Ep. 6: CJ2A Mechanical Fuel Pumps for Dummies (me!)
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- เผยแพร่เมื่อ 23 ก.ย. 2020
- [2023 Edit] - I kinda wish the algorithm would stop recommending this one because I had no clue about anything back in these days... Seriously, how did this one get 11K views?
In this episode. I learn more about the inner workings of a mechanical fuel pump off the 1948 Willys CJ2A Jeep. As a millennial who is used to vehicles with electric fuel pumps, this was a good learning experience. Some are rebuildable, some are not, sometimes it's just easier to replace rather than rebuild. - ยานยนต์และพาหนะ
I cut a slot in the top of both mounting bolts so that I can use a screw driver to install the fuel pump. It makes it so much easier. Also, I found several original ww2 engines that had this.
Its usually the check valves, dirt or wear... The older bakealite ones were better, you can retention the springs, but it doesn't really last that long.
That pump is a reproduction 2a pump, not an AC pump nor M38. Thats why the valves are staked and doesn't have a retainer... not easily rebuildable...
It has a one way valve that prevents it from bleeding back to the tank. It probably has it plugged to the max.
Hi there! 1959 AMC Rambler Super (pt.21) here, I have a old fuel pump kind of similar to those in those video but I'm not sure if mine works, can I ask what type those are called and which online store you have bought it from? It would probably work on a 195.6 ohv six cylinder engine, which is the engine my rambler has (when it gets out of the rebuild shop).
I don't know if they have a specific name other than just a mechanical fuel pump (versus an electrical one). The one in the video is specific to these old Willys Jeep engines because the lever that actuates it has to ride on the cam shaft to actually work. Other ones may have longer levers on them to reach further into the engine to reach the cam shaft (ie for a V6 or V8 versus an I4 or I6).
You can easily test your pump if you pull it off the engine and move the lever on it. If you hear a squeaky puff of air (I think I had a couple of audible ones in this video from the new one), it's probably working ok. If you hear nothing, the diaphragm is probably toast. Similarly, you can try blocking the inlet of the pump with your thumb and see if you feel any kind of suction on it when moving the lever, or block the outlet of the pump with your thumb and see if you feel pressure pushing against your thumb when moving the lever.
You might try places like Summit Racing (likely a good bet) or Jegs, maybe even Ebay for an AMC compatible one. There's definitely a rebuild kit for an AMC Rambler I6 fuel pump on Ebay right now.
@@SunkCostGarage wow that was a helpful response! Thanks! The fuel pump lever that connects to the cam shaft is very stiff, I don't have a vice to hold it to try and move it harder but I'll try again when I get home, I don't mind working on things in the car, but the less things that are broken the better! I'll also look for the rebuild kit you mentioned and see if if matches the pump I have, thanks again for your time!
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