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We’d hope the oil seepage or leak isn’t from the expensive OCV itself. But unfortunately that’s a wishful thinking based on many reports. The leak isn’t from the OCV seal / gasket / grommet, but from wire harness pins inside the OCV connector. The OCV seepage / leak would affect the exhaust...

Yep, this’s a known issue and the leak is coming from the VVT solenoid / oil control valve (OCV), part no. PE01-14-420A, which is operated by PCM and controls the hydraulic oil passages to the hydraulic variable valve timing actuator for variable exhaust valve timing. Unfortunately you have to...

Yes, cylinder head cracking is also happening after Mazda modified the 2.5L NA head for cylinder deactivation. The crack area is different from the 2.5T, and oil leak instead of coolant leak is the symptom. 2.5 NA Cracked Cylinder Head with Oil leaking...How common is this?

Nobody can guarantee, not even Mazda itself, the thin 2mm wall on the cylinder head of the 2.5L NA with cylinder deactivation can hold the stress without cracking for the life of the engine. It could crack the next 1,000 miles, it could last another 105,000 miles. It’s the unknown factor...

My point is, back in 2018 when I was planning to get a new 2018 CX-5 and immediately dropped the plan once I learned Mazda had added cylinder deactivation to a reliable 2.5L NA, why Mazda spent that much effort and money to a feature which is historically having the bad reputation of failure...

When Mazda added cylinder deactivation to the 2.5L NA in MY 2018 CX-5, the “coolant control valve” was introduced to replace the traditional thermostat. I thought it was an electrical thermostat like Toyota uses on its Dynamic Force 2.0L/2.5L NA. Turned out It still uses a traditional...

2016 CX-5 is a totally different vehicle from the 2018. The 2016 doesn’t have cylinder deactivation and the 2018 has it which is inherent many potential major problems on engine (cylinder head cracking) and transmission (torque converter failure).

The idea of installing a second external ATF filter on our SkyActiv-Drive automatic transmission isn’t possible as there’s no external ATF lines available to hook up. Yes we can find a third party ATF cooler adapter to get ATF circulating access, but that seems to be only a temporary solution...

Keep in mind the automatic transmission for the 2.5L with CD is different from the one used on the 2.5L without CD. Here is the latest TSB about torque converter failure on CD equipped automatic transaxle: TSB No.: 05-005/23 Chirp Noise from Automatic Transaxle on 3-4 Upshift “DESCRIPTION...

Here is the ATF filter cartridge / strainer for Mazda’s SkyActiv-Drive automatic transmission showed in Mazda’s Workshop Manual: It’s not a fine mesh screen.

These specs listed in the manual are TOTAL capacity for each transmission. You won’t be able to drain all ATF out from an automatic transmission as almost a half of it is resided in the torque converter、oil passage、and differential chamber which can’t be drained out from pan plug. And Mazda...

This could be the very cold atmosphere temperature when you did the ATF drain-&-fill?

7 liters??? If your dealer did the drain-and-fill for you they’ve made some money from you by exaggerating the ATF amount! You need less than 5 liters even if the dealer dropped the pan to replace the filter cartridge. No it’s a filter cartridge / strainer there, not a fine screen. Cut...

Forum member @FerrariF1 originally thought his ATF level from factory was fine while checking the ATF level without engine running on his CX-5 2.5T. Once he rechecked with engine idling, he needed about 600ml (0.635 quart!!!) to bring the ATF level to the Full mark (although the ideal level...