HOW-TO: Properly Fix your Fuel Door Alignment
HOW-TO: Properly Fix your Fuel Door Alignment
The proper way to align your fuel door is with the factory gaskets.
GM PN #20418784 - fuel door gasket
It usually takes 2-3 to make your fuel door not rub, and I purchased the last two known to exist 3/2017
I measured the gaskets with a caliper, and even made a 1:1 printable page in PDF format so you can buy your own gasket material and trace them.
See the link below:
http://thirdgens.com/fueldoorgasket.php
GM PN #20418784 - fuel door gasket
It usually takes 2-3 to make your fuel door not rub, and I purchased the last two known to exist 3/2017
I measured the gaskets with a caliper, and even made a 1:1 printable page in PDF format so you can buy your own gasket material and trace them.
See the link below:
http://thirdgens.com/fueldoorgasket.php
Joined: Jun 2003
Posts: 5,028
Likes: 78
From: Desert
Car: 1991 Z28 Vert
Engine: 383 single plane efi
Transmission: T-56
Axle/Gears: 8.8 with 3.73s
Re: HOW-TO: Properly Fix your Fuel Door Alignment
That was very considerate of you, thanks for doing that.
Supreme Member




Joined: Oct 2004
Posts: 4,526
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From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: HOW-TO: Properly Fix your Fuel Door Alignment
Thanks man appreciate it
Joined: Feb 2017
Posts: 4,174
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From: Meriden, CT 06451
Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: HOW-TO: Properly Fix your Fuel Door Alignment
Great idea. Thanks.
Re: HOW-TO: Properly Fix your Fuel Door Alignment
Its been a long time since I made gaskets for anything. I see the .033" gasket thickness noted on your drawing. Is that a common thickness? Can you buy gasket material different thickness' nowadays?
And thanks for doing this. I'm pretty sure I'm going to need it!
And thanks for doing this. I'm pretty sure I'm going to need it!
Re: HOW-TO: Properly Fix your Fuel Door Alignment
You can definitely order gasket sheets that are thicker or thinner and still make a gasket, you'll just end up with either more or less flexibility when adjusting
And no problem guys
I researched my *** off to figure this out, as I can't stand not doing things "right". The tech article on this website about putting washers behind the bolts made me roll my eyes lol





