where is the thermostat?

[Don Tanklage]

'92 1 ton 4x4



is it in the elbow that doubles as the alt mount?



if so, when i replace it what gskts are req?



i noticed that there is another bracket behind it, an eye thing for pullin the motor



is any of this stuff o-ringed?



are there diff temp stats avail?



is so, what is recommended?



dodge doesnt have them in stock



forget about pepboys or those places



cummins has one for 30 bucks...



going to cummins



will check back when i return



any help appreciated



don



ps - going to get some propolyne glycol for it while i am out



any advice on mixture?



thnx again

 

[dpuckett]

Don,



The alternator bracket mounts to the t-stat housing. It is in the elbow that comes out of the engine then bends around to the upper hose. There is an $8 gasket/ rubber seal that goes in there. NO RTV or similar stuff required. It all bolts back together like it came apart. Be sure to get the tapered/ notched side of the gasket toward the t-stat; the t-stat itself has a side stamped "to engine" or "to rad" or something like that.



Daniel

 

[Don Tanklage]

thanks



ordered the seal too, but at cummins there is already one in the box



i checked before i paid



there was also a blue plastic thing in there



dont know what it is for tho...



left it in the box



cummins said 180 deg so i said okay



should i a got a cooler one or will it get better milage or something like that at 180?



thanks again, don

 

[Don Tanklage]

ps - used a 50/50 blend for the propo gly and the thing wont get past 120 idling...



is that normal?



its got over 120k miles on it



tank

 

[Don Tanklage]

ppppps - after test driving it (with 12k# trailer) it got up to 180 no prob



well, it took some throttle to get it there but it went



now, idling, it is at 175 and holding



guess thats cuz i drilled a . 100" hole in the stat...



anyways, no air pockets, its full of good coolant, and ready to take me to the races



have a great weekend



don

 

[dpuckett]

180 is the coolest I'd want to go. If you are under 300hp and have a good cooling system, you shouldnt need a cooler thermostat. 1stGens arent known for overheating, that's for sure. And I'm surprised it got up TO 120 idling.



DP

 

[sdstriper]

thanks



ordered the seal too, but at cummins there is already one in the box



i checked before i paid



there was also a blue plastic thing in there



dont know what it is for tho...



left it in the box



cummins said 180 deg so i said okay



should i a got a cooler one or will it get better milage or something like that at 180?



thanks again, don

You got the kit Don. That Blue plastic template is for the head casting, there were some issues with the t-stat hanging up in the opening, open or closed. TSB on it way back when, the head may have a stamp on it above the Injection Pump if it was addressed. If not you use the template and grind out the hole to match.

 

[Don Tanklage]

180 is the coolest I'd want to go. If you are under 300hp and have a good cooling system, you shouldnt need a cooler thermostat. 1stGens arent known for overheating, that's for sure. And I'm surprised it got up TO 120 idling.



DP

orig owner bob simerly spent some cash on this one so i am thinkin he had some cooling issues...



has a huge 4 core and had a high flo stat on top of that



seems pretty good now, but then again i have not taken it over the grapevine yet



thanks for the info

 

[Don Tanklage]

... ..... If not you use the template and grind out the hole to match.

pretty sure the hole in the head was large to accept the stat



mod musta been done in order for that honkin high flow thing to fit in there?



dont see any special stamp on cyl head tho...



but thank you for the info



great site!

 

[sdstriper]

Here's the TSB info on the t-stat head casting.



TSB 07-01-91