Turning a honda crankshaft = bad???
10-26-2005, 12:45 PM
#1
1.0 BAR
Thread Starter
Join Date: Mar 2005
Posts: 302
Turning a honda crankshaft = bad???
I had my crank turned because I thought that it would be a good idea to ensure a good bearing surfaces in my built DOHC ZC. I mentioned something to this extent on dseries and a couple of guys basically said that there is some special OEM finish to honda crankshafts and that having them turned is a bad idea. Does anyone have any info about this?
It would seem to me that if there was some special finish to OEM honda cranks that it would eventually wear off.
It would seem to me that if there was some special finish to OEM honda cranks that it would eventually wear off.
10-26-2005, 02:50 PM
#2
1.5 BAR
Join Date: Sep 2004
Posts: 1,460
Re: Turning a honda crankshaft = bad???
having the crank turned and ordering oversided bearings is standard machining practice if the journals on the crank are grooved or worn too badly for you to be able to just polish them. if you didnt run the engine without oil pressure, you could have just micro polished the journals and ordered stock size bearings. i think the "special finish" is just the polishing that is done to every crank. ---- d series.org
10-27-2005, 01:22 AM
#6
0.0 BAR
Join Date: Jan 2005
Posts: 0
Re: Turning a honda crankshaft = bad???
.010" undersize turning is VERY common, on V8's.........rarely heard of it being done on Honda's since the cranks are very tough. I was told if you ---- up the crank in a Honda, better off finding a new one.
Either after turning they are not as good, or the OS bearings are junk.
Either after turning they are not as good, or the OS bearings are junk.
10-27-2005, 01:40 AM
#7
0.5 BAR
Join Date: Jul 2005
Posts: 148
Re: Turning a honda crankshaft = bad???
.01 just seems like too much. considering that the bearing tolerance is like .0015. i dont think even the thickest honda bearing will correct a .0115 tolerance. or are the OS bearings you are talking about not honda?
