Temperature sender - The 1947 - Present Chevrolet & GMC Truck Message Board Network

79gmcc15 · 12-07-2010, 05:00 AM

Hello,

So I just finished breaking in a new motor. And the heads are from a 84 van and my truck is a 79. The temp sender hole is bigger. So we got the BWD WT359. And I think it is not accurate. I think its reading higher then it is. Is this the right sender? The one from my old motor was a 3/8 inch sender, the new one is the 1/2". If this is the right one, then I guess I'll just keep that in mind and live with it.

Thanks!

update:
I am not 100% sure that is the right sender I got. I will look tomorrow when I get back to the shop.

Slonaker · 12-07-2010, 11:02 AM

I had the same problem after my engine swap. The new engine had the larger hole, so I went with a sender from a 70s truck. It indicated very high, and scared the youknowwhat out of me during break-in. I used an adapter to put the old sender in, and it read normal. Get a new replacement sender that is like the old one (or re-use the old one) and you should be fine.

Slonaker

burger · 12-07-2010, 05:58 PM

Use the sender that is correct to your truck with a 1/2 to 3/8 bushing.

79gmcc15 · 12-07-2010, 08:56 PM

Sorry guys I goofed. Its the other way around. Old is half inch and new is 3/8". So I think if I bush that the sender will be to far our. Or??
Posted via Mobile Device

burger · 12-07-2010, 10:15 PM

I had a similar situation with my '73 truck when I put 305HO heads from an '80s Monte SS onto my stock 307 engine. The Monte SS heads had a 3/8 thread and my truck had something larger. I spent a half hour looking through a Napa Echlin catalog until I found a temperature sender with the correct 3/8 thread size and an ohm range that matched the stock sender. FYI, your stock sender is a Napa Echlin TS6640 and has an ohm range of 138 - 156 @ 220°. My truck uses a different sender otherwise I'd dig up the P/N of the sender I used.

Hope this helps,
Ed

79gmcc15 · 12-08-2010, 01:19 AM

Awesome! You rock! That gives me a starting point. Thank you.
Posted via Mobile Device

burger · 12-08-2010, 06:20 PM

Here's a link to the NAPA Echlin website

Click on the 'catalog' link at the top and select the electrical components PDF. The temperature senders are toward the back of the catalog. Easiest to use the table of contents.

vasquezmrysvll · 06-28-2011, 02:02 PM

did anyone ever find the correct sender for the 3/8 hole?

MadManAndrew · 06-28-2011, 03:06 PM

Quote:

Originally Posted by vasquezmrysvll

did anyone ever find the correct sender for the 3/8 hole?

Try calling Napa and telling them what you're looking for.

12-07-2010, 05:00 AM	#1
79gmcc15 Gettin It One Pice At A Time Join Date: Oct 2004 Location: everett, washington Posts: 2,688	Temperature sender Hello, So I just finished breaking in a new motor. And the heads are from a 84 van and my truck is a 79. The temp sender hole is bigger. So we got the BWD WT359. And I think it is not accurate. I think its reading higher then it is. Is this the right sender? The one from my old motor was a 3/8 inch sender, the new one is the 1/2". If this is the right one, then I guess I'll just keep that in mind and live with it. Thanks! update: I am not 100% sure that is the right sender I got. I will look tomorrow when I get back to the shop. __________________ RIP ELJAY Work In Progress 1979 GMC C1500 Trailering Special. Getting the truck done, one piece at a time. “You can tell a lot about a fellow’s character by his way of eating jellybeans.”Ronald Reagan “I don’t know the key to success but I know the key to failure is trying to please everybody.” Bill Cosby Last edited by 79gmcc15; 12-07-2010 at 05:11 AM.

12-07-2010, 11:02 AM	#2
Slonaker Insert Witty Text Here Join Date: Oct 2002 Location: San Antonio, TX Posts: 3,415	Re: Temperature sender I had the same problem after my engine swap. The new engine had the larger hole, so I went with a sender from a 70s truck. It indicated very high, and scared the youknowwhat out of me during break-in. I used an adapter to put the old sender in, and it read normal. Get a new replacement sender that is like the old one (or re-use the old one) and you should be fine. Slonaker __________________ '86 Chevy C10 (Sold 04/19/13 ) Stock '01 Silverado

12-07-2010, 05:58 PM	#3
burger Registered User Join Date: Sep 2005 Location: philly burbs Posts: 160	Re: Temperature sender Use the sender that is correct to your truck with a 1/2 to 3/8 bushing.

12-07-2010, 08:56 PM	#4
79gmcc15 Gettin It One Pice At A Time Join Date: Oct 2004 Location: everett, washington Posts: 2,688	Re: Temperature sender Sorry guys I goofed. Its the other way around. Old is half inch and new is 3/8". So I think if I bush that the sender will be to far our. Or?? Posted via Mobile Device __________________ RIP ELJAY Work In Progress 1979 GMC C1500 Trailering Special. Getting the truck done, one piece at a time. “You can tell a lot about a fellow’s character by his way of eating jellybeans.”Ronald Reagan “I don’t know the key to success but I know the key to failure is trying to please everybody.” Bill Cosby

12-07-2010, 10:15 PM	#5
burger Registered User Join Date: Sep 2005 Location: philly burbs Posts: 160	Re: Temperature sender I had a similar situation with my '73 truck when I put 305HO heads from an '80s Monte SS onto my stock 307 engine. The Monte SS heads had a 3/8 thread and my truck had something larger. I spent a half hour looking through a Napa Echlin catalog until I found a temperature sender with the correct 3/8 thread size and an ohm range that matched the stock sender. FYI, your stock sender is a Napa Echlin TS6640 and has an ohm range of 138 - 156 @ 220°. My truck uses a different sender otherwise I'd dig up the P/N of the sender I used. Hope this helps, Ed

12-08-2010, 01:19 AM	#6
79gmcc15 Gettin It One Pice At A Time Join Date: Oct 2004 Location: everett, washington Posts: 2,688	Re: Temperature sender Awesome! You rock! That gives me a starting point. Thank you. Posted via Mobile Device __________________ RIP ELJAY Work In Progress 1979 GMC C1500 Trailering Special. Getting the truck done, one piece at a time. “You can tell a lot about a fellow’s character by his way of eating jellybeans.”Ronald Reagan “I don’t know the key to success but I know the key to failure is trying to please everybody.” Bill Cosby

12-08-2010, 06:20 PM	#7
burger Registered User Join Date: Sep 2005 Location: philly burbs Posts: 160	Re: Temperature sender Here's a link to the NAPA Echlin website Click on the 'catalog' link at the top and select the electrical components PDF. The temperature senders are toward the back of the catalog. Easiest to use the table of contents.

06-28-2011, 02:02 PM	#8
vasquezmrysvll "the other guy" Join Date: Oct 2008 Location: Olivehurst California 95961 Posts: 901	Re: Temperature sender did anyone ever find the correct sender for the 3/8 hole? __________________ God Said,"Building A 10 Second Import Is Like Coming Out Of The Closet, In The End Ur Still....."EXPLETIVE"



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