My truck has ran with eng and oil temps being around 198 and seeing 208 in the summer with the A/C on high. Today will driving on the interstate it climbed to 252 eng temp. My speed was 78 with rolling hills and pulling nothing. I let off the pedal and coasted over and down the next hill. The temps lowered to 222 eng and 212 oil. My speed was 64. It cooled down to 210 on both and just to be sure, I got off at the next exit and checked what I could. The coolant tank was a little lower than normal. I keep mine about half full and it was at a 1/4 or less.
When I got back on the interstate I noticed the fan clutch was engaged when I pulled out from the light. So... I ruled out the fan clutch. I didn't over heat more while sitting at the light, so I ruled out the water pump. It had cooled down to 192 and thought it was a fluke. Till the next hard climb and pushed it a little harder to get around a crane going very slow. It climbed back up to 226 eng and over time brought the oil to I think around 210.
My wife works 6 exits on up the interstate, so I got hers and drove on home. I work 1100PM till 1100AM and thought I would go back after late this evening.
I have a coolant filter with 150 miles on the second filter. No EGR delete and no studs.
So what are your thoughts? Where should I start? Thanks!
When I got back on the interstate I noticed the fan clutch was engaged when I pulled out from the light. So... I ruled out the fan clutch. I didn't over heat more while sitting at the light, so I ruled out the water pump. It had cooled down to 192 and thought it was a fluke. Till the next hard climb and pushed it a little harder to get around a crane going very slow. It climbed back up to 226 eng and over time brought the oil to I think around 210.
My wife works 6 exits on up the interstate, so I got hers and drove on home. I work 1100PM till 1100AM and thought I would go back after late this evening.
I have a coolant filter with 150 miles on the second filter. No EGR delete and no studs.
So what are your thoughts? Where should I start? Thanks!