77 K10 LS Swap

[Madhorn]

Its good to know that local parts stores should have replacements. I will just have to see how long the PEX lasts.

 

[rpcraft]

they can be found between the Help brand and Dorman has them as well. I think they also come with the new bolt in case your's has a groove worn into it. I believe that the replacements are made of delrin, which is a really durable material.

 

[Madhorn]

What coolant temp sensor in 5.3 works with stock 77 temp gauge? I am currently using a mini automated sensor but the gauge barely registers a temp but the computer says 190. Trying not use the large 1/2 NTP 77 factory sensor.

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[crpntr78]

That Pex trick has been around several years. Even a write up about it on here.

 

[rpcraft]

What coolant temp sensor in 5.3 works with stock 77 temp gauge? I am currently using a mini automated sensor but the gauge barely registers a temp but the computer says 190. Trying not use the large 1/2 NTP 77 factory sensor.

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i used a three wire sensor for F bodies and it has feedback for the stock gauge and the pcm. Goes in the stock location. ACDelco 12551708. Cost about 21 bucks on Amazon. The pigtail is part # HP4440 and it will also come up as a TPS and MAP sensor but its for the coolant temp as well.

 

[Madhorn]

Awesome. I will have to look into that.

 

[Madhorn]

Ok. I am going show off my ignorance again. . My 77 currently is running a 03 5.3 and has factory gauges. I purchased a so called LS swap gauge adapter kit that came with a temp sensor. With it installed my coolant temp gauge barely moves when the engine is at operating temp 180 ish. I called the manufacturer of the sensor and they said it would not work with the factory gauge. . My concern now is, Will the 98 Camaro temp sensor work with a 77 gauge. Thought I read some where that the gauge resistance values changed some time in the 80s.

 

[rpcraft]

It works... Just use the pig tail and sensor I linked.. Keep your receipt of course but I have been told by a gentleman who does swaps for a living that is the unit to use and they use in their vehicles.

 

[Madhorn]

Thanks. I will be trying that set up soon.

 

[Madhorn]

Parts have been ordered.
12551708. Temp sensor $22
HP4440. Pig tail $10
Amazon is awesome.

 

[Madhorn]

Update to my driveshaft saga. Shortly before installing the 4 degree wedges/shims to improve my pinion angle my new drive shaft lost its rear balance weight. While i had it apart installing the shims I welded a what believed to be a like weight washer in place of the missing weight. End result was a drive able truck with very little vibe if any. Where I messed up was calling the place that made the shaft and telling them. They wanted me to bring the shaft back to rebalance. So I did. Now its worse than it was when I started this whole mess. I reinstalled the old driveshaft just to see if there would be a difference. The old shaft runs better than the new one!!! I will be making a phone call in the morning.

 

[Madhorn]

Drive shaft issues continue. Took it back Monday. Watched them rebalance the shaft and everything looked good. But once back in the truck, there was still a vibration. With rear end on jack stands and truck running in gear, I can see a wobble in the shaft at the splined slip joint. Sent the drive shaft place a video of the wobble, they want it back again. This is getting old. Will try and drive 77 there next time. I in stalled the old drive shaft the slip joint at the rear and it’s at least driveable. Stay tuned.

 

[Madhorn]

Coolant sensor and pig tail arrived today. . Plan to install this weekend.

 

[rpcraft]

Sounds like they don't have the flanges centered. Probably misaligned while welding if I had to guess. Some guys never do learn how to counter heat distortion properly.

 

[Madhorn]

Installed the new coolant temp sensor and pig tail today. Did not work. Well, it gave me the same result I was getting from the mini senor I installed in the water pump, barley registering a temp. Its either a bad gauge or the sensor and gauge are incomparable.