Oil Pump Help

[DanThMan1983]

Just rebuilt a 4g63t.
Disabled fuel and ignition.
Crank to prime the engine lubrication system.
No oil pressure reading on gauge. (Yes I put in oil )
Take off oil filter, dry as a bone.
Oil pump not pumping for some reason?
Any suggestions before I start ripping it apart?
Anyone had problems with oil pumps?

 

[FORMONTOYA]

Sounds stupid, but the first thing I would do is drop the pan to make sure the pick-up tube is connected/on.

I've done stupider things before.

 

[95blackGsTurbo]

I had a similar problem with mine. Couldn't get it to build oil pressure. But as soon as I got done cranking it I went to get a socket and air ratched and my friend enabled everything and started it up and it built perfect oil pressure. How long did you crank it for?

 

[FORMONTOYA]

I had a similar problem with mine. Couldn't get it to build oil pressure. But as soon as I got done cranking it I went to get a socket and air ratched and my friend enabled everything and started it up and it built perfect oil pressure. How long did you crank it for?

That just worked out great....for you.

I would be very leary of enabling everything and starting it up if it wasn't building pressure while cranking. Mine built pressure after about 5-10 seconds of cranking.

But yes, you should disable fuel and ignition and turn it over for roughly 10 seconds or so to have it build pressure.

 

[DanThMan1983]

Disabled fuel and ignition. Cranked 4 different times for 15 seconds and there was not one drop of oil being pumped. Oil filter was bone dry. I specificlly remember the oil pickup being put on correctly. I thought it was the oil pickup at first too and I was going to pull the pan off but I just know that thing is on there right.

 

[DanThMan1983]

double post.

 

[FORMONTOYA]

Disabled fuel and ignition. Cranked 4 different times for 15 seconds and there was not one drop of oil being pumped. Oil filter was bone dry. I specificlly remember the oil pickup being put on correctly. I thought it was the oil pickup at first too and I was going to pull the pan off but I just know that thing is on there right.

I'm not doubting your mechanical abilities, but the easiest thing to check is the pick-up tube. No matter what the cause you'll probably end up draining the oil anyway, so you might as well make that your first check.

I've uncovered several problems over the years that I just knew it wasn't "XXX", only to hunt all around the issue, spend time and money, then later find that in fact it was "XXX".

my $0.02.

Good luck and let us know.

 

[ITSME4G63]

I had the same damned problem! Brand new oil pump, primed and greaased up and everything, took a shit upon startup. plled off oil cooler lines and cranked it, no oil. Had to pull the bi*** out and get another new one, this time we primed it via socket and ratchet gun before the belt was put on.

 

[92awddsm]

Did you pull the pump apart and pack it with petrolium jelly before installing it? If not, it will take a while for it to build pressure because you are trying to draw oil uphill about 4-6 inches with a dry system. I would remove the timing belt and attach a 14mm socket to a drill and spin the oil pump manually in a clockwise rotation. Even this way on a dry oil pump can take 2-3 minutes before you ever get and oil feed. You can also remove the filter and fill it with oil and reinstall it.. This will aid in the priming process.

 

[DanThMan1983]

I'm not doubting your mechanical abilities, but the easiest thing to check is the pick-up tube. No matter what the cause you'll probably end up draining the oil anyway, so you might as well make that your first check.

I've uncovered several problems over the years that I just knew it wasn't "XXX", only to hunt all around the issue, spend time and money, then later find that in fact it was "XXX".

my $0.02.

Good luck and let us know.

Right I agree, I was thinking about it and tomorrow before I do anything the easiest thing to do would be to take off the pan and atleast have a look.

 

[DanThMan1983]

Did you pull the pump apart and pack it with petrolium jelly before installing it? If not, it will take a while for it to build pressure because you are trying to draw oil uphill about 4-6 inches with a dry system. I would remove the timing belt and attach a 14mm socket to a drill and spin the oil pump manually in a clockwise rotation. Even this way on a dry oil pump can take 2-3 minutes before you ever get and oil feed. You can also remove the filter and fill it with oil and reinstall it.. This will aid in the priming process.

Thanks for that info man that really sounds interesting. I didnt realize it would take that long for the oil to pump up. I dont want to go back and take off the timing belt. I think I am just going to remove the oil pressure sending unit and use a pump to prime the system and attempt to crank some more until pressure comes up. and FYI no I did not pack the pump with petrolium jelly I didnt know I should do that.

 

[TSIfreek]

Thanks for that info man that really sounds interesting. I didnt realize it would take that long for the oil to pump up. I dont want to go back and take off the timing belt. I think I am just going to remove the oil pressure sending unit and use a pump to prime the system and attempt to crank some more until pressure comes up. and FYI no I did not pack the pump with petrolium jelly I didnt know I should do that.

Yea you really need to do that. Thing also to remember is you have no lubrication inside the pump and causeing damage. If it were mine I am a freek about things so I would take it all apart again down to the pump and lube the shafts with assembly lube and pack it. I wouldnt beable to sleep at night not knowing if I caused any damage to the pump. I always look at it as its an expensive part that can cause big problems to other expensive parts in the motor. your time is free.

 

[ITSME4G63]

While were on oil pumps, and not to hijack a thread, what yall think of electric ones? Heard the c6 z06 sports one.

 

[TSIfreek]

While were on oil pumps, and not to hijack a thread, what yall think of electric ones? Heard the c6 z06 sports one.

The new corvetts I thoutht I read are running a dry sump system not sure though?? You may be thinking of the dry sump pump running off a belt??
I have never heard of electric oil pumps? Electric water pumps yea.

 

[DanThMan1983]

Yea you really need to do that. Thing also to remember is you have no lubrication inside the pump and causeing damage. If it were mine I am a freek about things so I would take it all apart again down to the pump and lube the shafts with assembly lube and pack it. I wouldnt beable to sleep at night not knowing if I caused any damage to the pump. I always look at it as its an expensive part that can cause big problems to other expensive parts in the motor. your time is free.

Right I am there with you but did it really cause any damage? It doesnt have oil running through it but at one time it did leaving little lubrication ... enough to be okay until new oil comes up?? I dont know. anyone have anything thoughts on what TSIfreek said?