Radiator or Water Pump Issue??

RedWings44 · Sep 11, 2023

BLtheP said: ↑

We need more information. Where is the gauge starting at when you crank it up after sitting 4 hours? What does "less than a min reaches half instantly" mean? That's contradictory. Is the needle shooting straight to half instantly, or is it taking a good portion of the minute? Instant would mean the needle is going straight to half immediately.

You're in Florida, it's hot. Driving in that climate will warm up an engine very quickly. Engine off for 4 hours likely will not cool down to anywhere close to cool (less than 100 degrees). The gauge reaches "half" (warmed up) by around 165-170 degrees, which is not fully warmed up despite the gauge being at it's normal zone. So reaching half quickly is not as quick as it seems, because you're still not at 190-200 like a fully warmed up truck is.

Give us more info about the situation to alleviate concerns. Also, some guys are in here talking about idling to warm up, yeah that takes a while. That is not the same situation as driving, which in a warm climate can warm the engine up in no time.

At this point my vote is that you have no problems.
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Yes and no. Not necessarily an issue, but not typical behavior. OPs photo shows it is 85°F out. Even in the 90°F+ heatwave we had here (high humidity as well) my truck did not heat up as fast as OP is claiming. It was certainly faster than normal, but not that quickly.

OPTIMUS_TACO · Sep 11, 2023

fourfourone said: ↑

I really find it hard to believe that 5 other Toyotas had an issue when you drove them. I've never heard of a 4-runner having a no power issue to the point where it was scarry to drive.
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Dang you caught me yup came on here to be a troll have nothing better to do with my time I see someone has trust issues

ixnay · Oct 13, 2023

Over the last 2 days, I noticed the same problem in my 2021 O/R TRD, 29K miles. At 6 am this morning, with an outside temp in the low 50s, I left my house. I drove 2 minutes at 20 mph and noticed the temp needle straight up, dead center, on the temp gauge. 90 minutes later, I returned home. Total drive distance was 5 miles. After I got home, I checked the coolant. It was at the low level.

The engine has never warmed up this quickly over the last 2 years.

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Radiator or Water Pump Issue??

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Radiator or Water Pump Issue??

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