Vy knocking/tinny sound

[Tay212]

Hey guys so let’s start of by saying yep I know I’m a dip ****! Was flogging the **** out of the pride and joy and then bang literally. Lost power and loud as knocking/tinny sound coming from the top of the engine only gets louder the more you put your foot down. What have I done? iCloud link to video of the noise https://share.icloud.com/photos/0nmZfZPi1ajU82ujtTt88jVKQ

 

[Trevor loves holden.]

If an engine goes overspeed, commonly called "over-revving", damage to the piston and valvetrain may occur when a valve stays open longer than usual. Valve float can possibly result in loss of compression, misfire, or a valve and piston colliding with each other.

 

[Immortality]

WOW, that's a helpful post, where did you copy that from? These days, engines have rev limiters to prevent this this occurrence.

 

[Trevor loves holden.]

WOW, that's a helpful post, where did you copy that from? These days, engines have rev limiters to prevent this this occurrence.

Well that's helpful this vehicle seemed to overrev hence the reason why the valves are now farked.

 

[Immortality]

That's an assumption on your part

 

[Trevor loves holden.]

That's an assumption on your part

Well what do you think then? Not timing chain or it be running rough, leaves valve springs and rockers tapping away.

 

[Immortality]

If a valve had hit a piston chances are it would have a miss at idle due to the valve not sealing properly. I'd be looking at a failed lash adjustor for starters going by the tick. Rockers covers off should reveal what is going on.

 

[Immortality]

****, for some reason I was thinking alloytec. VY is ecotec, I'd still be looking at the lifter but take the rocker covers off and look for a loose lifter/push rod etc.