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1) I Lost pressure for the first time around because I had a broken O-ring inside there. I split it when I was reassembling the unit (or rather the guy that did it for me split it)
2) The rings are not the same! Yes, they are the same thickness, but they are not the same diameter. So yes, if you're using a smaller diameter ring, then the drop in method will not work properly. If you stretch it over the port and then press into the fuel filter tube, that will work, but it wont hold pressure properly. If this is what you are using, I suggest you let your car sit overnight and feel the pressure in the morning. It should still retain a decent amount of pressure. When I was using this smaller ring, my car was loosing pressure immediately after shut down. I agree with you, it was probably because I didn't install it the proper way, but if I had the proper ring to begin with, there's almost no way for it not to be seated properly no matter which way you do it.
3) When I finally found the proper ring, I installed it the "incorrect way" and everything works fine. My car retains fuel pressure even overnight.
In the picture below, from left to right, you can see the ring that you are talking about, the original ring (split) and a replacement that I have found.
Sounds good.
But I don't agree with you claim it won't hold pressure properly if installed on the port? Did you personally test it? Because I did, and it holds fine.
Even if the interior diameter is slightly different laying on the table; after being installed on the port, the thickness holds and you get a good seal-the exterior diameter expands too. When attaching on the filter body it was quite snug and providing quite some friction to twist the two together. It doesn't come apart from gravity if you hold it by 1 end or even by shaking the pair.
If anything I'd claim the other o-rings you got might be too "loose" and not snug enough, if the semi-random force from the filter housing clips was enough to pop the o-ring up onto the port instead of the directed install effort.
But actually, it's just probably being compressed to some degree, compared with the Toyota o-ring being stretched to some degree.
Sounds good.
But I don't agree with you claim it won't hold pressure properly if installed on the port? Did you personally test it? Because I did, and it holds fine.
Yes I have, but it was two years ago, and if my memory serves me right, it was much better than the split ring, it still wasn't 100%.
Originally Posted by raytseng
Even if the interior diameter is slightly different laying on the table; after being installed on the port, the thickness holds and you get a good seal-the exterior diameter expands too. When attaching on the filter body it was quite snug and providing quite some friction to twist the two together. It doesn't come apart from gravity if you hold it by 1 end or even by shaking the pair.
When you stretching it over the port, it does indeed loose a bit of thickness from being stretched. Probably not enough to be noticeable by eye, but when it comes to holding 55psi of pressure, it does make a difference.
Originally Posted by raytseng
If anything I'd claim the other o-rings you got might be too "loose" and not snug enough, if the semi-random force from the filter housing clips was enough to pop the o-ring up onto the port instead of the directed install effort.
No. The replacement ring that I found is exactly the same size as the original ring that was in there. There is a reason why Lexus made different size rings for that port vs fuel pump and pressure regulator.
And no, they aren't stretched over time either. I have the old rings from the old regulator and pump, they haven't stretched at all.
Like I said, our cars need to sustain 55psi at load, and still retain pressure even overnight after the car is shut down.
thanks for the informative info. Whatever I have now seems to be holding up for me, and hopefully lasts as long as I keep the car; otherwise a complete new fuelpump assembly will be needed.
But for someone else doing this procedure in the future, hopefully the discussion is useful to them to do the procedure as smoothly as possible learning from our experiences.
thanks for the informative info. Whatever I have now seems to be holding up for me, and hopefully lasts as long as I keep the car; otherwise a complete new fuelpump assembly will be needed.
But for someone else doing this procedure in the future, hopefully the discussion is useful to them to do the procedure as smoothly as possible learning from our experiences.
Exactly.
If you do however run into problems, call that guy from the o-ring company, he'll send you free sample that you can use. See the info in the pic I posted before.
well bringing this back up FINALLY did mine about 3 weeks ago.....just now getting to the pics
did a semi DIY...its VERY simple to do, only reason my DIY isnt complete is i had gas all over and i will explain why in a second.
well this is what the cover looks like when removed and the plug pulled (unclipped) out of the fuel filter. you can see the plug in the left side of the picture
if u wiped this are clean (all that is road dirt/grime) where you see my YELLOW ARROW you would see a yellow clip, you will slide forward (towards the passenger side) to remove the fuel line from the car (i used a small flathead and scooted the clip forward) then when you remove the fuel line (just pull upward it is kinda stuck but it does come) you will figure out REALLY quickly this line is pressurized and i squirted ALOT of gasoline onto my concrete as it sprayed down and out the hole also the RED ARROWS are the screws you need to undo, to get the fuel filter out of the car.
this is step i was missing when i did my fuel filter
this YELLOW ARROW shows the pressurized fuel line, unclip this connecter and slide the fuel line down off the assembly (remember its pressurized so it will shoot gas out of it) so either have a glass jar or a bottle nearby when doing this or just let it drop back into the gas tank....i dont remember what i did
this is what the fuel filter assy looks like when you clean it up, upper right part is where fuel line connects along with the yellow clip
CLOSE UP
old fuel filter assyl with old sock next to new fuel filter
To remove the old assy you will see clips all around the old one, simply unclip them. here are some by the arrows
i missed a few steps in here as i had gas every where on the cement from the fuel line and it stank and i was in a hurry
next the fuel pump with dirty sock compared to the clean sock
new fuel filter with new sock attached to old assy
reinstall in reverse....honestly REALLY simple to do
now the aftermath photos
old one cut in half
one side of it
removed from assy
mine was REALLY dirty and i dont even have 120k on my car yet lol. even with my dynamat in the car on my last tank of gas i got 18.9 in the city WITH my full interior installed and all my audio equipment in and i was still kinda ******* it since i put my greddy exhaust on
Brought this back from the dead...nice write up. I will search to see how to take out the back seat and do this. I've never seen a fuel filter look like this. I thought this was actually the fuel pump at first sight. Most fuel filters are just the typical can filter with a inlet and outlet spout. The filter is kind of expensive too...didn't expect it to be around $50.
Brought this back from the dead...nice write up. I will search to see how to take out the back seat and do this. I've never seen a fuel filter look like this. I thought this was actually the fuel pump at first sight. Most fuel filters are just the typical can filter with a inlet and outlet spout. The filter is kind of expensive too...didn't expect it to be around $50.
Did you feel any improvements after the fuel filter change? How many MPG did you gained?
I recently purchased a 98 Lexus GS300, that needs some work. It didnt have a fuel pump, just the assembly. Just installed the fuel pump but not sure where this one wire goes.
03-18-11, 12:08 PM
