SR20 Rebuild: how are these bores?? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

RalliartRsX · 01-21-2017, 02:35 PM

Well, I finally had a chance to tear ton a short block that previous owner clamed had no low compression. As seen, the cross hatch is very visible, but there seems to be some cylinder/bore "wiping" as well as heat marks at the very top of the bore.

I know its fairly diffult to judge just based off pics, but if the bores are still uniform top - bottom, can this be bored over 0.5mm/0.020 and be fine, or do you think a bigger overbore would be required??

Cylinder 4

Cylinder 1

Cylinder 2

Cylinder 3

01-21-2017, 02:35 PM	#1
RalliartRsX Post Whore! Join Date: Apr 2006 Location: Maryland Posts: 4,793 Trader Rating: (32) Feedback Score: 32 reviews	SR20 Rebuild: how are these bores?? Well, I finally had a chance to tear ton a short block that previous owner clamed had no low compression. As seen, the cross hatch is very visible, but there seems to be some cylinder/bore "wiping" as well as heat marks at the very top of the bore. I know its fairly diffult to judge just based off pics, but if the bores are still uniform top - bottom, can this be bored over 0.5mm/0.020 and be fine, or do you think a bigger overbore would be required?? Cylinder 4 Cylinder 1 Cylinder 2 Cylinder 3

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