I have recently purchased a Tundra R that is missing its oil pump. I found the pump in the toolbox, basically the ears were worn/cracked off and the end of the square-drive shaft appears to be stuck in the end of the crank. This looks to be a common problem as my friends' Tundra II also has the oil pump removed from it.

I am probably going to go pre-mix with this sled in light of this, which is kind of crappy since I enjoy the simplicity of oil injection and using the same fuel for all of my sleds instead of having a special fuel can for either.

I do have another fine oil pump that I could use, but that can only happen if I find a way to remove the broken off shaft stub from the MAG end of the crankshaft. Any ideas as to how I can do this? Maybe a small drill bit? It would have to be very long to get in that far.... I will have to get a really close look tonight to see what I'm up against. I do not beleieve that there is any material sticking out of the square hole, it's just broken off flush with the end of the crank.

Try drill a hole in the shaft, thread in a sheet metal screw, and pull it all out with a vise-grips. Don't make the hole too small, or putting the
screw in will expand the plastic, binding it.

Or, take a ring shank nail, heat red hot and stick it to the shaft stub. I don't think there should be much if any resistance to pulling the
stub out. Getting tools to fit in there will be the trick.

I like the ring shank idea ! Real similar to the way I plugged the oil line , I had rivet shanks laying all around , heated one with a lighter and shoved it into the line until it wouldn't go any further and clipped it flush with the end of the line , dabbed it with silicone .

Those are two decent ideas there, I may try the hot nail first though since I can't see in there very well and don't really want to put a drill bit in without full view. At least the nail isn't turning/cutting.

Hopefully one of these will work, more news tomorrow.

Et, voila!

Click to view attachment


It's a terrible pic, but you get the picture. Red hot #8 x 5" length deck screw did the trick.

Good advice fellas, many thanks. After about 2hrs it finally came out, but it took a lot of determination. I really, REALLY wanted to get the oil injection working again!

I removed all oil injection from every tundra I ever had until I had my 2006. I always mixed gas as thats what the trappers do for the most part - the reason being that plastic injection pump nonsense that breaks when you don't realize it. I also mixed at 40:1 as I always worked them pretty hard and in warmer weather.

But I can also understand why you like it.

Louis

I get the durability of it, but if I plan to move this one in the future, I'd best have the oil injection working correctly... with the possibility of kids driving this thing and fueling it, being able to run straight gas is even more important. I still mix my gas 100:1 to be safe anyway.

Hi,

I left the oil pump on my 94 Tundra for 12 years but became worried that it was getting old and took it off -- however still looked good. It seems that the screws holding it tend to work loose and I have a habit of checking that every time I ride my new Tundra. Blue loctite seems to work pretty well. I have a feeling that the reason a lot of them break is because the screws have become loose. I thought this problem was unique to the Tundra but noticed a loose oil pump on one of the work SWTs last year. I agree that the pre-mix is a bit of a pain compared to the injector.

I bet there are a lot of like new oil pumps out there since some take them off from day 1. Hopefully you will have time to ride the Tundra a bit and check it out before getting rid of it.

Dan

Yes, that was my assessment too; the four main mounting screws have a tendency to work loose. The oil pump that I found in the toolbox (LOL) also had the two ears on the pump itself worn away to nothing (!) which points at these two mounting screws as a culprit as well. It was my plan to replace the 4 mounting screws with M6 bolts and locknuts, but seeing as I had no need to remove the fan housing and the plastic holes were in great shape, I decided to just use them again with red loctite instead. It should be a lot better than what was originally there anyway.

I am torn on this one, I may just keep it for the fun of it. It's in almost perfect shape and I have been completely through it; chaincase, engine, driveaxle brgs, track, rear suspension, electrical - the works, so I know it's going to be a rock-solid sled. My buddy picked one up for his young fellow, so we could trailer the two of them a long ways out of town to explore some very remote areas rather than having to lug around our primary sleds. Very tempting to keep this Tundra II, much moreso than either of the 440's.