Am I unlucky or do all aftermarket fuel tank caps suck? (1 Viewer)

[Spook50]

Seems every time I replace my gas cap, it fails and lets fuel slosh out my fuel door while I'm driving within just a few months. I know it's not a pressure issue because I did the "hose swap" trick on my worn out charcoal canister a few years ago and haven't had any kind of "whoosh" since when opening my gas tank. I'll be ordering a couple OEM Toyota caps next time I'm on Partsouq, but man, aggravating. Good thing it'll be getting paint (hopefully sooner rather than later).

 

[php74]

Every time I’ve ever thought “ahh..aftermarket part in this application won’t matter” I’ve been wrong..

 

[Spook50]

Right? Unless it's specifically designed as an upgrade, and even then....

 

[Seth S]

Why not just get the oem cap?

 

[Hojack]

Are you sure you don’t have fuel pressure building in the tank? Have you checked the charcoal canister? Are you topping off the fuel?
I bought a aftermarket and no problems.

 

[Spook50]

Why not just get the oem cap?

I am. The other times were "well this shouldn't matter if it's aftermarket". Yeah, wrongo

@Hojack yeah there's no extra pressure. The valve on my canister IS shot, but I reversed there lines on it a few years ago. Going to try the Chemtool trick this weekend and see if I can free up the check valve though. If that don't go I'll put a Delco canister in.

 

[SteveH]

I bought a $3 gas cap from Rock Auto - works perfectly. OEM had a rotted gasket.

 

[Randy88FJ62]

Is your filler neck damaged? Mine was barely working and I ended up cutting the end off and welding a new one on.

 

[Spook50]

Is your filler neck damaged? Mine was barely working and I ended up cutting the end off and welding a new one on.

I highly doubt it is, but it would be worth checking though just in case. If it is I'll see about ordering a new one from Partsouq.

Though if it is and it's just cracked I can easily Tig it back together, and if I can afford the downtime send it off to be zinc plated....

 

[Spike Strip]

Amazon product ASIN B000C5GAT8
For Pressure AND Vacuum relief. OEM on some cars/trucks. 8 years no issues.