How To: Mazdaspeed 3/Mazdaspeed 6/CX-7 VVT The Roku Way

For anyone that has done this recently, soon to be myself on my '08 MS3 with 200k miles, did you replace the water and/or oil pumps as a while-you're-in-there proactive replacement? I'd like to confirm part numbers for them if you've replaced them before ordering.

Are there any other parts that aren't directly related to VVT that should be replaced at this mileage while the valve and timing covers are out of the way?

I tried searching for known issues with water and oil pumps at or approaching 200k miles but I didn't really find anything definitive.
 
To my knowledge, I don't know of water pumps failing it's a pretty basic part, but not going.to hurt anything either if you do.

The oil pump, I've only seen replaced if you can't find missing pieces off the vvt or during a full rebuild, even not everyonw replaces the oil pump. Considering your milage, that is also not a bad idea. They just aren't really known for failing unless something causes their failure.
 
Do you really think that the position of the VVT on the shaft does not matter? I reassembled a new one without paying attention but I have problems with engine combustion and I wonder if it comes from there.
 
Grondin Giovanni said:
Do you really think that the position of the VVT on the shaft does not matter? I reassembled a new one without paying attention but I have problems with engine combustion and I wonder if it comes from there.
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It doesn’t matter, what codes or combustion problems are you having?
 
No code but kr on high regimes from 4000tr. my mapeur (recognized on the disi) can not understand where it can come from and I explore all the tracks since I have to go up everything myself
 
When I look at the design of the VVT and the head of the camshaft in the area where the VVT fits together, I feel like there are two or three holes on one side and the other that should line up for the passage of oil, right?
 

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The holes inside the vvt line up with the slot in the camshaft. It does not matter how it lines up.
 
VVT on the DISI-MZR is uni-directional. This means it needs only one passage for oil to flow into the VVT sprocket itself; as long as the solenoid has at least 3 oil passages, this can operate similar to a 3 port EBCS, but instead of a WGA, it's a VVT sprocket and instead of air, it uses oil.
 
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