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How can you tell if a engine is blown on a 1985 Lincoln Mark 7 if you hear a loud tapping coming from the right side of the engine?
Wiki User
∙ 17y ago
General engine health can be determined by testing compression, oil pressure and blowby. The noise you describe can be caused by several things. Check the "temerature riser", a valve that allows exhaust gasses to cross over the intake manifold to pre-heat a cold engine. Also check the EGR valve. If it's leaking it can sometimes make a sound that might be interpreted as tapping. It could also be a collapsed lifter. That often occurs if the oil hasn't been kept clean. There are a few engine cleaning products that help occasionally, but don't count on it. You might also want to check your exhaust manifold and gasket. If the gasket is blown, or if the manifold is cracked, it can also make that loud tapping sound.
Wiki User
∙ 17y ago
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