Well I bet no one ever thought of that being the root cause for the zoom zoom boom boom.
How could a car company stuff up something so simple.
Might expand on this after a bit of reading around and putting some other know issues with the DISI MZR motor together.
This is how it all pins together for me:
1. That link shows oil hydrolock as the root of the Mazda explosion.
a) There is a known issue with the MZR engine suddenly losing large quantities of oil (I had this issue with my SP23)
b) The MZR engine uses a pcv (positive crank venting) system. This means that with increased boost you could be overpressurizing your sump blowing oil into your pistons not to mention the increased pressure against your turbo seals.
2. There is also a history of oil build up in the DISI MZR intake manifold.
a) There was a comment by MPS2NV the other week in relation to build up of crud on the MAF sensors where he talked about another sensor in the intake manifold that was covered in oil.
b) In the link above it talked about oil residue in large quantities throughout the intake and even in the cylinders of a motor that bent rods but didnt punch the block.
c) Apparently the DISI motor, unlike PFI motors, does not clean oil out of intake system due to its direct injecting nature.
3. Comment is made about cruise control and certain RPM ranges leading to oil build up in the intake.
a) Speculation has raged about the role cruise has played in a number of grenade incidents. Finally there is an explanation of sorts about why it may be a contributing factor.
4. This performance shop makes mention on their site about the turbo seal issue on the Gen 1.
a) The MZR motor uses a pcv system which creates a vacuum to draw oil back into sump when the engine is off throttle, apparently vacuum is not really achieved so the system is flawed to begin with.
b) There is suggestion about pressure variance between sump pressure and downpipe pressure causing the turbo seal failures. I am less certain about this since some people have not changed to aftermarket downpipes and still had turbo seal failures.
Put some thought into these suppositions and let me know what you all think.
Do these guys sound like they have found the real cause?
Have a look at these links on their website and tell me if the possible problems they list hold water:
PT-Performance.com
PT-Performance.com
PT-Performance.com
And this one from the post above:
Why the Mazdaspeed3/6 engine blow up... - B15U.com
This could be a real solution as far as I am concerned and I am very interested in anyones thoughts on this