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Originally Posted by mnturbo
Do any of you with actual experience with ls1's know of any high mileage related problems?
Would I be safe going with a car that has over 100K Miles.
I am not afraid of doing any work to the vehicle. Most of the vehicles I have owned have had over 100k miles on them when I bought them. My GSX indluded.
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I've never seen an LS1 with any sort of serious cylinder wall wear. Something to look out for though, the oil pump bypasses will stick if you get any trash in them. If it sticks, say goodbye to oil pressure and you're bearings too. Clean fresh oil is a must. Just like any car with 100,000 miles though, if you keep it maintained well, mileage isn't a huge issue. I hear lots of LS1's with noisy valvetrains, with stock and aftermarket cams. That can be solved, but it doesn't threaten the life of the shortblock, just false knock/timing issues. Don't get me wrong, DSM's are ok, always broken, but ok. Something that a DSM can never do....HUGE BURNOUTS! Oh how I love huge burnouts.