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Freshly rebuilt RB25DET Neo Ticking

LjB123

By LjB123,
in Engines & Forced Induction

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LjB123

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Freshly rebuilt RB25DET Neo, all done by the one shop except for the machining, so the reassembly/rebuild, bed in on the dyno, and final tune. So far have done just under 1000kms since getting it back, and then this tick started happening.

Was a bit quieter the other day when it started, took it to the shop to have a look, was told it was likely the VCT gear had shit itself because of where the tick was situated, and to take it home, i drove home cautiously and havent driven it since, but started it up today and it was suddenly louder and more rattly. The shop is taking it back later this week to see what the go is, has anyone else had a ticking like this? Sounds like its in the head, the spun bearing it had before getting rebuilt was a deeper knock and definitely down in the bottom if the engine, different to this, its alot higher pitched 

Thanks in advance people!

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https://www.sau.com.au/forums/topic/485906-freshly-rebuilt-rb25det-neo-ticking/
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LjB123 Enthusiast

LjB123

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25 minutes ago, GTSBoy said:

Sounds like VCT actuator.

As in the solenoid? I disconnected it and still makes the noise unfortunately. The solenoid works as it should, unplugged and when 12v is applied it clicks open and closed

LjB123 Enthusiast

LjB123

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6 hours ago, GTSBoy said:

No, the solenoid is not the actuator. The actuator is on the cam gear, to make it actually move when given oil pressure by the solenoid.

Ah ok so best bet is replace the cam gear? I do have a spare low km engine with one on it. Will try replacing it with that

LjB123 Enthusiast

LjB123

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3 minutes ago, GTSBoy said:

The actuator is not the cam gear. It is attached to the cam gear. But if you wanted to swap over the whole cam gear, then that would (should, depending on the health of the spare) work too.

Ah understood. I cant find anywhere that sells just the actuator, just the whole unit itself with the gear unfortunately. Not cheap either

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