Tanked

'08 T660, the (latest) problem I'm having is with the fuel tanks. Specifically with the caps. The driver's side cap doesn't tighten, just kinda spins around, and leaks fuel onto the tank. I've looked at the threads and they seem to just be worn out from 11yrs of grit in the threads and 16mos of my obsessive need to tighten them as much as possible.

New tanks are $600/each (might as well replace both) but I was wondering if I could replace the stock KW with PB tanks (800/each[?]). My reasoning for doing so is PB doesnt have threads, just positive open/shut locking 'teeth'. There's a 1.5" difference in diameter, but I dont think that would be a problem. I'm just wondering about the siphon/return/sending unit flange and whether they are compatible.

Thoughts?

 

That setup costs almost as much as new tanks....LoL About half, actually. Since it twists on, set screws notwithstanding, I'm not sure how well it will actually work.

Stop Kenworth Fuel Cap Leaks | Leak Defender®

 

On a positive note, I changed my fan belt from Gates to Paccar and the squealing has stopped. IMO $90 was cheap because I haven't any hair to pull out.

 

PB is 1.5" larger.
Might try tapping the neck, thanks.

 

Not after seeing the worn threads on the tank. I might try swapping sides, though.