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The dual housing T-stat # is 131103 and is 2 1/8 diameter. The single T-stat is # 13191 and is 2 17/32 diameter. (Both ACDelco #s) I haven't found anything about flow rates yet but I haven't looked much :thumbsup:

Stay away from Advance, check out RockAuto...

That is more than true I am sure! Nothing right now just some mild to moderate blowby and I want to keep it that way until I am ready for a complete rebuild...:agreed:

Yes, I plumbed it from the overflow line. So this may actually be a way to monitor whether I am having issues with the cooling system, like head gaskets. Interesting.... No I have to just find a 15# non vented cap, install the Heath fan and clutch, and the 190# AC Delco t-stat and I should be...

Checked the other cap, the 16# cap and it IS vented. They gave me the wrong 16# cap which is why I had no pressure until I put on the 13# cap! So would the recovery reservoir hurt the system if I were to leave it in place?

Hmm, I will take a look at the cap, it was the cap that was called for at Napa to replace the OEM. So the vented caps are held closed by the coolant, and the non vented caps are held closed by a spring.... Now that makes sense about how pressure is built in the system, but it is an OEM cap...

Well I was not losing coolant out of the reservoir, but I also had little to no pressure in the system, even at 205*. This makes no sense to me, how can a system cool properly with no pressure? From what I can tell my head gaskets are good, I am not loosing coolant, no white smoke, no oil in...

So I brought this up in another thread and though maybe it needs its own. Has anyone installed a coolant recovery tank after the factory coolant tank? I was thinking about coolant and its relationship with the heat and pressure in the sealed system. I have read that these blocks and heads...

It could be a knock off like this

Here is the reservoir I installed

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...

I believe they are NOS seat covers, they are very nice. I may add some heaters as the wife always complain they are cold.

Good call on the welder Paul. every gal needs a good welder, you know for when you are not home:love:

Raising the dead here! I am in SLC, 1 block north of the U of U.

What is the benefit of this over the single stat housing? I have read that the single flows just as much. Staff Edit: link back to the housing Dave is referring to. http://www.thetruckstop.us/forum/showthread.php?33719&p=390484#post390484

Okay so the 2839 fan clutch engages at 170*, which is about 180* coolant temp, that is great, but will the Dmax fan bolt on to it? And the prices are much higher than what the thread says now. The lowest I found was $116 then the fan. I found a Heath assembly on Fleabay for $150, might go that...

I will be ordering the SSDiesel Duramax fan and clutch this week... http://www.ssdieselsupply.com/product_2_6.5_Turbo_Diesel_Cooling_Fan_Upgrade_early.html#anchor_pimage

So that is stock with just a 3" DP and 4" exhaust? Sounds great, have you noticed any power gain?

It has very little resistance, when I took it off the check the spring I noticed the oil on it. It had some resistance, but it turns very easily.

Oh and one other thing, not sure if it makes a difference, it has 5w40 oil in it. I am going to change it later today with 15w40, see if that helps.