Agreed, that area in the bore was glazed at the thrust point. There is nothing to change an out of round cylinder save for a full engine re-build.
Anyways, cleaning out the intake would not do much unless some sensor, vacuum line, or EGR valve is blocked right? There has to be something else to this problem since it is so common. I find it interesting to hear the same models with lower milage do not do it, but have never been able to compare like this. I have read that the rubber damper on a crankshaft pulley (absorbs torsional vibration from the crankshaft) can lose its effectiveness over time. I examined mine awhile back and it had some minor cracks in the thin rubber, but appeared just fine. Unfortunately, this would be way too expensive to just replace on an assumption. The RH engine mount (front of engine, up high on passenger wall) is the first one to wear out and can also be a source. My engine seemed to be vibrating from that area the most. Unfortunately, putting in a new mount may help damp the vibration, but not eliminate what is causing it in the first place. I doubt this helps as I have yet to figure out the cause.
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Originally Posted by silkydraws
Good deal. Egg will be down lower on the thrust side of the wall, the way the pistons rock on the rods. Back to the vibration tho I'm more cuious if cleaning out the intake does anything. I know it has nothing to do with oil consumption unless tied to an out of spec internal balance problem (worn scuffed pistons) I doubt it. maybe EGR PCV sounds more in line. But mine exhibited the same annoying front fender vibration he mentioned earlier. Like I say I wish someone would nail it down what it is because nearly every Corolla I've seen has it. True not when new but not at a particular miliage either. I put in a 60K mile engine that sounded the exact same as the 200K I pulled out. That particular car was a overheated one from a bad radiator. My nephews car never has had a problem and does it almost exactly the same. My G/Fs does it too with 116K. None of these cars burn or leak a drop of oil. I jst never pulled the intake to clean, only sprayed a can of TB cleaner through them. However if yours quits vibrating I'll gleen back through and try and figure what could be a culprit.
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