Date registered: Mar 2005
Vehicle: '01-E320 & 02-ST2
Location: John 15:18-19
Mentioned: 0 Post(s)
Quoted: 35 Post(s)
Hi, Dmfb and welcome to the forum.
The first question I'd have for your mechanic is "Did you perform a compression test on the engine?"
If his answer is no, I'd find a new mechanic, period.
If he did one, ask him what he found and how he performed the test. Typically when you find a low cylinder you also squirt some oil into the cylinder to see if that restores a good part of the compression. If so, it's probably rings, if not, probably valves. If the latter, a valve job -- much less expensive than a rebuild -- would typically restore the car's performance.
You don't mention mileage or how well maintained your car has been, but if it's up in miles or hasn't been well maintained then I'd not be surprised if you have some significant wear; typically you'd see it throughout the engine, though, and not just confined to one cylinder when it's truly a wear condition.
At the least I'd put in a new spark plug (one range hotter for the time being, it will help burn the oil off the plug) and take it for a second or third opinion.
Post back up when you know more...
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