Question about Ford Taurus X

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No compression in rear cylinder

No compression in any cylinder

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You are showing 2 different problems, no compression in any cylinder and no compression in rear cylinder.

Going with no compression in any cylinder, if the camshaft is not turning you should not have compression in most cylinders. If one cylinder has both valves closed you may have some cranking resistance. Your timing chain or gear is broken. Look if you can at any openings for a PVC pipe in the valve cover or oil fill cover on the valve cover.

There is a chance you can see some valve rocker arms and if they are moving when the engine is cranked. Otherwise you will need to remove a valve cover to observe the rockers.

Posted on May 13, 2014

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No compression in the first cylinder


If your so sure of no compression on #1 cylinder, lift the valve rocker cover and observe valve condition. both valves will have a very small gap tollerance under compression stroke. Because it's #1 cylinder you probably arn't looking at overheating problem. ( usually rear cylinders) Your lifting the head to be sure !

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Your Hyundai may have this kind of setup.

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1 Answer

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