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Old 08-03-2017, 01:31 AM   #45
MotoWells
Registered User
 
Join Date: Apr 2015
Location: Port Orchard, WA
Posts: 38
Re: LS Cooling Issue

Spent the day over working on the rig, I have little more data to share with you fellas.

Quick Synopsis if you don't want to read details:

- Found wires were reversed on fans - I'm an idiot
- Put heater hoses back on
- Burped system for entire day
- Ran coolest it ever has (longest trip to date)
- Ran 190-200 for quite a few miles after hill climbed it jumped to 240 and stayed there and backed down to 230 ~225 with heater running (technically stabilizing ?)
- Heater helps pull down temps
- From temp readings it appears to be a thermostat issue?

Details

Steps Taken Today:

1. Removed one of the two fans from the fan pigtail

2. Reversed leads to what I had and immediately got a lot more CFM
!! I had these wired wrong (black is not always ground)!!

!! I really thought I had found the silver bullet here. !!

3. Reconnected the heater top and bottom hose. The loop back didn't help from previous test so put it back.

4. Wired up one of the fans to come on immediately once the car was started.

5. Burped system for entire day on incline as recommended

Results:

Heater and fan on, took drive, longest drive to date.

Temps were good for quite some time (8 miles) 190 - 210

On the way home they started to climb as headed up a slight grade

Temps went from 205 to 220 and then to 230

I give it a bit more gas to get more airflow through and the temp starts to climb a bit more - 240.

Pulled into driveway and popped hood. Temps stabilize around 240 and then with heater blasting slowly came down to 230 and then 225.

Let it cool down and then attempted further burping.

Ran it one more time with similar results.

Took some readings with the new laser temp deal. Interesting results.

Temps seem to be cooler around the thermostat. Could that be the next step? Replace the stock / new thermostat?

Readings:

> Thermostat Housing - 150 -170 (highest maybe 182)
> Radiator - 224
> Engine Block - (191 - 210)

Let me know your thoughts

Thank you
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