Attention: TDR Forum Junkies Just purchased truck on Saturday - drove from SW MO to NE IN ran fine, water temp stayed I would say around 160 with slight peaks up to 180ish on the hills, then Sunday when family and I went to breakfast the temp gauge never seemed to move but we only drove like 10 miles max both ways. Did not think much of it, then last night when I drove to work 30 mins one way (1/2 city level - 1/2 highway 70mph) it never moved then. This got me concerned so at work when I got some free time I went out and checked my rad level - LOW 
Which the seller did say it seeped a little from the tstat gasket (I'm thinking seep my butt, I checked and it's got a little mark down by the head gasket area but can't really tell if it's head gasket or run off from tstat housing) Tstat housing does look a little wet from what I could see with my teeny tiny mirror and a flashlight (was 3 am). So I dumped a gallon of distilled water in her and it seemed to fill it up some, checked the oil and it was black no signs of water - little low but nothing I would get concerned about.
Fast forward to this morning while out ts'n the exhaust brake problem I pop the rad cap low again... holy snickles batman, grab some coolant (diesel rated mind you) and start filling, took about 1/4-1/2 gallon then filled up the reservoiur and took a good look at the cap... Slight slimey film on it, first thought was oil but not sure. Popped the oil fill cap and it was clean no moisture build up. Then took son to school and back, water temp gauge never moved but had heat in the cab (not blast furnance type of heat but was warm - but not warm enough so subside my concerns).
I want to ohm out the water temp sender what readings should I see? I'm an extreme newbie here so bear with me.
Which the seller did say it seeped a little from the tstat gasket (I'm thinking seep my butt, I checked and it's got a little mark down by the head gasket area but can't really tell if it's head gasket or run off from tstat housing) Tstat housing does look a little wet from what I could see with my teeny tiny mirror and a flashlight (was 3 am). So I dumped a gallon of distilled water in her and it seemed to fill it up some, checked the oil and it was black no signs of water - little low but nothing I would get concerned about. Fast forward to this morning while out ts'n the exhaust brake problem I pop the rad cap
low again... holy snickles batman, grab some coolant (diesel rated mind you) and start filling, took about 1/4-1/2 gallon then filled up the reservoiur and took a good look at the cap... Slight slimey film on it, first thought was oil but not sure. Popped the oil fill cap and it was clean no moisture build up. Then took son to school and back, water temp gauge never moved but had heat in the cab (not blast furnance type of heat but was warm - but not warm enough so subside my concerns). I want to ohm out the water temp sender what readings should I see? I'm an extreme newbie here so bear with me.
