okay so can someone please check my estimates / calculations regarding the file fit ring gaps - I will revise them once I have a squaring tool but just am a tiny unsure of the maths?
I have used what I presume is a "fast road turbo engine setup"
TOP - .0050" x bore
2ND - .0055" x bore
OIL - as delivered?
cylinder bore is 3.18 inch
piston is 3.16 inch
TOP - .0050 x 3.18 = 0.0159
2ND - .0055 x 3.18 = 0.0175
so essentially 0.0159 and 0.0175 - inches?
converted to mm for my feeler gauge? (goes down to 0.05mm)
TOP = (0.0159 * 25.4) = 0.40386mm - so 0.40mm
2ND = (0.0175 * 25.4) = 0.4445mm - so 0.45mm
on a test ring (without using a squaring tool) the gap was 0.35mm so if that was the real case I would need to remove 0.05mm.
Do I need to measure each cylinder bore 1-4 and recalculate or would any difference be insignificant, I realise I need to "file fit" each ring into the cylinders 1-4 to ensure I obtain the exact gaps.
it's such a tiny variance - it feels like I am wrong?
Also is it essential or just good practice to check the ring gap at both the bottom and top of the cylinder, and I assume adjust the gap to the smallest reading?
if it is literally one twentieth of a mm can I just use a small file or do I still need to use a electric grinder or similar?
Thanks for any advise