Leaky fuel tank

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Old Aug 3, 2025 | 06:02 AM
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Jwrigh32's Avatar
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Leaky fuel tank

Good morning everyone. I just became the third owner of a beautifully imperfect

1998 Acura 3.5RL with just under 98k miles. For the year, she is in decent condition, however, she needs a little tlc. Starting from very important to it can wait is the leaky fuel tank. I can tell she sat for a while. I need to drop the tank and see where the leak is coming from. I have narrowed it down to a hole either on the side or the top, I just need to access the tank itself in order to complete the repair which seems kinda tough since Issa shield over the tank. Has anyone else had this issue before? Any advice would be helpful. Secondly, I need to change out spark plugs and coils but that doesn't seem to difficult since the engine isnt Transverse. Thirdly, the dreaded timing belt and water pump which I'll get someone else to handle. Any advice in general would be very helpful. Always wanted one of these. Looking to get her to 100 percent and enjoy her for many years to come..
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Old Aug 3, 2025 | 09:11 AM
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zeta's Avatar
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From: S. Florida
Originally Posted by Jwrigh32
Starting from very important to it can wait is the leaky fuel tank. I can tell she sat for a while. I need to drop the tank and see where the leak is coming from. I have narrowed it down to a hole either on the side or the top, I just need to access the tank itself in order to complete the repair which seems kinda tough since Issa shield over the tank. Has anyone else had this issue before? Any advice would be helpful.
The below will give an idea, as to what's involved, about removing the fuel tank for repair:

Fuel Tank: Service and Repair

Fuel Tank Replacement
WARNING: Do not smoke while working on fuel system. Keep open flame away from your work area.

1.Relieve the fuel pressure.
2.Remove the seat cushion.
3.Disconnect the 10P connector from the fuel unit wire harness.
4.Remove the access panel from the floor.
5.Disconnect the 2P and 3P connectors and harness clip.
6.Remove the Fuel Tank vapor recirculation valve mounting bolt and Fuel Tank vapor recirculation valve.
7.Remove the Vapor signal tube from the clips.
8.Remove the fuel unit wire harness from the access panel, and pass the Fuel Tank signal tube.
9.Jack up the vehicle, and support it with jackstands.
10.Disconnect the muffler mount.
11.Remove the heat shield.
12.Remove the fuel tank covers.
13.Remove the drain bolt, and drain the fuel into an approved container.
14.Disconnect the hoses. Slide back the clamps, then twist hoses as you pull, to avoid damaging them.
15.Place a jack, or other support, under the tank.
16.Remove the strap nuts, and let the straps fall free.
17.Remove the fuel tank.
If it sticks on the undercoat applied to its mount, carefully pry it off the mount.

18.Install the drain bolt with a new washer, then coat the drain bolt with Noxrust 124B. Allow the Noxrust to dry for 20 minutes.
19.Install the remaining parts in the reverse order of removal.

Good Luck!
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