Rb25det Neo Vct Knocking

[mrstageaman]

Ive just got a 25det neo running in my stagea, but theres a knocking coming from the intake cam when the vct solenoid isn't open. When its idling up until about 1400rpm you can hear the knocking but when the vct opens, above 1400rpm, the knocking goes away and sounds mint, ive tried replacing the solenoid with another one but to no avail anyone had this before?

[WMDC35]

Could be something to do with the cambelt.

[Mrstagman]

I was thinking it maybe a touch too tight, but i asked a few mechanic mates and theyr pretty sure its not cambelt, but i might pull the cover off and check the tension

[89CAL]

Is the cam timing right?

[Mrstagman]

The timing is right, runs and accelerates perfectly

[Ben C34]

I would be betting it's the actuator. Cash money.

[Mrstagman]

The vct solenoid actuator? Ive changed that to another one from the old engine out of the car and does exactly the same thing? Or do they usually shit them self if they're sitting for a while

[Ben C34]

Not the solenoid.

The cam gear.

[Mrstagman]

What needs to be repaired or replaced in there? Is it easier to get another cam?

[iruvyouskyrine]

No because the cam and the cam gear are different. Shouldn't be hard to find a can hear by itself, probably looking at $100ish for a second hand one.

[iruvyouskyrine]

Cam gear*

[Mrstagman]

Ok sweet as cheers guys

[Mrstagman]

So i changed the cam gear with one of a 25de neo, and i noticed that the cam gear was bolted up differently to the original one, the de one was bolted central to the vct and the det was bolted hard one way. I ran it how it was set and was lacking alot of top end and didnt keep pulling at all after 5000rpm, so i moved it the same way hard as the original one and still is lacking top end and it feels like its surging when you put your foot on it? Is it too advanced? Could the cas need adjusting?

[Dose Pipe Sutututu]

not sure if related, but when I did my timing kit and removed the VCT solenoid to take the seals off, I over tightened the VCT using a rattle gun (being lazy of course). Some how I jammed the unit and the car was sluggish down below...

Make sure it's sitting in the right position before torquing it up to spec.

[Ben C34]

Man, I meant the whole vct unit along with cam gear.

I thought it was kind of obvious.

Changing just the actual gear part is a bit pointless, it's the actual vct actuator part of the car gear assembly that needs to be changed.

[Ben C34]

And seeing as you are removing the cas each time you do stuff, yes, the cas needs to be set correctly with a timing light each time.

[Mrstagman]

I changed the whole unit, not just the outside gear, the knocking has stopped, reading up it sounds like timing, a mechanic mate is bringing his scanner over later and will plug it in, to make sure the timings right

[Mrstagman]

Do you know if de's and det's are set to the same cam lift degree from zero from factory, or is the det set a degree or 2 more for more topend as they have a turbo for the majority of the middle?

[Mrstagman]

If that makes sense

[Mrstagman]

Got a timing light and it was quiet retarded, fixed that and goes alot harder, just need to know if de's and det vct cams are set to the same degree from zero or different now