I picked up a lisle spill free funnel 24680 to use to burp my truck. I went to try it out and the only cap that fits is the small cap c but I can't seem to get any of the adaptors to fit snug. The closest adaptor I could find was also labeled c. The radiator in the truck is not oem but an aluminium one that was in it when I purchased the truck. It has an oem cap though so I would assume it's the same filler neck as an oem radiator. I know some of the forum members have used this funnel successfully so I am wondering if someone could tell me what adaptor they used from the funnel kit and if it fit tight or slightly loose. Thanks
