Here's the deal. 2001 D2 has been running nice and cool since I replaced the tstat and fan clutch. A few weeks ago while on a wheeling tripI noticed my temps get to 208. Which it NEVER does! It was a hot day and I was playing on a rock garden.
The temps eventually went back down so I didn't think much of it. Then on the 100 mile ride home, I once again noticed it was running warmer ( 195-199) when it usually runs 188.
That was a few weeks ago, Drove the truck again today around town and noticed its still running 10 or so degrees warmer than Im used to.
It seems to mostly be while under load. Highway speeds, or AC on, or heavy wheeling.. etc. At lower speeds just cruising, ( less load) its close to normal, although a tad warmer.
The radiator was replaced about 7yrs ago
The tstat is a LR original 180 installed around the same time.
Fan clutch is about 3yrs old
No coolant leaks.
Water pump is not original, but I have no idea when it was last replaced. Probably close to 15yrs ago..
Is it same to say these symptoms sound like a failing water pump? Its the only part of the cooling system that hasn't been replaced somewhat recently.
I know the truck is not running hot, but its definitely hotter than its run previously in the same conditions.
I should add that at idle it sits at 197-199 and it takes it a while to get up to those temps.
The temps eventually went back down so I didn't think much of it. Then on the 100 mile ride home, I once again noticed it was running warmer ( 195-199) when it usually runs 188.
That was a few weeks ago, Drove the truck again today around town and noticed its still running 10 or so degrees warmer than Im used to.
It seems to mostly be while under load. Highway speeds, or AC on, or heavy wheeling.. etc. At lower speeds just cruising, ( less load) its close to normal, although a tad warmer.
The radiator was replaced about 7yrs ago
The tstat is a LR original 180 installed around the same time.
Fan clutch is about 3yrs old
No coolant leaks.
Water pump is not original, but I have no idea when it was last replaced. Probably close to 15yrs ago..
Is it same to say these symptoms sound like a failing water pump? Its the only part of the cooling system that hasn't been replaced somewhat recently.
I know the truck is not running hot, but its definitely hotter than its run previously in the same conditions.
I should add that at idle it sits at 197-199 and it takes it a while to get up to those temps.
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