350 Block Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Marv D · 01-02-2014, 11:46 AM

... or a brass bushing and your existing temp sender will fit.
Remember the late 90's Vortec motors has one sender for the computer, another for the dash gauge.

The temp sender uses the GROUND of the sender to relay the signal back to the gauge/computer. Make sure you have a good engine ground, and I'd suggest you insert it DRY into the head,,, I try to resist the temptation to use teflon tape and such that can be detremental to the GROUND. Brass fittings do a really great job at sealing without any tape / sealing compounds.

storm9c1 · 01-02-2014, 10:39 PM

Quote:

Originally Posted by Marv D

I'd suggest you insert it DRY into the head,,, I try to resist the temptation to use teflon tape and such that can be detremental to the GROUND. Brass fittings do a really great job at sealing without any tape / sealing compounds.

Partially true IMHO. Yes, brass does a good job of sealing. I've also had them leak without using tremendous torque. It can go either way.

Teflon tape will not affect ground. The Teflon only fills the voids. There is enough metal-to-metal contact to shave off the tape around 90% of the fitting.

The only exception to this would be for knock sensors on modern engines. Tape can affect the those since these connections are more mechanical to the block than electrical.

If you still don't believe me, scroll to the last page of this document. They tested sensor readings with and without tape.

http://www.lbfun.com/warehouse/tech_...eCF-Thread.pdf

gulfcoast66 · 01-04-2014, 01:36 AM

Quote:

Originally Posted by marv d

... Or a brass bushing and your existing temp sender will fit.
Remember the late 90's vortec motors has one sender for the computer, another for the dash gauge.

The temp sender uses the ground of the sender to relay the signal back to the gauge/computer. Make sure you have a good engine ground, and i'd suggest you insert it dry into the head,,, i try to resist the temptation to use teflon tape and such that can be detremental to the ground. Brass fittings do a really great job at sealing without any tape / sealing compounds.

x2..

01-02-2014, 11:46 AM	#1
Marv D Registered Truck Offender Join Date: May 2008 Location: hells training ground (aka Ariz) Posts: 3,118	Re: 350 Block Question ... or a brass bushing and your existing temp sender will fit. Remember the late 90's Vortec motors has one sender for the computer, another for the dash gauge. The temp sender uses the GROUND of the sender to relay the signal back to the gauge/computer. Make sure you have a good engine ground, and I'd suggest you insert it DRY into the head,,, I try to resist the temptation to use teflon tape and such that can be detremental to the GROUND. Brass fittings do a really great job at sealing without any tape / sealing compounds. __________________ Still playin with trucks, even at my age! When you're dead, it's only a problem for the people around you, because you don't know you're dead. .....It's kinda the same when your STUPID. I just did my taxes and reviewed my SS statement. Thanks to the current administration it looks like I will only have to work till noon on the day of my funeral.



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