To shave or not to shave the block ?

[ADEN]

Thank you all but where i live no eta no nothing the e30 is facing extention lol.
about boring to 84mm i heard that the b20 block will face a huge reduction in its life if done and i couldn't find...

[ADEN]

I am doing a rebuild to my poor m20b20 and getting new pistons and rings and head refresh , will i benefit from shaving the block to raise cr or just leave it stock?

[ADEN]

Expansion valve rarely fail in E30s mine worked after 10 years of no A/C lol.
As @roguetoster mentions clean evaporator and condenser from outside using compressed air and from inside with a special...

[ADEN]

If you are using oem piston and oem rings, Ring ends gaps are ok. My concern is piston grooves if they are too much out of clearance they do this.

[ADEN]

Sometimes my car cranks well when battery voltage is 11.5v maybe he need to load test the battery ,sometime 12.5v battery gets down to 8v while cranking....

[ADEN]

This is a possibility but i will try not to by welding the part near the bushing first and cool it quick then weld the other end.
A question: Do you think the welding part need to be bend a little...