Oil Pump Priming

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Page created by T Apr 9th 2009:

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Cutaway Red Six.  Click to Enlargen. Photo by Qute.
 

Oil Pump Priming:

The Need For Priming:

Because Holden Red, Blue and Black 6 Cylinder and V8 Engines have the Oil Pump mounted above the Oil Level in the Sump, they will not draw Oil properly unless they already have Oil in them.  Oil inside the Pump closes up the Gap between the Gears and forms a proper Seal.  If the Pump hasn't been primed you will need to Oil it internally before it will work properly.

New and Reconditioned Engines:

An Engine that is new or has been recently reconditioned may have had the Oil Pump pre-primed by the Engine builder. Consulting them about this may avoid the need to prime the Oil Pump.If it hasn't been primed, this will need to be done before any Start is attempted.

Oil Pump Replacement:

Any time a new Oil Pump is fitted to a Red, Blue and Black Holden Engine, the Oil Pump will need to be Primed.
Holden 161 engine as originally used in HD Holdens. Click to Enlargen. Photo by Qute.

Startup:

During startup of any Engine, the Oil Pressure must come up to normal within about 30 seconds. The Driver should monitor the Oil Pressure Gauge or Oil Pressure Light to make sure this happens.If the Oil Pressure doesn't come up to a normal reading within about 30 seconds, the Engine should be shut down and the cause of failure investigated.
Dissembled Red Six Oil Pump. The clearance around the Gears needs to be filled with Oil to make it work properly. In its present state this Pump couldn't draw breath. Click to Enlargen. Photo by Jacks.

Oil Pressure Indicator:

Whether your Dash has an Oil Pressure Light or an Oil Pressure Gauge it is wisest to make sure these work before Starting a new Engine. Short the Sender Wire to the Engine Block with the Ignition on and the Engine stopped. The Light should glow or the Gauge should read maximum. No response at all is undesirable and must be fixed.The Oil Light should come on when the Ignition is set to on,  the Engine is stopped and the Sender Wire  is correctly connected to the Sender.The Oil Pressure Gauge will read 0 when the Ignition is set to on, the Engine is stopped and when Sender Wire is correctly connected to the Sender.

Red, Blue and Black Holden Engines:

All Holden Red, Blue and Black 6 Cylinder and V8 Engines *must* have the Oil Pump primed before the first startup or there will be no Oil fed to the Bearings and other moving parts.As said, above this may already have been done by the Engine Builder 

Holden Grey Motors:

Grey Motors have the Oil Pump at the bottom of the sump so they automatically prime themselves. Engine Oil is forced into the Pump when the Sump is filled.

Priming Red, Blue and Black 6 Cylinder Engines:

The Oil Filter should be filled with Oil before fitting it to the Oil Pump. This shortens the time it takes for the Oil Pressure to reach normal. There are a number of ways to Prime these Engines.1. Remove the Oil Pump from the Engine and pour Oil into it all the holes until drag can be felt when rotating the Gear.Refit the Oil Pump to the Engine. There is no need to take the Pump apart to prime it.or   2. Remove the Oil Pressure Sender and squirt Oil into the Hole until Oil begins to flow out.Starting these Engines is the only way to make these Engines prime. The Oil Pressure Red, Blue or Black 6 Cylinder Engines  will not come up by Cranking on the Starter alone. The Engine *must be started.   It will take up to 30 seconds for the Oil Pressure to become normal once the Engine has started and is left to idle.
It's not wise to let the Engine run too long without Oil Pressure so if the Oil Pressure doesn't come up within 30 seconds turn it off and investigate.

Priming Red, Blue and Black V8 Engines:

Follow any manufacturer or any Engine builder's recommendation to preserve warranty.Otherwise, remove the Oil Pump and flood it with Engine Oil. Refit the Pump. Fill the Oil Filter with Oil before fitting it to the Oil Pump. It's not wise to turn the Engine over or let it run too long without Oil Pressure so if the Oil Pressure doesn't come up within 30 seconds turn it off and investigate.

Chev V8 Oil Priming:

Chev V8 Oil Pump Priming Tool and use.
Chev V8 Oil Pump Priming Tool. Made from an old Distributor Shaft to block off critical Oil Gallery. Photo by HPEngines. Click to Enlargen.

Vacuum Priming:

An old powerboat racer told me he always followed this method when starting a new motor. Put a hose fitting in the oil sender hole and then connect a clear fuel line hose from the fitting to the PCV or brake fitting on the inlet manifold. He then turned the motor over and as soon as he saw oil in the line he knew that the pump was primed, as the manifold vacuum had sucked the oil through the pump. You have to stop turning it over a soon as you see oil in the line or you will get oil in your manifold. Take the fitting and hose off and put your oil sender back in.
Costs about $5 for the fitting and hose and saves a lot of stress and possible damage.
David

Links:

HPEngines' Shed

Chev V8 Oil Pump Priming

Jacks Shed

Terms:

Terms

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