Replace piston rings to fix AP1 oil consumption?
06-19-2018, 08:58 AM
#12
I actually took Honda up on it with a motor that was drinking 1Q every 800 miles. They tore down the motor and found what looked like some kind of casting cracks in the cylinder bores and chalked it up as manufacturing flaws so they replaced the short block under the extended Honda care warrantee I had at the time.
Last edited by s2000Junky; 06-19-2018 at 09:01 AM.
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klapamos (08-16-2020)
06-19-2018, 11:37 AM
#13
06-20-2018, 04:05 PM
#15
When I built my F24 in my garage I took a complete long block down to every component and re-ringed the pistons that went into the same bore they had always been in. When I measured ring gaps in 3 places along the cylinder I had some taper but all I did was use a Wiseco nylon hone to prep the bores and used the 06+ piston rings. Car had no smoke/oil consumption problems up for 2 seasons until the point I went from 5 to 2nd at 100 mph at T1 in Sebring 
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Slowcrash_101 (06-20-2018)
06-21-2018, 07:51 AM
#16
When I built my F24 in my garage I took a complete long block down to every component and re-ringed the pistons that went into the same bore they had always been in. When I measured ring gaps in 3 places along the cylinder I had some taper but all I did was use a Wiseco nylon hone to prep the bores and used the 06+ piston rings. Car had no smoke/oil consumption problems up for 2 seasons until the point I went from 5 to 2nd at 100 mph at T1 in Sebring
06-21-2018, 03:56 PM
#17
1400 rpm drill, 10 passes per bore. used ATF fluid, dosed the hone every 5 passes
my numbers sheet
https://www.s2ki.com/forums/automoti.../#post23886766
my worst bore taper was 0.015 inch at the bottom to 0.011 inch at the top
my numbers sheet
https://www.s2ki.com/forums/automoti.../#post23886766
my worst bore taper was 0.015 inch at the bottom to 0.011 inch at the top
Last edited by s2000ellier; 06-21-2018 at 04:49 PM.
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fatjoe10 (06-22-2018)
06-29-2020, 02:43 AM
#20
My recent F24 build burns zero oil on unprepped cylinder walls and NPR chrome faced piston rings with good compression on PZX pistons. The repair manual doesn't ask you to rehone unless there are scratches or damage. I would re-ring that engine and hopefully the out-of-round condition isn't severe enough to negate the benefits of re-ringing.