To solve the Indiana Jones cogwheel puzzles as part of the Blessed Pearl quest, you must add cogs to two gear trains that can open a hidden gate. The puzzle is complicated by the gears and cogs scattered all around, and you have to precisely place them to get everything moving, though it's not always clear. Especially since you don't have enough cogs to fix both sides at once, so you need to fix one and then cannibalise it for parts to repair the other.
Where to find all the Khmer cogs for the gate puzzle in Indiana Jones
There are four Khmer cogwheels in the main chamber to use - two small and two large. There's also another small cog behind the Left Gear Train on a small ledge I've highlighted above. You should find it when you investigate the need for water as it's on the platform you need to reach to whip yank the pipe open to start the water flow.
That gives you a grand total of three small cogs and two large ones for this Indiana Jones and the Great Circle conundrum.
Just remember to get the water flowing over the wheel behind the Left Gear Train or you won't be able solve that puzzle when the time comes.
Indiana Jones Khmer cogwheel puzzle right gear train
Above is the solution for the Right Gear Chain in Indiana Jones. You need all three small cogs and one large one to connect the central cog to the one on the right. When you have it all placed correctly, pulling the lever will make the two monster statues drop into the floor. Once that's happened the puzzle is solved and you can take the cogs off to use on the left hand side.
Indiana Jones Khmer cogwheel puzzle left gear train
This is the solution for the Left Gear Train in Indiana Jones. You'll need all the cogs you've found - two large and three small - to complete this one and connect the central cog with the destination cog on the left hand side. Again, when you get it right the two monster statues will sink into the floor to let you know it has been completed. If you haven't done the right hand side at this point you can now strip the cogs to use them there.
How to open the hidden gate in Indiana Jones
Once both the gear trains have been solved and the cog mechanisms have done their job all that's left to do it turn the wheel that is highlighted. That will open the hidden gate, letting Indy and Gina carry on and see what's on the other side.
If you're looking for more to play once Indy's done then check out the best new games right now.
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