Shortacus Posted June 15, 2018 Share Posted June 15, 2018 Currently rebuilding my engine - long story short previous owner singled it less than 3k ago but the block was a mess so I've got doubts about the quality of the work. Anyway... I'm currently cleaning all the parts best I can before a sonic Bath while I wait on the parts for rebuilding the block. I've came across what looks like Corrosion inside the upper sump? Anyone had any experience with this - would I be able to emery down the rough parts till smooth or would this damage the coating/metal? Cheers for any help! Quote Link to comment Share on other sites More sharing options...
Scooter Posted June 15, 2018 Share Posted June 15, 2018 The main upper sump? ie big aluminium piece? In my experience the inside of this is rough from the original casting process. If it looks like that it's not corrosion. I don't think it would do any harm to smooth it if you clean it thoroughly after but I think leaving it won't hurt either. Pics would help to clarify. Quote Link to comment Share on other sites More sharing options...
Shortacus Posted June 15, 2018 Author Share Posted June 15, 2018 Tried to attach pics from mobile but never worked for some reason. I'm starting to think my engine wasn't single turbo'd by choice and there has been significant heat and half the stock twins running through the sump at some point. Turbo does not look under 3000 miles old so kinda backs this theory up. The top layer of aluminium looks like it is starting to break up in the sump? Its the metal "ball" looking bits i'd like to smooth out and get rid of before they detach on their own when the engines back together and running - but didn't want to further break up / further damage the aluminium Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted June 15, 2018 Share Posted June 15, 2018 Thats just oil staining, not corrosion. Aluminium corrosion is like white powder Quote Link to comment Share on other sites More sharing options...
Shortacus Posted June 15, 2018 Author Share Posted June 15, 2018 I'm not worried about the colouring / staining it's the rough metal fragments that seem to be all over the aluminium. I'll just emery them as smooth as possible before sending for a clean and rebuilding. Quote Link to comment Share on other sites More sharing options...
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