Sandy455 Posted October 30 Share Posted October 30 (edited) Have been driving my 1970 240Z on the street and track for 12+ years. I've replaced the seal and stock gas cap over the years. But getting the cap 100% screwed down is always a challenge. And there have been times I was sure it was fully closed but it wasn't and had fuel leakage down the rear fender during time trials. To that end, anyone out there installed a more modern/aircraft style fuel cap with a new fuel filler opening? Thanks. Edited October 30 by Sandy455 Quote Link to comment Share on other sites More sharing options...
jhm Posted October 31 Share Posted October 31 I have seen some folks add a Ferrrari-style "pop-up" gas cap and filler; but it's not a trivial mod cost- or work-wise. And it's usually done for asthetics vs functionality, IME. I'm curious....are you using this style cap? It's what I use; and have no problem with spillage/leakage at the track, even when the tank is fairly full. https://www.zeddsaver.com/collections/gas-caps/products/240z-280z-gas-cap-with-retainer-ring I'm interested to see what other folks have to say -- following. Hope you find a solution that works for you!! Quote Link to comment Share on other sites More sharing options...
Sandy455 Posted October 31 Author Share Posted October 31 Yes. That's the set up I have now. But as I'm hearing from different folks in my Datsun world since I posted this, replacing the inlet/ring to something else is extremely pricey. 1 Quote Link to comment Share on other sites More sharing options...
darom Posted Monday at 05:03 PM Share Posted Monday at 05:03 PM I bought a gas cap for a 2002 bmw for my 280z (MSA used to sell them, it is showing out of stock: https://www.thezstore.com/product/4445/locking-gas-cap-70-76-240z-260z-280z ) The cap fits tight. Not sure if this is something that will work for your racing events. Quote Link to comment Share on other sites More sharing options...
Sandy455 Posted 9 hours ago Author Share Posted 9 hours ago Thank you for your response but I'm a little confused... You bought a 280Z gas cap for your BMW? Or you bought one of those locking models for both cars? Either way, yes, still out of stock. Quote Link to comment Share on other sites More sharing options...
darom Posted 8 hours ago Share Posted 8 hours ago Sorry about the confusion. I bought a 2002 bmw gas cap which I installed on my '76 280z. Quote Link to comment Share on other sites More sharing options...
Sandy455 Posted 7 hours ago Author Share Posted 7 hours ago Okay. Sorry. But now I'm doubly confused. The out of stock locking cap you posted is for a 280Z, right? Where is the 2002 cap you purchased? Quote Link to comment Share on other sites More sharing options...
Mitchel0407 Posted 7 hours ago Share Posted 7 hours ago As I understand it he needed a new gas cap for his 1976 280z and found a gas cap from a 2002 BMW that fit his 280z Understand that in general engineers are lazy people (I could know, I am one) and the wheel can only be invented so many times before you start making similar products. So no I don’t find it weird at all that a gas cap from a 2002 BMW happens to fit on a 1976 Datsun 280z. Hell my 1977 280z is running a AFM from a 1996 Mazda 626! 😂 Quote Link to comment Share on other sites More sharing options...
Sandy455 Posted 7 hours ago Author Share Posted 7 hours ago (edited) Yes. Thank you. Looking forward to his reply on that 2002 cap. Edited 6 hours ago by Sandy455 Quote Link to comment Share on other sites More sharing options...
jhm Posted 5 hours ago Share Posted 5 hours ago Similar to what @darom did, I located one of those old Bimmer locking gas caps and gave it a try. It does indeed have a tight fit on the Z's gas cap inlet; but I found that gas could slosh up and leak out through the internals of the cap during hard cornering when the tank is near full. IIRC, it's an internally vented breather-style cap. It didn't work for my intended application; and I don't think it would work for yours. However, if you want to give it a try, I can dig through the garage to see if I still have it....LMK. Quote Link to comment Share on other sites More sharing options...
darom Posted 4 hours ago Share Posted 4 hours ago I installed 10-12 years ago, the fuel prices were high and there was some gas theft going on in my area. I needed a lockable gas cap 1 Quote Link to comment Share on other sites More sharing options...
Sandy455 Posted 4 hours ago Author Share Posted 4 hours ago (edited) Thank you., JHM . Appreciate the offer. But if you had any kind of sloshing out on the street, then no, it won't work for the track. With a full tank and 40 tread wear tires up to temp at a place like Streets of Willow, every left turn with the car's physics fully loaded right sends a cascade of fuel out of the cap, down the fender, and gets me black flagged off. Darom -- I think that's the cap that's now out of stock. Unless you have a source for it we don't know about? Edited 4 hours ago by Sandy455 1 Quote Link to comment Share on other sites More sharing options...
darom Posted 4 hours ago Share Posted 4 hours ago (edited) I believe this is the part: https://www.autohausaz.com/pn/16111103603 or here: https://www.fcpeuro.com/products/bmw-fuel-tank-cap-2002-2002tii-1602-16111103603-1 Edited 4 hours ago by darom Quote Link to comment Share on other sites More sharing options...
jhm Posted 2 hours ago Share Posted 2 hours ago 1 hour ago, darom said: I believe this is the part: https://www.autohausaz.com/pn/16111103603 or here: https://www.fcpeuro.com/products/bmw-fuel-tank-cap-2002-2002tii-1602-16111103603-1 Yep, that's the correct part number (and the same one I bought for my Z). Looks like it's still available from multiple sources. Quote Link to comment Share on other sites More sharing options...
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