How to See Timing Marks on a 4.0 V6 Ford Explorer

by Chris Phillips

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The Ford Explorer was first produced in 1991, and it is still in production today. The timing is a big source of difficulties because there is nothing about it that can be adjusted by the owner. The Powertrain Control Module sets and keeps the ignition timing. If there is a timing issue, it should be adjusted by trained professionals. However the timing can be checked by the owner.

Step 1

Park the vehicle on a smooth, dry and level surface with adequate lighting inside the engine compartment. Engage the parking brake. Block at least two wheels with front and back blocks. Raise the hood of the engine compartment.

Step 2

Look at the front of the engine facing from the grill. Locate the timing case cover directly in the center of the engine's face. It should appear as an off-center elliptical smooth metal piece. The timing marker is on the upper left side of the cover. It is an arrow-shaped piece of metal. The crankshaft pulley has two marks on it. These must be aligned with the timing marker when checking the ignition timing.

Step 3

Checking the timing chain or the timing chain tensioner requires removing several other pieces, but when it is removed there are timing marks on the crankshaft sprocket and the camshaft sprocket that must be aligned for proper operation. Facing the front of the engine, the camshaft sprocket timing mark should be on the bottom of the sprocket and the top of the crankshaft sprocket.

Step 4

Remove any debris and dirt visible in the engine compartment. Close the hood, firmly latching it shut. Unblock the wheels. Disengage the parking brake. Start the engine and listen for any new sounds or problem indicators.

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