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Old 02-14-2021, 10:27 AM   #1
Join Date: Sep 2017
Location: San Francisco Bay Area
Posts: 37
Year: 2001
Coachwork: Bluebird
Chassis: All-American flat face
Which diesel fuel cap?

My diesel fuel cap was stolen. Do I replace it with a vented cap? Non-vented?

I have a 2001 bluebird TC FE 2905.


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Old 02-14-2021, 11:26 AM   #2
Bus Nut
TJones's Avatar
Join Date: Jul 2017
Location: Rapid City, SD
Posts: 993
Year: 2001
Coachwork: Blue Bird
Chassis: CS RE
Engine: ISC 8.3 L 260 hp
Rated Cap: 36
My tank has vent port and the cap is not vented. Maybe look into a lockable cap. I'll be putting one on when my bus is ready to hit the road.

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Old 02-14-2021, 11:33 AM   #3
Bus Nut
Rivetboy's Avatar
Join Date: Jul 2017
Location: Huntington Beach CA.
Posts: 939
Year: 1991
Coachwork: Bluebird
Chassis: T/C 2000 28 foot Handy Bus
Engine: Cummins 5.9 Mechanical
Rated Cap: 2
My 91 BB 5.9 also has a vent in the tank and a non vented Locking fuel cap behind a locked fuel door.
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Old 02-14-2021, 01:07 PM   #4
Bus Crazy
Rwnielsen's Avatar
Join Date: Jun 2020
Location: Long Beach, CA
Posts: 1,075
Year: 1998
Coachwork: Blue Bird
Chassis: TC2000, 40' MPV
Engine: 5.9 Cummins/B300 trans
Rated Cap: U/K
I just have a screw on brass cap behind a locking door
98 TC 2000
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Old 02-14-2021, 01:28 PM   #5
Bus Crazy
Mountain Gnome's Avatar
Join Date: Oct 2017
Posts: 1,222
Year: 1999
Coachwork: BlueBird
Chassis: TC1000 HandyBus
Engine: 5.9L 24V-L6 Cummins ISB
Rated Cap: 26 foot
My cap is not vented, and the lock will jam if I lock it, and I have to turn the key with a pair of pliers. Seems to be the corrosion starting on the inside of the tank; the lock turns freely when the cap is not installed.
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Old 02-14-2021, 07:05 PM   #6
Bus Crazy
Join Date: Oct 2020
Location: Near Flagstaff AZ
Posts: 1,951
Year: 1974
Coachwork: Crown
Chassis: "Atomic"
Engine: DD 8V71
For our buses, the fill port and cap location is behind a locking door flap. But on our Freightliner ambulance, the fuel cap is exposed on the tank beneath the steps. We had to replace the cap with a locking one, to meet some convention show requirements in Austin, and we paid about $100 for a nice Stant locking cap. And even though it's a top-quality cap, it's a bit scary to use. The locking mechanism is a toothed cam and if you lock it, then someone (intentionally or accidentally) tries to unscrew the cap...or if they fire marshal tightens to make sure it's secure, the teeth grab the inside of the fill pipe and it's then very hard to unlock. Although I've not yet broken the key, it sure makes me cringe. If it weren't for the show requirements at some events, I'd skip the locking cap.

On a side note, a regular 2" threaded pipe cap works fine. But most "real" caps have meltable sections, in case of a fire I guess...
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cap, diesel, fuel

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