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2013 ford escape Valve bucket size (tappet)

645 Views 6 Replies 3 Participants Last post by  Lawrenc
Hello this is my first post. The vehicle I have is a 2013 ford escape 1.6L Eco-boost. I took off the tappets (BM5Z-6500-DAAA) on the cylinder head to remove a valve. they got mixed up, and I don't know what tappet goes to what valve. The inside of each tappet has a measurement engraved. it's a 16-valve engine so it has 16 tappets. 2 tappets have a measurement of 3.175. 4 tappets are measured at 3.125. 1 tappet has a 3.075. and another single tappet is measured at 3.200. the last 8 tappets are measured at 3.150 but I believe these all go to the exhaust valves. to simplify my question, which measured tappet goes inside the right valve hole. I have done a lot of research and have found in a YouTube video, this was a problem with this specific year which was addressed later to be one measurement. I used my college resources, and I purchased a Haynes book, sadly it did not specify. I don't know how to contact an engineer at Ford, I feel like they are the only one that would know. I cannot find this information anywhere so i thought i could reach out to the community for help. I really don't want to ruin my vehicle. if you have any information regarding where they go or where I could find this information. I would be most grateful. here are some pics to help illustrate what i mean by measurements you have to zoom in. sorry.


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I think you have a fundamental misunderstanding about this operation.

Every time the valve train is dismantled, the valve clearance must be set on reassembly. This is because the valve seats ( and other components in the train) will wear with use, and to allow for varying tolerance in the manufacture of the components.

In older engines with rocker arms, there was a screw adjust on the rocker arm. In Dual Overhead Cam designs ( as we are faced with in this example) buckets of various base thickness are used, or shims are placed in the bucket to make it the correct thickness to result in the proper clearance to the cam lob bearing surface.

The clearance is adjusted by replacing the over or under measured bucket with buckets that fit better or adding/removing shims until the correct clearance is achieved.

In the case before us, the fact that 8 of 16 buckets were the same size does not mean that they were all for exhaust valves. If the smallest bucket is still to thick for your tall exhaust valve, you might need to buy a thinner bucket, or it's possible that the valve is tuliped ( this refers to the outer edge of the valve bending down), the valve is worn excessively at the seating edge, or worst case scenario, the valve seat in the head has worn beyond tolerance.

If you removed the valves from the head, you might might be able to swap that tall exhaust valve for the shortest exhaust valve, and be able to achieve the correct tolerance.
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