Quote:
Originally Posted by pk2
What then is the symptom of scoring? is it just a gradual loss of compression? or a catastrophic failure. Will a simple compression check Identify evidence of scoring. This motor apparently has 36k miles. At what point does scoring really become an issue.
Regards, PK
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The only symptom initially is a noise that sounds just like a bad lifter... Tick..tick..tick.
It will fool even the best pair of "mechanical ears" until the person outfitted with those ears has had it bite them in the ass after a "lifter job" was a waste of time and did not solve the problem. So, you spend 5K+ on a lifter job and the issue is not repaired, because people lack experience and ASSUME that symptoms are something they are not.
I have had these engines make the ticking sounds and never consume oil, never smoke and never lose power and even pass a compression and leak down test and have failed cylinders. It bites shops in the ass all of the time, but luckily we have been able to identify it up front in 100% of the cases.
The reason why the ticking starts first is because the wear occurs at the piston skirt area where friction is greatest. This is well blow the ring sealing area and because of that the engine can fail from this without any of the classic symptoms of a lost cylinder.