I'm building an engine from the ground up to swap into my project car. The aluminium block has been re-lined with ductile iron sleeves so the machinist sprayed them with white grease to prevent rusting.

There may be metal dust still within the galleries and the bores need to be cleaned of the honing residue and white grease.

What is the best way to prep this engine for build? I'm worried that if I don't clean it well enough, the metal particles will cause damage to the bearings when built.

1 Answer 1


Most decent machine shops have a large parts washer... best cleaning of block I know of... had several done - came back like new, but you need to oil relevant surfaces quickly.

  • Thanks for the answer. I should have mentioned that the machinist recommended the block be hand cleaned. It did go through his parts washer when I originally delivered it, but since the sleeves have been fitted and honed it was just greased and given back to me.
    – MIL-SPEC
    Jan 9, 2019 at 14:41
  • Well, having had work done like that, my friendly machine shop always ran it through again... But I also removed oilway plugs etc...
    – Solar Mike
    Jan 9, 2019 at 14:51
  • OK, I will see if he can run it through the washer again when its build time - thanks :)
    – MIL-SPEC
    Jan 9, 2019 at 15:07
  • Always liked building a spotlessly clean block..
    – Solar Mike
    Jan 9, 2019 at 15:33
  • 1
    What a parts washer won't do is chase all the oil lines/galleries in the block and crank. That is usually done by hand with a bottle brush of some sort. YMMV
    – Tim Nevins
    Jan 9, 2019 at 20:30

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