Can a camshaft pulley fall off while driving?
The camshaft pulley and bolt is the only thing that holds, the timing belt pulley in place and I was extremely lucky it didn’t fall off while I continued driving. At home, I inspected the pulley, there is a notch in the pulley that has taken a slight beating, and the splines on the pulley look worn.
Can a bad pulley cause a bad crankshaft?
Since you’re doing this much work, it would be a shame if bad pulleys are the root cause and you re-use them. Once you have the new belt on, rotate the crankshaft twice by hand (with a wrench, of course) and re-check that the timing marks on the camshafts line up properly when the crankshaft is back to TDC. (Remember, twice around).
Can a camshaft be turned without a belt?
However, both camshafts need to be lined up with the timing marks as well as the crankshaft turned to TDC before you install the belt to keep everything lined up correctly. My belt guide also shows this not to be an interference engine, so the cam shafts and crankshafts can be turned independently without causing damage.
Why did the pulley come off my Honda engine?
Secondly this gen Honda engine spins anticlockwise – if the bolt is loose it will work itself loose. The only way to tighten this bolt is to make a tool with a huge nut – something like 50 mm – it should perfectly engage the pulley hex cut that is cast into it.
However, both camshafts need to be lined up with the timing marks as well as the crankshaft turned to TDC before you install the belt to keep everything lined up correctly. My belt guide also shows this not to be an interference engine, so the cam shafts and crankshafts can be turned independently without causing damage.
Since you’re doing this much work, it would be a shame if bad pulleys are the root cause and you re-use them. Once you have the new belt on, rotate the crankshaft twice by hand (with a wrench, of course) and re-check that the timing marks on the camshafts line up properly when the crankshaft is back to TDC. (Remember, twice around).
When to set the cams on a crankshaft?
I would suggest at this point in time that you start with the crankshaft at 30° before top dead center and set the cams. At this point, there will be plenty of clearance for valve in every cylinder. When the cams are in position, then rotate the crankshaft to TDC and install the belt.
What happens when the cams are in the correct position?
Hopefully, when the cams are in the correct position, there will be no spring pressure on the cams…If the cams want to turn, you will have to hold them in position (a helper) while you slip the belt on… The pressure confuses me a little, but then I really don’t know how the whole engine works.