It is not that easy.you may have to pull the radiator,fan, water pump,harmonic balancer,timing chain cover,remove chain,line crank and cam sprokets up. install new chain. try to start for a couple seconds before you reassemble. reverse to assemble.
I’m happy to help further over the phone at https://www.6ya.com/expert/kenneth_3efc1f8510674f04
Rather than getting into a long winded write up....just go to your local auto parts store and purchase a vehicle specific repair manual. It'll contain the specific directions you'll need to perform the job.
Its very important to make sure you get it properly timed before you re-assemble. PAY PARTICULAR ATTENTION to the section telling you how to line up the timing marks on the crankshaft gear and the camshaft gear. Also, take time to closely inspect the gear teeth for any signs of wear / damage. This is the perfect time to replace them if needed.
It's also important to make sure you've cleaned all gasket mating surfaces thoroughly so as to prevent oil leaks.
This isn't a particularly difficult job, but it can be tedious. Don't get discouraged if the first time you put the chain on the timing marks have moved and no longer lineup. Odds are the camshaft, not the crankshaft will move out of alignment.
Persevere and it'll all work out.
Good luck!
Removal & Installation
3.5L Engine
Fig. Timing belt routing and timing marks-3.5L Engine
Fig. Timing belt and related components-3.5L Engine
Fig. Adjusting the tensioner pulley-3.5L Engine
Fig. Measuring the auto tensioner rod-3.5L Engine
Kia_Sedona_2002-2006
Timing Chain, Sprockets, Front Cover & Seal
Removal & Installation
3.8L Engine
Fig. Timing chain and related components-3.8L Engine
Fig. Left timing chain markings and installation: (D) exhaust camshaft sprocket (C) intake camshaft sprocket-3.8L Engine
Fig. Right timing chain markings and installation: (C) exhaust camshaft sprocket (B) intake camshaft sprocket-3.8L Engine
Fig. Sealant application (1 inch bead width)-3.8L Engine
Fig. Timing cover sealant application-3.8L Engine
Fig. Timing cover gasket installation (A) gaskets-3.8L Engine
Fig. Timing cover bolt torque sequence and specification-3.8L Engine
Install a retaining clip on the tensioner to hold plunger IN during installation.
marking timing chain
Position the crankshaft using the special tool. Then remove the tool.
Crankshaft special tool positioning
Install the crankshaft sprocket with flange facing forward.
Crankshaft sprocket timing mark
Position the left timing chain on the camshaft sprocket. The timing mark on the camshaft sprocket must be aligned between the 2 copper (or marked) chain links.
Left camshaft sprocket timing mark
Position lower end of right (outer) timing chain on the crankshaft sprocket. Align the copper (or marked) chain link with the timing mark on the outer flange of the crankshaft pulley.
Right camshaft sprocket timing mark
Align the chalk mark on the balance shaft with the camshaft timing mark.
Balance shaft bearing caps
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