My timing chain is rubbing on the underside of the rocker cover in my BA Turbo. I heard a rattle so I took of the rocker cover and noticed gouging marks at the front from the chain. It's a brand new build with Atomic chain, crank sprocket and chain guides, tensioner. I checked for broken / damaged guides etc but all good, the chain is not loose so the tensioner is ok but I did also check it for tension. Just been turned a week ago but now this problem has occurred. The engine is a 2010 FG with the BA sump and dipstick mod, I do have the BA rocker cover on it though and I was thinking maybe the FG cover sits a bit higher underneath to clear the chain. Dose anyone have any ideas.

Sounds like they may have made a mistake during assembling the engine and timing chain,have you talked to Atomic about this?

I will be talking to Brad at Atomic Monday. I did a measure on a ba and fg rocker cover and found the fg is deeper at the front by 3mm, maybe I'm using the wrong cover then. I have a fg motor with ba sump and ba rocker cover so maybe ba covers don't fit fg engines for this reason.

I know for a fact that there is a difference between BA & BF sumps-FG obviously very different but I thought the rocker covers would have been the same as the dimensions of the head,cams etc.....are basically identical,hopefully you can just switch rocker cover?

Yes hoping switching the covers will fix it. I have no problems with Atomic, there work and products are second to none. Just getting the fg cover powder coat this week and I fit it with my fingers crossed