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There's an oring behind that bolt. theres oil in there fot the vct to work.

Check it out and replace it.

I cant see hiw overfilling it would damge it, how much overfill are we talking?

So its a pretty serious build? Omly reason I ask is I can see a bolt blocking off a small coolant line in the photo ;)

I doubt the leak has anything to with revs or overfill. Its just a leak.

no seal between the bolt and the cam. Should have the bolt with a washer behind it. Then a spring and plate with o-ring on top of the bolt. Ive had that one off quite a few times when building my engine

Id expect a little bit of leakage past the bolt but nothing major. How come the cover is off?

The neo engine has a different vct setup that uses an oring behind a bolt to seal, which is what I was thinking of.

Pre neo is different as 89cal pointed out 2and the image I posted shows that.

You are missing the cover and the seal.

wait you're missing the cover, spring, seal and those 4x 6/8mm?mm bolts

that's why it looks funny, also if that's the case how does your VCT function properly? I'm sure that spring in there to shift the cam sprocket

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