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I have 230k on my 03 fx45 and the top end tank on my radiator started leaking. I was able to get the old radiator out but having trouble getting the new denso unit in. Can anyone tell me (or have pics) of the how the lower bushing sits in the support? i cant tell if the bushing rides on top of the support hole of if I need to press it in so the groove in the bushing is in the support hole. Heres a pic of the bushing for reference
 

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I figured out it doesnt act like a grommet, it just rests in there lower mount holes. My issue is the denso unit i have doesnt fit! When the lower part of the radiator is mounted, the upper doesn't line up. Not sure if this is a denso issue or if some early fx45s were different?
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I ordered a new radiator and it fit like a glove. The issue just turned out that the old unit didnt fit.

All in all, the procedure was pretty easy. The biggest hassle was a cold garage in 0deg Chicago temps! Here are the steps to replace the radiator.

1. Remove belly pan. Most of my 10mm were rusted and gone so I couldnt tell you how many are there but there are videos on the internet for this. Heres a reference video : https://d2n97g4vasjwsk.cloudfront.net/2004 Infiniti FX45 4.5L V8/Oil Drain Plug - Part 1 - 480p.mp4

2. Drain coolant. On the bottom end tank near the lower radiator hose connection, there is a drain plug with a plastic phillips screw. Unscrew that and the coolant will come out of that hole. Heres a video for reference: https://d2n97g4vasjwsk.cloudfront.n... 3.5L V6/Radiator Coolant - Part 2 - 480p.mp4

3. Once all drained (pull off the radiator cap also), disconnect the lower and upper radiator hoses.

4. Remove trans cooler lines (I previously installed a dedicated trans cooler to prevent getting the strawberry milkshake so I skipped this step). There are two lines at the bottom of the radiator.. take them off and plug them up.

5. Remove snorkel and airbox. Heres a video from the internet : https://d2n97g4vasjwsk.cloudfront.n...4.5L V8/Air Filter Engine - Part 1 - 480p.mp4

6. Remove fan shroud. This part is two pieces. On the bottom half, there are two clips on each side (red). Squeeze them and pop them out towards the engine. The lower shroud can be now removed from the bottom of the car. The upper shroud is held onto the radiator by two screws at the top (yellow) and slides into 2 grooves at the bottom (green). This can be lifted out of the car from the top.
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7. The radiator is the only thing left, unlock the clips holding the top mounting points by spinning them. When they are lined up, pull them up and out. The radiator is completely free now. Tilt the top back towards the engine and pull it up and out of the car. In my case, it was hard to pull up. I went under the car and pried it out of the bottom mounting holes to make it easier to remove.

8. Pull the upper and lower rubber bushings off the old radiator and use them for the new one. Follow this in reverse order and youre all done. Add coolant, burp and go.
 
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