Broken oil pump shaft

[oilheadron]

Is there a shaft between the intermediate oil pump shaft and the distributor? If so, can it be replaced without removing the oil pump?

[SVOeric]

there is a shaft between the distributor, and the oil pump, yes, it can be removed and replaced pretty easily.

That said, I've NEVER, EVER heard of one of these breaking. -- There is a much bigger likelihood that the distributor gear has stripped (and not turning) the distributor, or the oil pump. -- should be noted, -- this condition also means no spark.. so the engine isn't likely running.

The aux shaft (that gear that the timing belt goes around on the drovers side of the engine) turns the distributor, which connects to the rod that runs the oil pump.
highly suspect your issue is the gear, not the shaft.

Can the gears be replaced without replacing the oil-pump, YES, -- chance it will happen again, if you don't also replace the oil pump, -- pretty high.

[oilheadron]

So there isn't a shaft between the two? The intermediate shaft looks to be a completely different shape than the piece that fits directly into the distributor shaft (that piece is wobbling around and is apparently broken). Edit: Not the distributor shaft itself.

[svono50]

Yes, there is a hex shaft between the dizzy and oil pump.

So the intermediate shaft is driven by the timing belt. That shaft then drives the dizzy via the gear at the bottom of the dizzy. The oil pump is driven by the dizzy via a short hex shaft that simply slip fits into the bottom of the dizzy shaft and oil pump. The hex shaft is captivated by the dizzy and pump.

If/when the oil pump seizes up, the 'weak link' in the drive system is typically the dizzy drive gear or dizzy drive gear roll pin. It is pretty rare to snap a hex shaft or intermediate shaft when an oil pump locks, but that is certainly a possibility. I can't remember the size of the hex shaft, but you can get a long, extended hex bit and hand turn the oil pump to check to see if it is seized or has excessive resistance to turning.

Does that help explain the 'system' and parts?

[MIKESVO]

Did the oil pump shaft actually break? On my 1st SVO, the dist. gear took out the aux. shaft. Drained the oil, flushed it, replaced the dist., aux. shaft and timing belt and it was all good for many more miles of enthusiastic driving.

[oilheadron]

The shaft that drives the distributor shaft has to be broken. Can somebody show me what is between the intermediate shaft and the distributor shaft. The distributor drive gear is fine but the distributor shaft isn't rotatating at all. HELP!!!

[SVOeric]

Nothing -- the intermediate shaft, runs from the timing belt, and the gear on that shaft directly turns the gear on the distributor.
the distributor has a hex shaft from the center of it, that runs down into the oil pump.

most likely your distributor gear is sheared.. most of the time, if you don't replace the oil pump (and the gear on dist shaft, and the intermediate shaft if needed) -- it will happen again

[Erics SVO]

FWIW, it sounds like one item is being called 2 different names... The "intermediate/aux shaft" (depends on who you ask <shrug>)is for practical purposes a "short" camshaft as it used to drive the mechanical fuel pump. Its right below the distributor. Being Driven by the timing belt. Which drives the distributor with the gears on said aux shaft, THEN a hex shaped (~ 1/4")? shaft maybe 3" long sticks in the bottom of the distributor itself, which the opposite (bottom) end goes to the oil pump. Chances are if you broke that the pump locked up.... If your distributor is not spinning, its either the belt or one of the gears (on aux or dist) are toast...

[Erics SVO]

Nothing -- the intermediate shaft, runs from the timing belt, and the gear on that shaft directly turns the gear on the distributor.
the distributor has a hex shaft from the center of it, that runs down into the oil pump.

most likely your distributor gear is sheared.. most of the time, if you don't replace the oil pump (and the gear on dist shaft, and the intermediate shaft if needed) -- it will happen again

Looks like I started my post and then edits right about the same time you posted, LOL.

[SVOeric]

FWIW, it sounds like one item is being called 2 different names... The "intermediate/aux shaft"

if you wanna go old-school -- it also ran the fuel-pump on the old carb cars -- so it was also called the fuel pump drive.

[oilheadron]

Thanks much everybody. i'll let you know what I find out.

[Erics SVO]

if you wanna go old-school -- it also ran the fuel-pump on the old carb cars -- so it was also called the fuel pump drive.

Mentioned that in the next sentence! LOL

[oilheadron]

Can both parts be removed from the through the top through the distributor hole?

[Erics SVO]

yuk.jpg

Yes they can. Hopefully you don't see this on the end of your whirly lightning thrower...

[oilheadron]

How can I find the part number for the upper shaft. It's broken.