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

Do it all.

 

Yup, do it all. Ask all the questions you have. I and others will be more than happy to answer them to the best of our ability.

 

Should I loosen both cam gear sprocket or just the VVT one, Some say need to loosen both to even the chain tension, other say only the VVT

 

You truly only need to loosen the VVT bolt. The exhaust side can stay.

 

Ok thanks, just wonder the 6m bolt thread on the timing cover has a small damaged on it, I think I still can put the bolt on but not sure it’s can hold the crank pulley just to snug the crank bolt in? If not do u think I still can time the engine ?

 

Make sure you remove all specialty tools from the engine when torquing.

I might need to update OP on that. Its mainly used to keep everything aligned.

You can get a crank pulley hold tool to help hold the crank. That then becomes a two person job. Which it should be anyway.

 

Yeah if you try to torque the crank pulley bolt with that smaller alignment bolt in, you're probably going to crack your timing cover. At best.

 

Yes that exact what I have done before, tried to be smart ass thinking the 6mm will hold the pulley so I can tight the pulley bolt down, ended up damage the timing cover lol

 

Yeah don't do that

 

I read that dont touch the top of the cam follower HPFP, what happen if touched it? I think I damaged the top of cam follower last time I took it out trying to squeeze it in, now I can hear the noise like the cam hit the follower when in the cabin, should I replace it as well? thanks. The part number is L3K9-12-615

 

Meant more so prevent damage, if that's bad or gets scratched it could potentially damage the cam.

Pull the pump and follower back out and post some pictures. Maybe post a video of what you're hearing.

Hard to say exactly what is wrong without some more information.

 

Ok, Do I need to remove the pump housing to take out the cam, or just the pump itself

 

Get it to this point so you can inspect the cam through that Opening. You can also take that housing off that the HPFP mounts too to get a really good look at it.

 

Maybe I will pull the pump out then take a photo the follower, the video doesn’t justify enough the sound it make when inside the car, especially in cold weather.
Sorry if this off topic but any chance the 02 sensor can fail the wrong reading without through any code? I noticed with the obd2 tool that even when dead cold start(winter cold) the engine is still running on closed loop, just after I started the engine it’s immediately turn from open to close loop. It’s run really rough and misfire in that first 2’, after that it’s fine. Isn’t the the engine should be run on opening loop until it’s warm up?
PS: Also thank Raider for your advice, I took the valve cover off then put the engine on TDC and found out my chain will very tight, but Im doing the job anyway, I have multiple leaks on the timing cover and I think my timing is a little off

 

Have you taken any logs of this?

 

Hello people, I am new here. Got Mazda since half year only. Its CX-7 2.3T petrol + LPG installation.
I have faced problems with it almost from the beginning when I bought her.
Finally we got to do full engine repair as compression drops below acceptable level on first two cylinders, and it was choking.
When we opened an engine we found out there was quite few things needed to be fixed: scratched cylinders, scratched rings, valves & sockets burnt (because of LPG installation), engine head polished very poorly, dead turbo, almost dead oil pump...
We have repaired it all + new timing chain installed.

Since than it runs perfectly, however I am receiving an error P0012 (Valve timing adjustment – Too much delay (1st row of cylinders)
It gives me that error after couple kilometers driven after we delete it by computer. It poping up only while driving on petrol, its not showing up while driving on LPG...

What could be the cause ?
Does it matter in which position the VVT is installed ? I am pretty sure its not in the same position it was before an engine was dissasembled. Also the timing chain we have installed is not a Mazda OEM but from HEPU. I heard somwhere that this engine needs only OEM chain and with different chain it will show an error, is this true ?

 

It doesn't matter what position the vvt is in as it's oil pressure driven. This exact issue has been coming up more and more lately.

A quick Google search will show some good results and this thread is one of them. Check that out and a couple others.

https://mazdaspeeds.org/index.php?threads/p0012-camshaft-timing-overretarded.14399/

But, I would check cam position sensor and ensure it's clean or timing could be off for this to happen. Lots of variables

 

Aftermarket chain could be the cause for sure. Oem everything

 

Hello, would it be possible that engine would eventually "adapt" an aftermarket camshaft ?
P0012 error has gone itself and I haven't seen it on dashboard from last 3 days...

 

No. Not to my knowledge.