Well, I did the HyperTech 160 TSTAT on my '03 L today. I followed posts here that said find the spigot on the rt. (passenger side) of the Main radiator ( not the spigot on the intercooler radiator) and hook a 3/8" hose to it and then crack the valve (white nylon color) and drain off a couple of quarts of radiator fluid so you have less radiator spillage when you pull the stock TSTAT out.. Anyway, had hose in place, cracked spigot and only say a half a quart would come out and no more. Curious why no more would come out when guys here lead one to believe a lot would come out?? So, got out what I could and then easily pulled the stock TSTAT and replaced it with the HyperTech 160 TSTAT. Spilled say a quart of radiator fluid on the ground (was hoping one of the girlfriends cats would drink it) and had to gently flush spilled radiator fluid off the top of the L's engine after the 160 TSTAT install. Procedure was easy compared to the TSTAT change I did on my last truck a Dodge Dakota Quad Cab with 4.7 powerplant. Damn TSTAT was on the bottom there and a pain to get to... SO, care to comment on how much fluid you got out of your spigot, big guy.. ho, ho, ho
p.s. Got the TSTAT from TruckPerformance.com for $17.00.

 

Did you take off the radiator cap while draining?

 

--Joe

 

I hear the 160 deg tstat is too low for the ideal operating temps for your trucks? Any truth in this?

 

Yes..........

 

I've been running one for about a year and a half without any issues.

 

I researched this prior to buying the 160. From what I could find on the internet (and that was quite a bit) the L's engine builds better power (Dyno proven) with the HyperTech 160 TSTAT versus say a 180. As far as Winter and heat the 160 allows plenty heat enough. SO, best bet is go with the 160.

 

'Don't know then. Maybe some blockage in the drain spout; or, you didn't open it far enough. Doesn't really matter, you got it installed.

 

nah, mine ran awesome in my truck......

 

Mass Flow Rate of Intake Air
Allows Engine to Cool Down to Lower Temperature than Factory Thermostats
Reduces Engine's Tendency to Detonate
Reduce Temperature of Both the Incoming Air/Fuel Mixture and Combustion Chamber Surface

Promo:
A Hypertech PowerStat low-temp thermostat improves performance in two ways: first by increasing the mass flow rate of intake air and second by reducing the engine's tendency to detonate.

From the laws of physics, cooler air is denser than warmer air. Since horsepower increases as the amount of air and fuel burned increases, cooler air (with more air molecules per cubic inch) makes more power. The PowerStat allows the engine to cool down to a lower temperature than the factory thermostat to make more power. At the drags, water can be sprayed on the radiator between races to drop the temperature and improve performance, but the PowerStat ensures that you leave the line at the same temperature each run to give consistent maximum performance for bracket racing.

Detonation, usually producing audible pinging or even knocking sounds, refers to the spontaneous explosion of the unburned air/fuel mixture in the combustion chamber. Detonation abruptly and violently ends the normal combustion process, reduces power, and can severely damage the engine. A PowerStat reduces the temperature of both the incoming air/fuel mixture and the surfaces of the combustion chamber, greatly reducing the tendency to detonate, and allows the engine to safely develop more horsepower.

 

Chris:

"Driven" has become "Tuesdays With Morrie"...

<---in his housecoat right now.

 

I dont know about all that.......

It took my truck forever to warm up when it was cold outside....

 

that sucks!!!

U better get well if u want to get sum @$$ from that chick....