How much of the oil pump do I pack with jelly after rebuild?

[KYJ10]

Just finished rebuilding the oil pump and was wondering if you fill all the holes and chambers with petroluem jelly, or just the cavity that has the two gears? Thanks Dennis :rolleyes:

[John V]

All I did was fill the large cavity, worked fine and it's all the book said to do. Good luck smile.gif

[Kukur]

I only did the gear cavity on mine a couple weeks ago, and it primed with no problem.

Although I did have the same question at the time.

[bvibert]

I'm in the same boat too... Just filled the gear cavity, wish I knew for sure when I was doing it smile.gif I primed it with a home made priming tool before cranking it over and it worked fine :D

[Stolen76]

It should pick up without any jelly. It primes faster with it. The biggest deal with the jelly is that it hold the gears in the pump while it is on the engine. The more you can get in the better for priming, but it will pick up as long as your relief bore and pin are in good shape.

[Kukur]

I didn't have a extra distributor so I actually used my existing distributor to prime the oil pump (after packing the gears) once everything was on the new engine. I just removed the gear, use a 1/4" ratchet extension (fit inside the shaft where the rotor attaches) and attached it to my drill.

Once everything was good and primed, I replaced the gear and installed the distributor.
I also made sure to fill the oil filter prior to installing it to help out.

But this was all on a new engine.

My .02¢

[Rogue]

i use STP instead of jelly

[mdill]

All you need is to make sure the gears have something that will seal the
clearances between the gears and housing. petro-jelly is good as it stays
put and will desolve in the oil. STP might not stay around depending on the
time frame between rebuild and fire up but atleast short term, I think
it would seal up the clearances just fine.
The clearances need to be sealed by oil/jelly .. whatever or the pump
won't pump well or at all because of air leakage from the presure side back to the
inlet side.

Mike D.

[The Preacher]

Mike is right, just need enough to slow down the air flow so it can get good enough suction to pull the oil up.

Talk about a weird job, that vasaline gets everywhere!

[Rogue]

yes a cavitating pump is not a good pump