Piston

[canalcat]

Got my jug off (for new gaskets) How do I get the black buildup off of my piston head and head of cylinder? The for help

 

[Deleted member 12676]

scrape it off with a knife, then polish it with sandpaper

 

[canalcat]

scrape it off with a knife, then polish it with sandpaper

The Jag hope I get it back together!! I took Notes

 

[Deleted member 12676]

unless it is real thick it is best to leave it in place.
it serves as a slight thermal barrier which prevents as much heat loss to the piston and head. people pay good money to have their piston and head ceramic coated.
(I guess I should clarify by saying that heat loss equates to power loss)

 

[butre]

I leave it alone unless I can determine that its causing hot spots

 

[HeadSmess]

i run it lean enough that i dont get any deposits other than a slight tan/grey film...


use a copper scraper is the standard practise, so you dont scratch the alloy.

bit of oven cleaner/caustic helps but note that it does attack alloy. just brush it on, leave it a few minutes and quickly wash it off again.

 

[butre]

I don't bother jetting until after I break it in, and sometimes I'll leave it alone for a few more days after that.

 

[45u]

I bead blast mine then polish.