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Engine Mechanical TopicsDiscussion for motor builds, cams, head work, stripped bolts and other engine related issues. The good and the bad. If it goes round and around or up and down, post it here.
I bought my SG with about 6500 miles. Right at about 10k miles, they discovered a problem with one of the cylinder walls which required that the entire upper be replaced.
I had my 20k maintenance scheduled for Saturday, but took it in early last night because my oil light came on Sunday when I was out and around town. The light only came on when I was idling. Oil was a little low, but nothing crazy....1/2 quart. There's a high pitched tapping sound coming from the upper as well.
The bike checked out great at the 15k maintenance. At this point, there are no answers, I'm waiting to hear from the dealership. I'm hoping the oil light is a bad sensor and the tapping is a loose exhaust fitting. But...then again, hope is a fairly shitty strategy....i'm hoping this is covered by the ESP.
What does "the entire upper be replaced" mean? Do you know what the dealership did? Do you have the work order showing parts and labor? You need to know what was damaged and how the damage was repaired.
What does "the entire upper be replaced" mean? Do you know what the dealership did? Do you have the work order showing parts and labor? You need to know what was damaged and how the damage was repaired.
Per the tech at the dealership, there was a slight manufacturing imperfection in the cylinder wall which allowed for a small amount of oil to be pulled into the upper part of the engine where the rockers were. This caused irreparable damage to the various parts in the upper part of the engine. They replaced the entire top part of the engine including the pistons and cylinders. Essentially, the V part of the v-twin was replaced. Nothing in the crank case or transmission was replaced.
I'm wondering if there was a root cause to that which was not addressed.
I don't think you have the full story. The dealer replaced cylinders, pistons and cylinder heads? You should have an invoice/work order that lists all the parts that were replaced. If the work was done under warranty, the dealer should have recorded that information in the system for future reference. What ever the issue, the dealer should repair to your satisfaction under warranty.
I don't think you have the full story. The dealer replaced cylinders, pistons and cylinder heads? You should have an invoice/work order that lists all the parts that were replaced. If the work was done under warranty, the dealer should have recorded that information in the system for future reference. What ever the issue, the dealer should repair to your satisfaction under warranty.
Don't mean to cut you off but pretty hard to guess what happened to the motor from the information provided in your OP.
It would help to know what the symptoms were that generated the first repair. Additionally, it's a little hard to believe that a manufaturing defect in a cylinder didn't show up until 10K miles had been rolled up. Also the problem as described by the tech doesn't make a lot of sense either. I would have asked to see the damaged parts. True that oil can blow by rings and require boring/honing cylinders, new pistons/rings and perhaps new valves, guides and/or seals but replacing cylinders, pistons and cylinder heads is a pretty drastic measure to solve the problem as you have described.
If you can provide more information, details, etc. maybe we can provide some guidance regarding how best to manage the situation but, under the circumstances, I would suggest that you take a firm stand with the dealership that this is their problem to sort out.
Please keep us posted on your progress and good luck.
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