Mazda CX9 Owners and Likers Thread

[Motortrend]

Taken from carguide:
https://www.************/2018/04/rev...sport.html?m=1

"Apparently, the CX-9’s engine components are susceptible to heat soak, especially when driven at high speeds for an extended period of time (in this case, a steady 100-110 km/h for about 4 hours). Whether its due to the high ambient temperature or not, what matters is that the engine temperature rose steadily, resting at about three-quarters to red (110 degrees Celsius according to the gauge cluster)."

Could it be that its a just a matter of a shitty engine design? Guess I wouldn't be buying a Mazda with turbo now.

Edit: Crap the link won't work. Oh well. It's from carguide's CX9 review dated 2018.

I think it is because of carguide.

[jojopad]

Taken from carguide:
https://www.************/2018/04/rev...sport.html?m=1

"Apparently, the CX-9’s engine components are susceptible to heat soak, especially when driven at high speeds for an extended period of time (in this case, a steady 100-110 km/h for about 4 hours). Whether its due to the high ambient temperature or not, what matters is that the engine temperature rose steadily, resting at about three-quarters to red (110 degrees Celsius according to the gauge cluster)."

Could it be that its a just a matter of a shitty engine design? Guess I wouldn't be buying a Mazda with turbo now.

Edit: Crap the link won't work. Oh well. It's from carguide's CX9 review dated 2018.

I'll fix the link obfuscation for you:

https://www-carguide-ph/2018/04/revi...awd-sport.html

(copy the link, replace - from www-carguide-ph with .)

Let's quote the complete paragraph:

Having said that, not everything is rosy with Mazda’s first modern forced-induction motor. And for that, it’s time to go back to the opening paragraph. Apparently, the CX-9’s engine components are susceptible to heat soak, especially when driven at high speeds for an extended period of time (in this case, a steady 100-110 km/h for about 4 hours). Whether its due to the high ambient temperature or not, what matters is that the engine temperature rose steadily, resting at about three-quarters to red (110 degrees Celsius according to the gauge cluster). At this time, any jab of the throttle won’t produce any kick from the turbo. Instead, it’ll behave pretty much like a normally-aspirated engine lugging a 1,908-kilogram body. Additionally, fuel economy could be better. Despite all the hype surrounding this Dynamic Pressure Turbo, fuel economy in city traffic is stuck at 5.21 km/L improving to just 11.65 km/L during highway driving.

Looks like a specific issue with the CX9 only, not all Mazda Skyactiv engine models. And doesn't seem a likely culprit for an engine fire.

Could it be the CX9 Skyactiv model is still using the Ford PTU design? I can only speculate.

[hardwang]

I'll fix the link obfuscation for you:

https://www-carguide-ph/2018/04/revi...awd-sport.html

(copy the link, replace - from www-carguide-ph with .)

Let's quote the complete paragraph:



Looks like a specific issue with the CX9 only, not all Mazda Skyactiv engine models. And doesn't seem a likely culprit for an engine fire.

Could it be the CX9 Skyactiv model is still using the Ford PTU design? I can only speculate.

Same engine is used in the CX5 turbo and the phased out Mazda 6 Turbo. Dunno if there are reports of overheating in FB groups.

Highly doubt Ford is involved this time. They've long broken up. I believe the engineering from the ground up is pure Mazda.

[LOLZ]

Same engine is used in the CX5 turbo and the phased out Mazda 6 Turbo. Dunno if there are reports of overheating in FB groups.

Highly doubt Ford is involved this time. They've long broken up. I believe the engineering from the ground up is pure Mazda.

The drivetrain is shared with the CX-5 mostly as-is.
Mazda CX-9 - SAVAGEGEESE | TECHNICAL MISHAPS

I believe the CX-9 is the debut platform for the 2.5T and there were reports of cracking cylinder heads and coolant loss(also affected the 6 and CX-5) purportedly addressed in 2021 with a revised cylinder head.

2.5T Engine Coolant Leaking TSB | Mazdas247

There was also Oil consumption issues mostly with 2021 USA MY models due to defective valve stem seals.

Mazda 2.5 Turbo Valve Stem Seal information| Grassroots Motorsports forum |