Coolant Temp Help

[Cueyo]

You could buy a CVT cooler, but from your posts I don't think you have high temps and everything is in the normal range.

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[NewCivicRs]

You could buy a CVT cooler, but from your posts I don't think you have high temps and everything is in the normal range.

After an hour of spirited driving on canyon hill with high boost mode, if I dont pull over, the CVT temp will continue to increase to 118 C and possibly 120 C up but I never try it and pull over right away to have some rest.
How high is too high or 120 C is fine?

Btw thanks for your insight.

 

[chopsuey34]

OP, you're overthinking everything. Listen to J_D:

https://www.civicxi.com/forum/threads/chopsuey’s-2025-civic-si-build-thread.61779/post-1009383

 

[NewCivicRs]

OP, you're overthinking everything. Listen to J_D:

https://www.civicxi.com/forum/threads/chopsuey’s-2025-civic-si-build-thread.61779/post-1009383

Yes I can move on from engine oil issue. so the CVT temp is fine?

 

[Cueyo]

No your CVT is going to blow up tomorrow 🫣

 

[NewCivicRs]

No your CVT is going to blow up tomorrow 🫣

You wanna see when it's blowing up? I'll take pictures I was having fun meanwhile my 235/40/18 Michelin PS5 front tires keep spinning when I take over cars in front.

 

[NewCivicRs]

No your CVT is going to blow up tomorrow 🫣

But seriously, could it handle 150 C? Because I am tired of pulling over everytime I see temp reaches 115 C

 

[chopsuey34]

Yes a hatch L15B7 CVT with TSP Stage 1 Non Si tune.
3 inch catless downpipe
3 inch frontpipe
HKS exhaust
Intercooler upgrade
93 octane.
No track purpose, only spirited driving + normal driving around city with tropical and humid ambient 32C.
Since car brand new until now I am using Amsoil SS 0W20 but now I am concerned about it although everything is normal.

Based on your use case, you shouldn't even be looking at engine or CVT temps because your aren't going to run the car hot enough. I recommend hiding any temperature sensor read out in your KTuner because they will only make you unnecessarily worried. This is a Honda, not some rocket ship.

Brake launching your CVT will cause way more damage than operating temperatures during normal operation. Go read the Tuned Reliability threads here and on CivicX.

 

[Cueyo]

Based on your use case, you shouldn't even be looking at engine or CVT temps because your aren't going to run the car hot enough. I recommend hiding any temperature sensor read out in your KTuner because they will only make you unnecessarily worried. This is a Honda, not some rocket ship.

Brake launching your CVT will cause way more damage than operating temperatures during normal operation. Go read the Tuned Reliability threads here and on CivicX.

I remember a post on the 11th gen forum from a guy who said that shifting from one gear to another (on an auto) too rapidly did more damage than anything else. Can't find his post, but it was a pretty convincing one.

If it helps at all OP, I had a 2.0NA sport with a CVT that was tuned to around ~186whp and I never had slippage or problems. The sport CVTs aren't even rated for more than ~200whp, so the fact I got that close and never had problems should be reassurance. The 1.5T CVT is rated at ~260whp, but people have pushed them well into the 300s with mixed results.

Temp is the least of your worries, just don't brake launch like @chopsuey34 said, and don't treat the transmission like a slide puzzle.

 

[NewCivicRs]

I remember a post on the 11th gen forum from a guy who said that shifting from one gear to another (on an auto) too rapidly did more damage than anything else. Can't find his post, but it was a pretty convincing one.

If it helps at all OP, I had a 2.0NA sport with a CVT that was tuned to around ~186whp and I never had slippage or problems. The sport CVTs aren't even rated for more than ~200whp, so the fact I got that close and never had problems should be reassurance. The 1.5T CVT is rated at ~260whp, but people have pushed them well into the 300s with mixed results.

Temp is the least of your worries, just don't brake launch like @chopsuey34 said, and don't treat the transmission like a slide puzzle.

Could you explain about shifting too rapidly?

 

[Cueyo]

Could you explain about shifting too rapidly?

Like reversing, then while the car is still rolling, going into drive. And yes, the temp is fine, you would know immediately if the CVT is being damaged or not performing properly.

 

[NewCivicRs]

Like reversing, then while the car is still rolling, going into drive. And yes, the temp is fine, you would know immediately if the CVT is being damaged or not performing properly.

I see, I never do that nor brake launching. I just do a precautionary. If I notice my CVT is not performing properly, it was too late, isn't it?

 

[NewCivicRs]

Based on your use case, you shouldn't even be looking at engine or CVT temps because your aren't going to run the car hot enough. I recommend hiding any temperature sensor read out in your KTuner because they will only make you unnecessarily worried. This is a Honda, not some rocket ship.

Brake launching your CVT will cause way more damage than operating temperatures during normal operation. Go read the Tuned Reliability threads here and on CivicX.

So do you think in my case (CVT temp over 115 C / 240 F on mountain road) is fine and no need to worry? Not hot enough?

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