Motor Vehicle Maintenance & Repair Asked on September 25, 2021
It’s an aluminum block and there are some high spots of white powdery corrosion.
I was able to gently scrape most off using a (dull) metal paint scraper and a green scour pad, but there are some stubborn spots remaining.
Also I vacuumed out any fine particles from the scour pad that landed in the ports, but if I missed any that “may” have gotten deeper inside is that cause for worry?
The best or accepted way was to run the manifold face on emery cloth which was on a flat plate or surface plate.
This would gradually reduce the high points.
If the amount needed was significant then a machine shop could machine it.
Answered by Solar Mike on September 25, 2021
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