Old 05-05-2006, 06:38 AM   #9
Guru_4_hire
CF Senior Member
Cruise-In IV Veteran
Cruise-In V Veteran
 
Guru_4_hire's Avatar
 
Member Since: Apr 2002
Location: All humans are vermin in the eyes of Guru VA
Send a message via AIM to Guru_4_hire
Default

why not just put a resistor in the wire line?
Guru_4_hire is offline   Reply With Quote
Old 05-05-2006, 06:49 AM   #10
enkeivette
CF Senior Member
 
enkeivette's Avatar
 
Member Since: Sep 2004
Default

Quote:
Originally Posted by torqvette
Now my temp sensor is just mounted in my intake manifold. Works just as good if not better.
enkeivette is offline   Reply With Quote
Old 05-05-2006, 09:58 AM   #11
70 LS1
CF Senior Member
 
70 LS1's Avatar
 
Member Since: May 2001
Location: Gig Harbor Wa
Default

Quote:
Originally Posted by Guru_4_hire
why not just put a resistor in the wire line?
That may or may not work. I ran into a similar problem when swaping to the LS1. The only port in the head was only big enough for 1/8NPT.

You need to know more than just the resistance reading at a specific temperature. You also have to know the rate of change. Like how many Ohms for every degree change in temp. I found one sensor that was dead on around 210-220, but when installed in the car the meter barely came off the low peg. I actually got a little above 220 while working out some cooling bugs and the meter slowly came up to mid range then very quickly pegged high.

Like was said above. Use the correct sensor for the correct meter.
70 LS1 is offline   Reply With Quote
Old 05-08-2006, 10:27 AM   #12
JPhil
CF Senior Member
 
Member Since: Oct 2004
Location: Loveland Colo
Default Reply from NAPA

Here's what NAPA sent to me. I guess I won't be able to verify it because, as you read above, the point is now irrelevant for me. I hope this may be able to help someone else...

John


"Thank you for visiting NAPAonline.com. The water temperature sending unit that you are searching for is available at local NAPA stores, and can also be ordered at NAPAonline. The part number is TS6641. To order a part online or obtain more information about it, at our home page scroll down to search by part number, insert part number and click Go. Follow the instructions and prompts on your screen.

Again, thank you for visiting NAPAonline.com.

Regards,

Customer Support"
JPhil is offline   Reply With Quote
Old 05-08-2006, 10:27 AM
 
Go Back   Corvette Forum > C3 Corvettes, 1968 - 1982 > C3 Tech/Performance
Reload this Page Water temp sensor for AFR heads.....
 
 
 
Reply

Tags
38, afr, c3, chevy, corvette, heads, intake, npt, pipe, plug, sender, sensor, temp, water, weiand


Thread Tools Search this Thread
Search this Thread:

Click for Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
C5 Stock Shifter Part Numbers Mikey70 C5 Tech 4 04-22-2008 09:53 PM
'95 OBDI & O2 Sensors...?? LannyL81 C4 Tech/Performance 1 03-28-2007 09:57 PM
Testing the Volvo temp sensor in my 69! Smokehouse69 C3 Tech/Performance 21 12-05-2003 07:23 PM
Temp Sensor Position?? Smokehouse69 C3 Tech/Performance 6 11-04-2003 05:31 PM
Clutch kit + labor ChandlerL C4 Tech/Performance 4 05-29-2003 03:00 PM


All times are GMT -4. The time now is 06:20 PM.


Emails & Password Backup