LS-1 Swap Into K5 Blazer....Need Suggestion with Temp Sensor

[wildmanaaron]

Everything has lined up great but a few little snares have set me back a little bit.

For one, the temperature sender that I pulled out of the motor that was in the Truck is a large threaded sensor from GP Sorensen, Part #TSU64. The threads on this thing are a whopping 11/16" or 17mm wide!! It has a one blade male plug for the wire to clip onto. But I haven't been able to find a reducer or adaptor to use this sensor again. My factory engine harness only has a one-wire connection for the temperature sensor on it. The local parts stores have tried to sell me the femal plug in type temp sensor but I have told them my harness has one wire, not two as these female sensors require.

I am going to install this sensor in the M12x1.5 plug in the Passenger side head at the rear.

Does anybody know if there is a smaller one pin sensor that would accurately read correct at my gauge, preferably a 1/8x27" NPT sensor.

[RedHeartbeat]

Street and Performance sell adapters to fit anything, any size into the water fitting in the head. Contact them for whatever fitting you need.

[wildmanaaron]

I called them earlier today and I have to call somebody else back tomorrow about it now.

<div class='quotetop'>QUOTE(RedHeartbeat &#064; Jul 8 2007, 11&#58;02 PM) [snapback]99001[/snapback]</div>

Street and Performance sell adapters to fit anything, any size into the water fitting in the head. Contact them for whatever fitting you need.
[/b]

[airdeano]

youd have to drill and tap say the water pump to use the 1/8" style
sender. no there isnt a "done fix" for this. in 1998, the f-body had a
three wire setup, two for PCM, one for dash... again the large
15mm x 1.5 size. im not sure you have that kinda room on the later
heads to drill and tap..
i opted for the 2003 cluster to match the op, ct from the PCM serial data.

airdeano

[wildmanaaron]

<div class='quotetop'>QUOTE(airdeano &#064; Jul 11 2007, 11&#58;45 PM) [snapback]99252[/snapback]</div>

i opted for the 2003 cluster to match the op, ct from the PCM serial data.

airdeano
[/b]

I am thinking about trying to use a similiar female plug temperature sensor and then trying to adapt the wires. My Truck only had a one wire sensor from the factory. I just wonder if I could find a smaller thread temp sensor that would also read right on my dash cluster.

[wildmanaaron]

<div class='quotetop'>QUOTE(RedHeartbeat &#064; Jul 8 2007, 11&#58;02 PM) [snapback]99001[/snapback]</div>

Street and Performance sell adapters to fit anything, any size into the water fitting in the head. Contact them for whatever fitting you need.
[/b]

Nobody sells a fitting to adapt a sensor that big down to a M12x1.5.

Does anybody know if using a diferent model temp sensor would affect the reading at the cluster much?

[RedHeartbeat]

As long as it has the same internal resistance as what you took out, you should be able to replace it with a different one.

[RedHeartbeat]

That fitting in your old engine is an NPT (national pipe thread) and is tapered in shape. It&#39;s a 3/8NPT, I believe. I&#39;ll have to look at my taps when I get home to be for sure on what size it is.

[RedHeartbeat]

http://www.plumbingsupply.com/pipethreadsizing.html

3/8" NPT

[wildmanaaron]

Yes that is correct, but the threaded part is 5/8". The stock sensor that works with my dash cluster 73-86 (87 sensor is two wires, First year for TBI in Trucks), measures 138-156 @ 220*.


I am about to scream. I have seen several Trucks with LS-1 engines in them who have run their stock cluster or that I thought did anyways&#33;