Cleaning an engine in situ - Alfa Romeo Forum
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Cleaning an engine in situ

Under the bonnet of my 156 the engine is pretty manky. Being a V6 there are no plastic covers and the alloy has become quite oxidized.

I obviously don't expect concours finsihing but it would be nice for it to look clean.

what would you recommend to remove the rough oxidization? I was thinking of pinching the other half's home steam cleaner.
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the only thing to do is use elbow grease.... i would spray the engine bay with anything water based, endless amounts of trouble could follow that
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I've used 'Solvol Autosol' on my cam covers on previous engines cos they were flat - ish - lifts the oxidisation - the other option is to use a spray alloy wheel cleaner - they are easily cleaned off with a pressure washer, but you may need to disconnect an cover the injector connectors - MAF - Cam - and any other sensors in the way.

either that or go for it and then clean all connectors with water dispersant before starting.

good luck!!
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Hard work for oxidised ally. I use a piece of scotch bright tied to a pencil for nooks and crannies. For oil removal I use brake cleaner bought in 5 lt cans sprayed through a paraffin wash gun in short bursts. Be aware of it's flammability and take necessary care with regard to H&S. ie Mask and goggles!
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