oil pump options

[craftsman_454]

hey
im looking for a high flow oil pump for my 3.4, no one seems to be able to come up with anything, just wanted to know if anyone knows if anyone makes one?

[series8217]

the stock pump is a ridiculously high flow oil pump. get a factory replacement pump.

[d.o.h.c]

Gm sells a high flow spring for the 3.4dohc oil pump. I have it in my lumina turbo. It runs about 25 lbs of pressure at idle. stock it like 14.

[85_Olds_Ciera]

hey
im looking for a high flow oil pump for my 3.4, no one seems to be able to come up with anything

GM Performance Parts

[85_Olds_Ciera]

Gm sells a high flow spring for the 3.4dohc oil pump

Same pump for 2.8...3.1...and 3.4 motors (V6/60º)

[napatiger]

The best thing you can do, in my opinion, is get a NEW stock pump and basically take it apart, check for true flatness and smooth the gears... took him about 30 - 45 minutes to plane a top plate and then use a ceramic file on the gears.
My engine re-builder did this in front of me and the difference was very significant.

[85_Olds_Ciera]

The best thing you can do, in my opinion, is get a NEW stock pump

GM High Volume Pump - $84.63

Advance Auto Stock Pump - $39.88 to $62.99

Advance Auto High Volume Pump - $69.88 to $107.99

Myself...I'd buy the high volume pump...which I may do...after checking oil pressure with pressure gauge.

[craftsman_454]

hhhmmm ya know its funny, im a technician myself and i worked the parts counter for 2 years, i know for A FACT that the 3.4l and 3.1/2.8 use a differnt pump, the part numbers are different. thats not to say a 2.8/3.1 pump wont work but the numbers are different for a reason.

D O H C do you happen to know the part number for the high press spring that you used in your 3.4 turbo?

[85_Olds_Ciera]

i know for A FACT that the 3.4l and 3.1/2.8 use a differnt pump

Here is what GM says:

High Volume Oil Pump

This heavy-duty cast iron oil pump has longer gears than a production V6/60º oil pump. It has 25% more capacity than a standard pump, and is highly recommended for all off-highway V6/60º Chevrolets. Small Image
Technical Notes: This unit does not include oil pump screen.

Question - Is 3.4L a V6/60º ?

[Joseph Upson]

I would be careful with increasing the volume and pressure of the oil flow above what is necessary for engine use. I know it's a hard rational to follow but recall the "to much or to little of a good thing" being bad.

Higher volumes and pressures cause more drag on the engine through the camshaft, costing horsepower and mileage. I installed a high volume pump in a small block and nearly twisted my wrist while manually priming the pump with a drill when the pressure suddenly rose to spec and the resistance nearly spun me around. I had no idea that kind of load was produced by the pump.

The same engine was doomed years later due to an oil leak, when using a high output pump (as warned about in texts) there is the danger of pumping a larger quantity of oil to the top of the engine nearly or possibly emptying the pan. In my case apparently the add 1 quart line became the danger line because of the added pumping capacity above stock resulting in much lower pan levels during high engine rpm. The engine developed a tap and later sent a rod through the block.

If you are not adding turbos or subjecting the engine to extreme conditions requiring it on a regular enough basis I would stick with the stock pump.

[d.o.h.c]

Ya, I can get the part number for you guys. It was the best thing I ever did. I also took my oil pump apart and in one of the gears I drilled a small hole. This helps the gears to get better lubrication . This all came out of the "How to rebuild your 60* v6" book.

[85_Olds_Ciera]

I would be careful with increasing the volume and pressure of the oil flow above what is necessary for engine use.

ON a rebuilt/new engine....no use the stock pump...on a high miler engine, yes if the oil pressure is down.

The pressure is controled via spring inside of pump...and their are different springs available....hence, if pump has 70 psi spring, it will never exceed 70 psi, which is the high side for 2.8 motors..

I have installed a higher volume pump before (actually, I had to build it) in a high miler vehicle...they work great in these applications.

Yes, one will take a HP/Fuel bite if installed on "tight engines."