DescriptionThis video provides step-by-step repair instructions for replacing the timing cam (or timing gear) on a Honda small engine. The most common reasons for replacing the timing cam are when the engine runs poorly or won’t start.
All of the information for this timing cam replacement video is applicable to the following brands:
Honda
Tools needed: 10mm socket and socket wrench, flat head screwdriver, 13/16 spark plug wrench, safety razor, torque wrench, Hondabond, feeler gauge
Step-By-Step Instructions1
Before you replace the timing cam first make sure the engine has cooled.
2
Next, you should remove the wire and boot from the spark plug to prevent the engine from accidentally starting.
3
Now tip the engine back to a ninety degree angle.
4
Use a 10mm socket to remove the bolts securing the valve cover.
5
Pry the cover off – be prepared for some oil to spill.
6
Use a socket or a spark plug wrench to help remove the spark plug.
7
Confirm that the piston is in the “up” position and that the rocker arms are loose.
8
Now use a flathead screwdriver to slide the belt off of the timing cam.
9
Push out the retaining pin securing the timing command remove the old cam.
10
Install the new timing cam by inserting it into the valve opening then secure it with the pin.
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Make sure the alignment marks on the new timing cam are aligned with the front edge of the valve opening.
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With the cam aligned, loop the belt onto the cam.
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Replace the spark plug.
14
Be careful not to over tighten the plug.
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Use a razor to scrape off the old sealer from the valve cover and cylinder head.
16
Clean the sealing surface and apply new sealant to the valve cover.
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Now align the cover on the cylinder head and thread the bolts loosely.
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Tighten the bolts in an alternating pattern and torque them to manufacturer’s specifications.
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Return the engine to a level position.
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You’re now ready to reattach the wire and boot to the spark plug and confirm that the engine runs properly.