some one had tried a tstat from Datsun but they never milled the manifold to accept it, they just tried to stick it between the manifold and the water outlet so it did not work.

 

Yea, that defiantly wouldn't work. I found a pretty small thermo. Its for the newer jeeps from Mishimoto (Throwback to my tuner days). With a little milling of the manifold and some modification to the outlet, it should fit. That, combined with the inline mod, and some electric fansn should be just about perfect, with no temperature fluctuations at all.

I know everyone one is like , oh, my system works perfect stock, but the stock system is stupid. I deal with Mercedes cooling systems and with twin turbos, multiple intercoolers, and two reservoirs, the thermostat is in the block. On every single car. Yea, the thermo may go bad ( pretty common repair for every car on the planet) but we don't deal with 10 degree temp swings, and dam sure don't have overheating issues. And these things run hot, all day long.

 

I just seriously feel like many haven't considered the engineering behind the OE system when they casually talk about throwing an inline tstat on these cars.

I WISH I COULD DO IT.

But trust me, if you stared at the diagram for an hour like I did, you'd eventually realize that.. wow.. super bad idea.

At the very least, it will create more problems than it will solve (assuming you're willing to keep your stock system well-maintained) - as the OE design is incapable of supporting full-pressure coolant through the heater core loop. It was ENGINEERED FOR A BYPASS COOLING SYSTEM. The block, the heater core, the hoses, the manifold, etc.. all of it.

Rave quote.. The amazingly funny thing here is that if you were given a vehicle with an inline tstat and came across this info, a "bypass tstat mod" would be all the rage on the forums! Everyone would be doing it. Ugh. Just stick with the design of the original engine! You can change a few hoses and stuff, but not where the coolant exits the engine and a lack of tstat bypass in the engine. You don't have a choice here people.

I just feel like the only thing saving the inline mod is the fact that the heater core designers probably over-engineered the specs by 50% for whatever manufacturing reason. Just still seems like tempting fate.

Faced with this knowledge, NO ONE who has had to get to a DII heater core would think about doing this. Literally open heart surgery lol.

 

Fully pressurized heater core....huh?
My inline when open allows free flow through h core and rad...same as open stat in stock system, excep when inline is closed there is no flow to the h core.....unlike the extra pressure in the stock bypass set up

Puff puff pass

 

p, p,p

 

It was more that an hour. More like an hour, fifteen maybe an hour and twenty minutes.

And as the last gentleman said to you in the last thread you went on about in line thermostats, we are not gonna agree here. So let's just agree to disagree and keep it moving.

I don't know what these guys were thinking when the designed the cooling system, but it's the same guys who decided to put a non serviceable driveshaft above an AC drain and right next to the exhaust. If you are fine with that, then put another non serviceable driveshaft in your truck and tell me how that works out for you.

 

I may be wrong but I seem to recollect the TD5 thermostat operates/opens at a significantly lower temperature than the v8.

 

yes td5 is the 180....v8 is 190

 

----> 90 Degree Inline Thermostat Parts Photo by Innernet | Photobucket

----> 90 Degree Inline Thermostat Installed. Photo by Innernet | Photobucket