Oil pump broken , so what ?

[1 Wild R/T]

NO
The grease will help seal the pump to pull in new oil .
The rest of the time the oil is submerged in oil & will be protected by the oil , there had to be debris going through the pump at some point to cause the damage seen

Like I mentioned in my first post, look at the damage, it looks more like rust pitting.... I've seen to many oil pump drives sheared off do to minor debris like valve stem seals to believe enough anything hard enough to damage the rotors passed through the pump without shearing the drive...   

[Chryco Psycho]

NO doubt it could be but I have also seen damage like that not caused by rust
Soon we will know more !!

[chargerdon]

If it were me, I'd change the pump and run it.

That's what i would do as well...Pumps are not expensive and easily changed on a big block...so change it and then look at the pressure if it is good...your done.   If still bad then start tearing down the engine !!

PS...I would put in a Melling High Volume pump...Not High Pressure.      If the bearings are weak, the High volume pump will increase the pressure about 10-15 PSI over a standard pump.    A HP (high pressure pump) will NOT increase the pressure at idle or low RPM's.   The only difference in a standard and High Pressure pump is a spring setting on the pressure bleed off valve to allow a higher MAX pressure before bleed off.   This only matters when the engine is cold !   When hot and pressure drops no difference !  Conversely a High Volume pump moves more oil at same RPM..so it will give higher pressures !   

Also, not knowing how many miles are on your engine, but, if its high mileage its a good idea to run 20W-30 weight oil instead of the 5W or 10W.   

[Chryco Psycho]

Never use a high volume with a stock pan you can empty the pan & starve the brgs

[1 Wild R/T]

Never use a high volume with a stock pan you can empty the pan & starve the brgs

  High volume pump = bad idea..

[dodj]

Never use a high volume with a stock pan you can empty the pan & starve the brgs

  High volume pump = bad idea..

I didn't know that. Learned something again from you two. 

[HP_Cuda]

I agree with Wild, drop the pan and check 2-3 bearings.

No use in making the problem worse by ignoring it and just throwing another pump at it.

[dodj]

I agree with Wild, drop the pan and check 2-3 bearings.

No use in making the problem worse by ignoring it and just throwing another pump at it.

My theory is, if crap has gone through the pump, it has already destroyed the bearings. So you have nothing to lose by replacing the pump and running it. You might get lucky. If not, and a bearing is ruined, a little more ruined won't cost you any more when it comes to a rebuild.

[1 Wild R/T]

I agree with Wild, drop the pan and check 2-3 bearings.

No use in making the problem worse by ignoring it and just throwing another pump at it.

My theory is, if crap has gone through the pump, it has already destroyed the bearings. So you have nothing to lose by replacing the pump and running it. You might get lucky. If not, and a bearing is ruined, a little more ruined won't cost you any more when it comes to a rebuild.

Unless it spins a main bearing & seriously damages/destroys the block.....

[Chryco Psycho]

  Which I have seen using HV oil pumps with a stock pan on a long high RPM pull

[jimynick]

As mentioned, I'd cut the filter and perform a diagnosis, then I'd drop the oil and run a good magnet through it and see what sticks. If it looks good, I'd then put a magnetic pan plug in it and keep an eye on the oil pressure gauge for a while. You MAY have dodged a bullet, but the oil pressure will tell a tale. Pulling the pan is still something to consider as catching a bearing before it eats it's journal is a whole lot cheaper than not catching it. Just my 

[HP_Cuda]

Exactamundo!

I agree with Wild, drop the pan and check 2-3 bearings.

No use in making the problem worse by ignoring it and just throwing another pump at it.

My theory is, if crap has gone through the pump, it has already destroyed the bearings. So you have nothing to lose by replacing the pump and running it. You might get lucky. If not, and a bearing is ruined, a little more ruined won't cost you any more when it comes to a rebuild.

Unless it spins a main bearing & seriously damages/destroys the block.....

[Eblood]

 Hi guys, i pull the pan ans check the bearing, eveything IS ok, nothing compared to oil pump ! I ve installed the New oil pump , crank it with the Starter but the oil pressure is nil. Do you think i should measure anything by just actionning the oil pump by thé Starter ? Im just a bit affraid cranking the engine if still no pressure..

[Chryco Psycho]

As I suggested you may need to coat the rotors with lubriplate / grease so the oil pump will prime

[RJChallenger]

As I suggested you may need to coat the rotors with lubriplate / grease so the oil pump will prime

You may or may not do more damage to your motor, using the starter to prime the pump. you could just start the motor and hope for the best. I would follow Chryco Psyco advise pull the pump ,coat with grease and re-install the pump. Now that you know that the bearings look good ,why chance doing any damage