Thread: Cam timing
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Old 03-31-2021, 10:21 AM   #2
Homeoboxter
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Join Date: Oct 2018
Location: North Cali
Posts: 745
Garage
Hmm.. Sounds pretty crazy. Are you referring to the sprocket or to the plate that provides the signal for the camshaft position sensor? As far as I remember the sprocket is manufactured together with the camshaft as one piece, so it`s hard to believe it can spin on the shaft. The plate looks like being pressed on, but that just spins freely in front of the sensor and I don`t see what could force it to slip on the shaft. It`s also hard to believe that they can`t check that without pulling the engine. If you remove the green plug, the sensor and the scavanging oil pump you should be able to see pretty well if anything has slipped, especially with a borescope. They could also pull the spark plug and with a borescope check when the valves start opening and refer that to the crankshaft position to get an idea if anything is misaligned. I have heard of the IMS sprocket to spin on the IMS but then nothing would line up at TDC...
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