KennethS
TJ Expert
All systems should have more cooling capacity than needed. If you have a thermostat, the coolant should stay at nominal operating temperature.
Denso radiator marginal in hotter climates?
- Thread starter adventureboss
- Start date
All systems should have more cooling capacity than needed. If you have a thermostat, the coolant should stay at nominal operating temperature.
So just to update, I replaced the Denso a couple days ago and went back to a CSF 3244. Temps are normal again. It was 100 degrees out and I was pushing 90 mph into a headwind on the interstate with the A/C maxed out. Stayed at 205-210. In the same conditions I was at 239-243 with the Denso. Pretty big difference. Looking back at my notes the last time I dealt with this, it was exactly the same situation. Oh and the AC works a lot better now.
A few things I noticed this time. When comparing the Denso and the CSF, the quality control of the Denso does seem a little better so maybe it'll last longer, but I guess it doesn't matter if its inadequate. Plus the CSF lasted me 130k miles last time. Will it this time? I don't know, I guess we'll see.
The fan clutch is a lot more willing to engage with the CSF too. I'm not sure why, maybe it's because this radiator is rejecting more heat and the fan clutch is sensing it better? Anyways, so now when I downshift when going uphill, the coolant temp actually drops a couple degrees and doesn't start to creep up on those inclines, even with my pedal to the floor in fourth gear. I'm assuming its the fan spinning faster at higher rpm and cooling things down. With the Denso, it would start creeping up and I'd have to turn the AC off.
The CSF still does start to creep to the right for me when I'm sitting and idling with the A/C on in this heat, but not nearly to the level that the Denso would and no where near overheat, so I'm okay with it. Unfortunately, I've never had a properly functioning mopar radiator ever in this Jeep, so I don't know how much better they are if at all, but I'm happy with the CSF especially considering the price. Hope this helps someone! I would've driven myself absolutely nuts if I didn't consider the radiator could be an issue.
A few things I noticed this time. When comparing the Denso and the CSF, the quality control of the Denso does seem a little better so maybe it'll last longer, but I guess it doesn't matter if its inadequate. Plus the CSF lasted me 130k miles last time. Will it this time? I don't know, I guess we'll see.
The fan clutch is a lot more willing to engage with the CSF too. I'm not sure why, maybe it's because this radiator is rejecting more heat and the fan clutch is sensing it better? Anyways, so now when I downshift when going uphill, the coolant temp actually drops a couple degrees and doesn't start to creep up on those inclines, even with my pedal to the floor in fourth gear. I'm assuming its the fan spinning faster at higher rpm and cooling things down. With the Denso, it would start creeping up and I'd have to turn the AC off.
The CSF still does start to creep to the right for me when I'm sitting and idling with the A/C on in this heat, but not nearly to the level that the Denso would and no where near overheat, so I'm okay with it. Unfortunately, I've never had a properly functioning mopar radiator ever in this Jeep, so I don't know how much better they are if at all, but I'm happy with the CSF especially considering the price. Hope this helps someone! I would've driven myself absolutely nuts if I didn't consider the radiator could be an issue.
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