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- Central Virginia
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- 2019 CX-5 Reserve
Thanks for posting all of those info for cylinder deactivation, Mulligan! Like Luke_M6, I need some time to absorb all of these. (confused)
The more I know, the less I understand.
Thanks for posting all of those info for cylinder deactivation, Mulligan! Like Luke_M6, I need some time to absorb all of these. (confused)
The old style captured the rockers with a rod going through them. Now most ohc engines have free floating rocker arms like in this older video at the 8:35 mark. It is not a new invention by Mazda.
https://www.youtube.com/watch?v=fjmplL0Sfac#t=515
"It sounds confusing at first, and unfortunately the complications accumulate as you dive deeper "
Also, some OHC engines have the cam directly on top of the values with hydraulic lifter in between. No rocker arms required.The old style captured the rockers with a rod going through them. Now most ohc engines have free floating rocker arms like in this older video at the 8:35 mark. It is not a new invention by Mazda.
https://www.youtube.com/watch?v=fjmplL0Sfac#t=515
I reread a Road & Track article on the Skyactiv-X engine the other day. My head's still humming from that one.
The Skyactiv-X engine looks intriguing, indeed. I read this Car & Driver article that gave an early review of it:
https://www.caranddriver.com/review...n-ignition-gas-engine-prototype-drive-review/
The article mentions knocking noises from the engine, though. Could that be an annoying issue - or something Mazda will hopefully fix by launch? Per the article:
*However, it is audible, thanks to copious knock (detonation) that hangs around any time the engine isn*t fully in a single ignition setting. During clean transitions from spark to compression ignition or back, the X emits its stuttered knocking soundtrack for about a second or two. However, whenever the computers move close to one ignition state from the other, the knocking drags on.*
..I need to drive more miles to draw any conclusions.
This or something similar should be included by Mazda for rocker arm falling recall.I just viewed an engine tear down video that showed a small spring clip that holds the rocker to the lifter. Stated that there is no chance of rocker falling off. ED
Now the most important thing for me is to find a simple way to check the valves without removing the cover.
It can be checked with a camera, tomorrow I will have a camera on a rigid cable because a flexible endoscope is a bad choice.
I safely presume that Mazda Corp. knows / remedies this eventual problem better than some of the authors here?
My 2.5 L FW was upgraded, free of charge >2 months ago, (may, 2019)just before undertaking a long trip within Europe (some 2.000 km).
Engine runs fine! (with CD.....)
And yes, I am one of those concerned by the TSB (VIN nr affected).
I do hope that this issue is not a storm in a glass of water.