Ticking fuel injector or lifter plunger causing ticking
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I recently acquired a mazda b2600i and I fixed a leaky valve cover on it. It ran get for about 2 months and then I noticed I needed to do an oil change bad, so the plunger may have been clogged during this period. I put 10w-40 synthetic in it, then about 2 weeks later it starts to tick from the around the valve cover. I got a stethoscope and put it on the fuel injectors and cylinders #1 and #3 injectors sound like they're ticking. But it doesn't run bad so that's why I believe its the lifter/s. It has 208k miles and my friend has the same model that lasted for 325k before it needed any major work.
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