Quote:
Originally Posted by davestlouis
My 86 420SEL has 189xxx miles, the engine was an LKQ unit put in at about 120xxx, and had new timing chain at that time. I noticed a ticking several months ago, hat turned out to be the A/C compressor. I just run the climate control in ECON mode now so the compressor doesn't run, so that tick is gone until summer.
Now for my new problem...over the past week a ticking noise went from non-existent to noticeable at idle, to noticeable up to about 25 MPH...then tire noise covers it up. It appears to be coming from the right side of the engine, but I can't pinpoint its source. The car runs fine, good oil pressure, temp is normal. I'm due for an oil change, so hopefully stray parts of the car won't fall out with the oil, but what are the potential things to look for, and how do I go about diganosing this?
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If you have someone who can idle up the car while you are looking at the engine, use a long piece of hose(old garden hose works for me) and place one end at your ear while the other end is placed at the area of the engine you think the ticking is coming from. If nothing else, you may determine which cylinder or part of the exhaust is causing the ticking.
I too have a ticking at the right front cylinder area. Right now I am using 15w 50 Mobil 1. It's been about 7,000 miles and the ticking has quieted down some. Someone told me it could be nailing. Perhaps an injector is failing. Plan on replacing all of them on my next vacation. My SEC is at 240,000. It's been a great daily driver so far. Good luck to you.
