how much is too much metal in the oil filter?
Posted April 24, 2003 - 06:21 AM
I just changed the oil and man was there a lot more metal debris in the oil filter than ever before. It was definately excessive, because it took quite a few wipes with a shop towel to clean out the oil filter cavity. The first couple of wipes were enough to cover the surface area of my index finger.
I consulted a friend who's first thought was check the clutch for signs of wear on the plates and inner/outer basket. I haven't opened it up yet, but I did check the metal shavings with a magnet and they are definately not aluminum.
I took some photos and put them up on my website. Here is the link.
photos of the shop towels
What do you guys think? Are these signs of potential engine failure? Crank? Any ideas?
I'm trying to be proactive and avoid a major failure, so I'll probably have the motor checked out just to be safe.
Posted April 24, 2003 - 06:59 AM
Posted April 24, 2003 - 07:02 AM
My friend had the same, sudden increase in the amount of metal shaving just before her crank broke.
Posted April 24, 2003 - 08:32 AM
Posted April 24, 2003 - 01:18 PM
Posted April 24, 2003 - 01:34 PM
I could scream it until it breaks, but what will that get me?
It costs a lot less to replace worn parts than it does to replace all the parts that get damaged during engine failure.
I've decided I'm not going to take any chances. I'm going to have the motor disassembled and inspected as soon as possible. I'm not riding it again until I can be certain there isn't an underlying issue.
I'll do my best to take more pics and report back on what we discover.
Posted April 24, 2003 - 08:24 PM
BTW you can open the filter only without changing the oil and expect after every ride. I guess it is from the trany if you do not hear some strange sounds from the engine.
Posted April 25, 2003 - 06:55 AM
Posted April 25, 2003 - 02:22 PM
So if it were my bike it would seem normal to me.
The only issue of concern is the relative increase in trapped material in the filter. Use a magnet to determine if they are flakes of Al or steel. The material trapped in my filter is Al, presumably from the clutch. Monitor closely any changes in trapped material over time.
Posted April 26, 2003 - 12:25 PM
So far, it looks like I wasn't wrong. There is about 0.5 mm of vertical free play in the con rod around the crank -- not good. There is also a nick in the cylinder wall about 1 mm wide and 6-7 mm long that pentrates the cylinder lining completely -- aparently some of the shavings got between the piston and the cylinder wall.
The top end looked good with no obvious signs of abnormal wear on the cams or shim buckets. There is actually minimal carbon build up on the vavle seats as well.
My buddy is going to split the cases and inspect for further damage, but doesn't expect to find anything significant.
I'm going to take advantage of the opportunity and go with a 262cc overbore (I think it is 80 mm bigger than stock), and hopefully an aftermarket con rod, and crank replacement.
I'm going to do my best to get photos of the damaged parts, but I don't have a digital camera at my disposal.
I'll update this post with more info when it becomes available.
It didn't really take much to tear the motor down enough to check the cylinder, piston, valves and free play in the con rod. I'd recommend it if you think you might have an issue.
I'm pretty sure that if I had just kept running the bike I'd be looking at a complete engine failure some time in the near future -- which is very costly as we all know.
Posted July 17, 2003 - 06:47 AM