Question about Honda Prelude
There 2 filters on your car:
1. By either the left or right suspension strut tower (gold colored canister)
2. By the gas tank
I suggest you replace both.
The one by the gas tank is like a prefilter and I will start with that one first:
Jack up car and put on axle stands or ramps then locate filter on the fuel line. Disconnect hose clamp from gas tank hose side FIRST (inlet) and use a spare bolt to block off the line otherwise fuel will spill all over the place.
Disconnect other side (outlet) then replace in opposite order.
You will need to use the grip part (not the cutting part) of a pair of pliers to GENTLY twist the hoses to break the seal on the rubber hose has made on the pipes as after years of clamping pressure they are bound to be tightly sealed on there. Remember to do it gently as you run the risk of crimping the pipes (not good!)
Also the filter should come with an arrow stamped on the body of it. Be sure to install the new filter with the arrow pointing towards the front of the car (this is very important as they are designed to flow only one way)
Sometimes these filters dont attach with hose clamps. In this case you will need a flare nut spanner (see below for explanation)
Now for the one in the engine bay:
It might pay to disconnect the battery to avoid the risk of fire.
I'll warn you that the fittings on this one are pretty tight so you will probably need a big bar with a socket to crack them.
The top fitting is what is known as a banjo fitting whereby a big bolt goes through a ring that is connected to the pipe.
Below this ring will be a hex (like a nut as part of the body of the filter). Attach an appropriately sized spanner on the hex then attach the bar with socket to the nut.
The spanner on the hex part is used to stop the filter from twisting while you apply pressure to the bolt to undo it (you may need someone to help hold the spanner). Only undo it untill the boolt has 'cracked' then leave it.
The other fitting (inlet) will either be on the bottom of the filter or at the top by the outlet but either way directions are the same:
You will need whats called a flare nut spanner (also called a pipe spanner) the right size for the nut fitting. It's like a ring spanner but with a cutout in it to slip over the pipe and over the nut fitting.
You also have a hex type fitting on this side too so attach appropriate sized spanner, attach the flare nut spanner and loosen as you did the other fitting (using the spanner to stop the filter twisting).
Take both pipes off but be careful with the banjo fitting side as there are copper sealing washers and you want to remember where they go (replacement washers should come with the new filter)
Replace washers and fit pipes in reverse order, attach battery, start up and enjoy :)
Hope this helps :)
Posted on Aug 03, 2008
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Posted on Jan 02, 2017
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