How to align the timing marks on the Jiangling Shunda timing belt?

[DelJoel]

Align the crankshaft mark to the 12 o'clock position and match it with the mark on the timing seat. There is a positioning hole on the camshaft, which can be fixed by screwing in an 8mm bolt. After installation, rotate the crankshaft two turns and check if the timing marks are correctly aligned.

[MacAlexandra]

I've done this a few times, and changing the timing belt on a JMC Shunda requires extra care. First, you need to remove the engine cover and belt guard, then rotate the crankshaft to the top dead center position of the first cylinder. There's a small triangular mark on the crankshaft pulley that must align with the notch mark on the engine block. The camshaft side requires even more attention—there's a notch on the camshaft timing gear that must perfectly match the groove on the cylinder head. If the marks aren’t aligned properly during installation, it’s guaranteed to cause valve collision, which would mean a major engine overhaul. Another critical point is adjusting the belt tension correctly—it’s best to measure it with a professional tensioning tool. After finishing, don’t rush to reinstall the covers; first, turn the crankshaft a couple of times with a wrench to confirm all marks remain aligned before reassembling.