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What is the benefit of this over the single stat housing?

Well, that's questionable ... lots of different comments on this topic. Heath has maintained in the past that he feels the single-tstat package works well with a high-flow pump and the right tstat, SSD sells the entire kit (hoses, pump, gaskets, crossover) for only the dual system. Both have had quite a bit of sucess with cooling mods. There was a long discussion over on the 'Page about which worked better, and some pretty smart guys came out not knowing for sure.

I sure don't. All I know is the stock cooling tolerances in these trucks are quite limited, and work best when they all work together; one thing goes whacky and you're pooched.
 
I am thinking of looking for a single and trying it. I was interested in buying this one from turbonator because I think it is a good deal but I can fix mine. I would like to try a single though since my dual makes getting to the IP for adjustment kind of a pita.
 
Last edited by a moderator:
dka99burb said:
I am thinking of looking for a single and trying it. I was interested in buying this one from turbonator because I think it is a good deal but I can fix mine. I would like to try a single though since my dual makes getting to the IP for adjustment kind of a pita.
Click to expand...

The dual housing definitely makes ip adjustment more difficult. No argument there. I don't do it very often though so it doesn't bother me.

The single is reported to cut off recirculating flow in the engine when open, forcing all the coolant to pass through the rad.

Camps are split on whether this is good or bad.

Some think forcing all the fluid through the rad aids in cooling, others think maintaining some flow through the heads and the rad reduces localized hot spots.

Gm installed the dual stats as the single was "supposedly" unable to flow the full rate of the upgraded water pumps.

You have to decide for yourself after looking at the info available. Google actually turns up a fair bit of reading on the subject.

I know what side if the fence I'm on to the subject, but won't put it out there....too many strong opinions on both sides.

I believe I remember reading Heath was fine with the single or dual.

Honestly, you're probably good either way....


Sent from my iPhone using Tapatalk
 
Last edited by a moderator:
great white said:
The dual housing definitely makes ip adjustment more difficult. No argument there. I don't do it very often though so it doesn't bother me.

The single is reported to cut off recirculating flow in the engine when open, forcing all the coolant to pass through the rad.

Camps are split on whether this is good or bad.

Some think forcing all the fluid through the rad aids in cooling, others think maintaining some flow through the heads and the rad reduces localized hot spots.

Gm installed the dual stats as the single was "supposedly" unable to flow the full rate of the upgraded water pumps.

You have to decide for yourself after looking at the info available. Google actually turns up a fair bit of reading on the subject.

I know what side if the fence I'm on to the subject, but won't put it out there....too many strong opinions on both sides.

I believe I remember reading Heath was fine with the single or dual but don't quote me on that.

Honestly, you're probably good either way....


Sent from my iPhone using Tapatalk
Click to expand...




Sent from my iPhone using Tapatalk
 
LOL. Put a STNT thermostat in a single application. The bypass spring isn't quite as long as the ACDelco, so the coolant ISN'T forced through the bypass.

Put a trailer on your butt and find a hill. That should answer the bypass question.

Put the ACDelco back in and you're fine again.
 
from Maxtorque Article said:
During this work, we performed evaluations of both single and dual thermostat systems with the good pump. We realized the best cooling system performance when we combined this improved pump with the older style, pressure-balanced, single thermostat type system. This combination creates desirable pump-pressure in the coolant passages of the cylinder block and heads that helps to prevent steam pockets. Another very important characteristic of this type thermostat is that it simultaneously blocks the water pump bypass port when fully open in order to route all coolant to the radiator under high load conditions. This is our favorite combo.
Click to expand...

Not with an aftermarket cheapie NAPA Stant Tstat, it won't...

Thanks for the articles, BJ
 
Rock Auto has an ACDelco 190* stat, I will be running that when I get the new severe duty fan clutch and Dmax blade, can't wait!

On a side note I added a coolant reservoir after the factory tank. Has anyone ever done this?
I was kinda worried about the lack of pressure in the cooling system and thought that steam pockets could form from the lack of pressure.
Now that I have this reservoir it maintains a constant pressure and it does run a few degrees cooler.

I am just curious if any has reason that I should NOT run this set up.
 
JiFaire said:
LOL. Put a STNT thermostat in a single application. The bypass spring isn't quite as long as the ACDelco, so the coolant ISN'T forced through the bypass.

Put a trailer on your butt and find a hill. That should answer the bypass question.

Put the ACDelco back in and you're fine again.
Click to expand...

I think the "Stant" being discussed, was only refering to the radiator "Cap"


No doubt, "Delco" and "Robert Shaw" are just about the only "T-Stats" that can/should be used in either a single or double T-Stat housing.


I don't think a 15 LB. "Stant" Rad Cap would cause any issues........as Nobby says.
 
Here is the reservoir I installed
dscn0399.jpg

dscn0400.jpg
 
Brooklyn Tow said:
I think the "Stant" being discussed, was only refering to the radiator "Cap"


No doubt, "Delco" and "Robert Shaw" are just about the only "T-Stats" that can/should be used in either a single or double T-Stat housing.


I don't think a 15 LB. "Stant" Rad Cap would cause any issues........as Nobby says.
Click to expand...


The AC DELCO is the only stat to use with a single stat system as the robert shaw design will not block the bypass as it has no pluger on it to do so. The robert shaw design is the one to use in a dual set-up as that is the style GM uses. Also note that the GM stats have rubber seals on them for diesel applications to help completely stop any coolant flow whereas the aftermarket ones will not have the seals in them.
 
THEFERMANATOR said:
The AC DELCO is the only stat to use with a single stat system as the robert shaw design will not block the bypass as it has no pluger on it to do so. The robert shaw design is the one to use in a dual set-up as that is the style GM uses. Also note that the GM stats have rubber seals on them for diesel applications to help completely stop any coolant flow whereas the aftermarket ones will not have the seals in them.
Click to expand...

So the single housing and the double housing use 2 different T-Stats(P/N's)?...........Would a single housing stat work correctly in a double stat Housing?
 
Brooklyn Tow said:
So the single housing and the double housing use 2 different T-Stats(P/N's)?...........Would a single housing stat work correctly in a double stat Housing?
Click to expand...

They are very differrent T-stats fro meach other from a single to a dual. The single housing uses a conventional T-stat that has the plunger on the bottom to block off the bypass when the stat fully opens. The dual housings use a robert shaw style stat where the outside of it slides down.
 
Mine fan definitely kicks on a whole lot less when running empty with the dual thermostat mod. The temperature guage doesn't fluctuate nearly as much as it did before either. Not offering an opinion, this is just my experience.
 
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