temp sender ? again

[boatpuller]

your right on..............i started with the cheapest angle of attack..cap.. the cap was bad..problem solved.i got pressure.i'm still reading about 1/4 on the c to h range closest to c..but i got a new 4 row.it never seems hot.so,i've really got no reason to think it's wrong.i guess i could try the old meat thermometer trick.

[Slonaker]

Originally Posted by 72c10

So is there a newer ( small sender) that takes one wire or are they all two wire? if so how do you wire it?

Newer trucks use a smaller sender than the old ones used. I suspect that the smaller sender goes with the gauge that reads actual temp and the bigger sender goes with the one that just has a C to H scale. Both use one wire. On my '86, the one wire is green if that helps any...

Slonaker

[75sierraclassic]

Originally Posted by ureckme

Here is the what I did. I have a 74 that takes the large sender (80ohm) I put on newer heads that take the smaller sender (160ohm). The 80ohm sender is for the cold/hot type gauge and the 160 is for the one that tells your temp. So if you put newer heads on a older truck (73 to 8?) that has the cold/hot type gauge. Use 2 small senders 1 in each head and run a wire from each to the wire to the gauge.

Matt

I encountered this when I rebuilt my 75 350. I put newer 305 heads that has the smaller hole. The sender from my original heads was too large. I went to the parts store and got a temp sender for an 80's truck with a 305. It fit the heads, but my Hot-Cold temp gauge read really low. At operating temp it is barely over the cold tick mark. Does anyone know where you can buy the gauge with numbers on it? LMC didn't have it.

[boatpuller]

Originally Posted by 75sierraclassic

I encountered this when I rebuilt my 75 350. I put newer 305 heads that has the smaller hole. The sender from my original heads was too large. I went to the parts store and got a temp sender for an 80's truck with a 305. It fit the heads, but my Hot-Cold temp gauge read really low. At operating temp it is barely over the cold tick mark. Does anyone know where you can buy the gauge with numbers on it? LMC didn't have it.

there on ebay alot.i bought one from a guy it works fine.just check they have good feedback and the gauge is tested.

[Ivan D.]

Okay, I tried making some sense of all that, but as usually I failed miserably, lol So here's my problem - I have a '79 Chevy C10 with a C-H temp gage. The sender is located in the left head behind plug #1, is pretty darn big in diameter, and when used with a 160F thermostat makes the gage read in the middle of the C-H range. Same setup when used with a 192F thermostat makes the temp gage read straight in the red area behind the "H" mark. I'm pretty sure these engines like the 192F thermostat, so really the 192F thermostat should make the gage read exactly where the 160F makes it read. Reason for all that mess - my truck came with a straight-6, and it has a 350 V8 swapped in it. What temp sender do I need to make the gage read lower?

Edit: I also have a new Offenhauser 360 intake waiting to be installed, it has ports for both the large and the small senders, so fitting a sender with diameter different than my current one ain't no issue at all.

[Slonaker]

I would get on autozone.com or another similar site. Look up the sender for your truck with the six cylinder since that is the one that should work right with your truck. See if it is the same as you have. If not, try using it.

The sender doesn't know which engine you have...

Slonaker

[Ivan D.]

Lol, good idea Sloanaker, will do that.