I know there was a bad run of soft cams on the J35, and some kind of Honda recall, warranty or service program for that... but IIRC it was well before 2009. Might want to double check that.Front Cylinder Head was removed due to a broken spark plug on #4. The owner tried to remove the broken plug, but broke the ez-out. Prior to this incident, the front bank had an audible knock/tick.
After disassembly, two scored cam lobes were found on #5. All of the rollers on the rocker were in perfect shape, so maybe we caught it just in time?
Service intervals were “annually” with Amsoil Signature Series 5W-20 and Amsoil filter. Since this was a 2009 Pilot with 180K, I would estimate the annual interval to be around 15K. Driving conditions were a mix of city and highway.
Note: this is a J35Z4 with VCM.
Looks like a material issue - that is not scoring it is spalling. If on the Intake, It could be due to the lost motion springs being weak and the roller not following the cam causing hammering. If the surface hardness/toughness is shallow, its like hammering on thin ice. You can also get roller skating with certain oils - but that would evidence as light scoring if anything.Front Cylinder Head was removed due to a broken spark plug on #4. The owner tried to remove the broken plug, but broke the ez-out. Prior to this incident, the front bank had an audible knock/tick.
After disassembly, two scored cam lobes were found on #5. All of the rollers on the rocker were in perfect shape, so maybe we caught it just in time?
Service intervals were “annually” with Amsoil Signature Series 5W-20 and Amsoil filter. Since this was a 2009 Pilot with 180K, I would estimate the annual interval to be around 15K. Driving conditions were a mix of city and highway.
Note: this is a J35Z4 with VCM.
Hey that's on topic!Totally off topic but I've broken the ceramic on plugs but how do you break the 13/16 hex body?
I don't actually believe this. There is NO WAY this was just Amsoil Signature Series and only 15K/yearly changes. Now it is possible they skipped a year or they drove a heck of a lot more than "15K" in a year the last few years. Amsoil Sig does not "chunk" like that in 15K. Sorry no offense to you Mike, and I know VCM is hard on oil, but did you collect an oil sample? I am guessing it was a different oil changed in perhaps.
For a short timne, we had a Honda VCM engine. I just disabled the VCM with the VCMuzzler. We got rid of that car for other reasons than the VCM engine.I had a 2010 Pilot sold it to CarMax at 30k, the VCM took the shine off a otherwise nice car, resale at that time was eye popping high, easiest car sale I ever did.
Nope. Not with hard crusty carbon. No way.Pablo IMO you can believe this! The first time I posted the mess under the covers of one of these engines and the full synthetic OCI people were calling me out with comments like that is not possible, the guy lied to you. Fact is it was my brothers and I did or was with him every OC so I know what went in and how long it was in there. I have seen more than a dozen like this and worse and know their history.
5K in these is a long OCI 10K is asking for trouble 15K forget it, it is having deposit/varnish issues at a min.
I agree, in certain applications bad things can happen if you push even the best of oils too far.Pablo IMO you can believe this! The first time I posted the mess under the covers of one of these engines and the full synthetic OCI people were calling me out with comments like that is not possible, the guy lied to you. Fact is it was my brothers and I did or was with him every OC so I know what went in and how long it was in there. I have seen more than a dozen like this and worse and know their history.
5K in these is a long OCI 10K is asking for trouble 15K forget it, it is having deposit/varnish issues at a min.
I can't quote just the first picture, but zoom in on the tip of the cam lobe. This is not a lubricant, OCI issue. Most likely a metallurgy issue.SEE FIRST PICTURE IN SERIES
Oil grade has NOTHING to do with this. Its a material and/or design issue. And a 20 will give better cooling.obviously the w20 couldn't protect, a w40 may have eliminated or at least minimized this failure.
That was the first thing to catch my eye. It reminded me of the mess I had in my 2000 Century that my father gave me.SS 5/20 awfully varnished this engine