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I got the highly anticipated telephone call today.......my engine is ready to go!! The only big surprise......the camshaft had to be replaced because the lobe that the fuel pump runs on was almost worn completely down. Other than that......and the previous surprise about the one oversized journal required on the crankshaft......everything else reportedly went back together aok. Of course, now I'm worried about my fuel pump. I was going to reuse the one I took off inasmuch as it was working prior to the rebuild.....but in light of the damage that was done to the camshaft I wonder if I wouldn't be better off replacing it. Decisions decisions decisions..........can anybody tell me if they've ever had this kind of fuel pump do this to their F-134 engine?

There was no spacer behind the fuel pump.......it was bolted up directly to the engine. My understanding was this just results in increased fuel pressure......can it also result in a worn out cam lobe?

Anyway......tomorrow I pick up the engine.........early next week I get the blasted frame back......in between I finish rebuildng my front axle and repaint it.......and then....hallelujah......its reassemly time!!!! Yeeeehaw...finally!!!

Jim

I guess that depends on what type resto you are doing. That pump is a later civvy pump. It just may be that the prior owner was having low pressurte problems and removed the spacer to raise the pressure when all along the low pressure problem was actually a worn cam.

So if you want correctness you need the correct pump. If you want a driver and you can operate the lever of that pump with one hand I would get a spacer and reinstall that pump and check it with a pressure gage.

For now this isn't really a restoration as much as its a repair and a return to dependability. With that said wherever possible I have been going back in with original parts simply because in my opinion if that's what Willys designed in there originally then it must have been adequate and proper. And that's what I'm after. Regarding the dual action fuel/vacuum pump.....we've already discussed the fact that I have no vacuum wiper equipment left......and that the vacuum boost of the pump is not necessary for proper operation of the engine......so it looks like the vacuum side of the pump is going to be abandoned. It certainly makes no sense to replace the pump with an original (esp. given the prices of these pumps) if I have no need of the vacuum side. So this is where I depart from restoration......but I still want to do it "right".....operationally right.....so the next guy isn't surprised by a worn down cam lobe or having to go looking for a pressure regulator. I will probably change out this pump for a single action pump and put this one on the shelf as a maintenance spare. Do all the fuel pumps (when properly installed) apply basically the same amount of pressure on the cam lobe.....or are there some that are lighter and some heavier? I quess thats rhetorical because I imagine all of the cam lobes will suffer after 50+ years in operation. You're right......I'll install one that's correct for the model and check it with a pressure gauge.

Jim