loud knocking, rebuilt think it was off timing

[canonize-ryda]

I had this problem and people said bearings but after i rebuilt my engine i noticed my pistons have 4 intake relief dents. Could my timing have been off causing the loud ticking?

thanks

 

[BogusSVO]

the 4g63 pistons have 2 reliefs for the intake valves, and 2 for the exhaust valves.

if the pistons were installed backwards, the intake valves my hit the brow of the exhaust reliefs.

Did you have the crank ground or polished at a machine shop?

 

[canonize-ryda]

No just cleaned it up with emery cloth. I rebuilt the engine with a good clean up, new bearings,new piston rings and gaskets. I haven't dropped it in yet but maybe i'm being crazy. My valves look good anyhow. Some metal flakes were in the pan though.

 

[BogusSVO]

so your had metal flake in the pan before the rebuild?

 

[canonize-ryda]

Yea just a very small amount.

 

[BogusSVO]

did you find the sorce of the flake? rod bearing? Balance shaft bearing?

 

[canonize-ryda]

Nothing major i think it could be traced to a stripped turbo oil lines. Maybe the strippings fell into the oil stream.

 

[SLIDER121]

I had a ticking sound at times and thought it was the valve lash adjusters. The car wasn't missing which was strange but ran bad. I did a compression test and had 2 bent valves on #1 cylinder and the piston was hitting the valves and slightly closing them. Check vacuum it should be 19-20in lbs if the needle wavers heavily you have a valve issue if not enough it is another mechanical issue.