Honda Civic (2001 - 2005) Coupe / Sedan / Hybrid (Includes Acura EL)

D17A1 ring end gap question?

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Old Jun 14, 2021 | 08:56 AM
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Default D17A1 ring end gap question?

New member here, been a long time reader. Love this forum and the wealth of knowledge you guys have shared. Thanks for having me!
I have a 2005 civic which I am doing a stock rebuild on due to oil consumption. At this point the block is prepped and nearly ready to be put back together however I have one concern. My piston ring end gaps are as follows:
-Top (.014")
-Second (.019")
-Oil (.018" - .019")

The honda manual states the following:
Standard or New , Service Limit
-Top 0.15-0.30 mm (0.006-0.012 in.) , 0.60 mm (0.024 in.)
-Second 0.30-0.45 mm (0.012-0.018 in.) , 0.60 mm (0.024 in.)
-Oil 0.20-0.80 mm (0.008-0.031 in.) , 0.90 mm (0.035 in.)

As you can see, the top and second compression ring end gaps fall slightly outside of the "Standard or New" spec, however the oil rings are well within spec. I am concerned that the compression rings will allow for some excessive blowby leading to issues such as oil consumption 50k miles downs the road but then again the oil control ring gaps are good to go. What do you all think? I am considering getting the bores oversized .020" and starting fresh but those numbers above aren't crazy far out of spec so might not be necessary. Any experienced opinion will help. Thank you
Disclaimer: I'm pretty dang ocd about maintenance and want a trouble free ride for the next several years of grad school. All measurements have been taken by the book
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