A 1994 Yamaha Kodiak 400 all-terrain vehicle uses an internal element-style oil filter to prevent debris from contaminating its oil supply. It's behind a small cover on the left side of the engine's crankcase. Although this type of oil filter is capable of performing its job well, removing and replacing an internal element filter involves bit more more work than with a spin-on oil filter. Partial disassembly of the Kodiak's foot controls is required.
Things You'll Need
- 12 mm and 22 mm sockets
- Socket wrench
- 10 mm combination wrench
- Drain pan
- Torque wrench
- Flexible funnel
- 5 mm Allen wrench
- Adapter plate O-rings
- SAE 10W30 SE-type motor oil, 2.4 quarts
- Shop towel
Park your Kodiak 400 on a level work area, then let it idle in place for three minutes until its oil supply has warmed thoroughly. Stop the engine and let the ATV cool for at least 10 minutes.
Remove the left foot-peg bracket from your Kodiak 400's frame to access to the oil filter cover on the left side of the engine. Unscrew both of the bracket mounting bolts with a 12 mm socket and a socket wrench, then pull the bracket away from the ATV. Loosen the pinch bolt at the base of the shift lever with a 10 mm combination wrench. Pull the shift lever off of the shifter shaft by hand.
Remove the oil cap from the right side of the engine. Place a drain pan directly below the oil drain plug on the bottom of the engine's crankcase. Unscrew the drain plug with a 22 mm socket and a socket wrench, then allow the oil to drain. Screw the drain plug back into place with your 22 mm socket, then tighten the drain plug to 17 foot-pounds with a torque wrench.
Place a flexible funnel directly below the oil filter cover, and direct the end of the funnel into your drain pan. Unscrew the bolts from the top and bottom of the oil filter cover with a 5 mm Allen wrench, then pull the cover partially away from the engine. Allow any remaining oil to drain into your funnel. Pull the cover off of the engine and move it to the side, taking care not to kink the oil hoses attached to the side of the cover.
Grasp the adapter plate, which was previously hidden behind the oil filter cover, and pull it off of the engine. The oil filter element may be attached to the adapter or still be mounted to the motor's oil pump. Pull the filter element out of either part by hand and discard it. Remove the sealing O-rings from both sides of the adapter and replace them with new O-rings.
Place a new oil filter element into the engine, then place the adapter plate over the filter. Place the oil filter cover over the adapter plate, facing the cover's oil hoses toward the front of the ATV. Screw the cover bolts into place with a 5 mm Allen wrench, then tighten the bolts to 7.2 foot-pounds with a torque wrench.
Place a funnel into the oil filler neck on the right side of the engine. Pour 2.4 quarts of SAE 10W30 SE-type motor oil into the engine. Remove the funnel and wipe away any spilled oil with a shop towel. Screw the oil cap onto the filler neck by hand.
Start the Kodiak 400's engine and let it idle for 3 minutes. Watch for oil leaks at the oil drain plug and the oil filter cover. If a leak appears at either point, tighten the drain plug or the cover's bolts an additional quarter turn. Stop the engine after three minutes.
Tips & Warnings
- Fill your Kodiak 400's engine with SAE 5W30 SE-type motor oil if you are operating the ATV in near or sub-zero temperatures.
- "Yamaha YFM400FWF Service Manual"; Yamaha Motor Corp.;1994
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