Over the last couple years the priorities in my life have changed. Had Matrix Garage grown big enough to hire enough employees and leave them to running it while I pursued other things I would have happily taken that route but it has generally stayed just big enough to keep me working overtime. 
I have decided to start focusing my carreer and passions elsewhere and that means that supporting the AW, AE, 4A and related communities has had to be moved much lower on the priority list. I have decided to keep the store up to provide parts that only we offer, or other things that are hard to come by elsewhere. You will notice many big name, readily available products have been taken down and we will continue to do so. It's just not worth our time trying to compete with the big corporations selling at cutthroat prices and it just takes up more of my time. 
I will try to keep providing those parts that we make or that we have developed and sell as a service to the community but understand that now this is something I do in my spare time because I don't want to leave people hanging. 
I try to make shipments and process orders at least twice a week. If you want Amazon next day shipping buy from Amazon. I will do my best to keep order time and customer service at a reasonable level but have some understanding. I am not making money on this and it takes away from my other work and other issues that are very important to me right now. 
I have always wanted to make our designs and other information open source and available to the community but to do so properly would take a lot of time making sure that models and drawings were complete, accurate, or properly described. To go through everything and make sure it was something that I felt comfortable releasing to the community. I would love to find someone who was willing to help me do this. Someone in engineering school or passionate about this to help go through 3D scans, CAD designs, and information to prepare it. If you are interested feel free to email me. 




Understanding 4AGE oil pump differences and install prep

There have been a lot of theories and rumors over the years about oil pumps and gear size. I will try to explain to the best of my knowledge and ability.

There were at least three primary revisions of the 4AGE oil pump gear though there may have been more subtle changes over the years.

The first gear was a square tooth design.


That was replaced by a round tooth design.

The first round tooth gear was approximately 7.5mm thick.

This is also identical to the gear found in the 7AFE oil pump.


This was later replaced with a third revision that had a thicker gear that is approximately 9.5mm

This pump having the same gear profile and being 22% thicker will move 22% more volume. This is great especially for high performance motors using looser bearing tolerances and needing more volume.

For a long time there were rumors that only the Toyota pumps had the thicker gears. This is not true.
We only get Aisin oil pumps and know for sure that modern Aisin pumps use the later gear. We are not sure about other manufacturers pumps though.
It is however hard to know for sure you are getting the later revision gear. They share the same part number so it could be possible to get a part that has been sitting on a shelf for decades that is the old style.

For this reason we offer the option to inspect your pump before it's shipped to make sure you are getting the later high volume pump.
We will also grease it up with assembly lube so it's ready to install when you get it.
You can get an Aisin pump here and there is the option to get it inspected when you order.

This procedure may void AIsins Warranty. That is your risk, not ours.
If there is anything that is obviously related to the service we will do what we can to resolve the situation.


You can also inspect and lube up the pump yourself. Using grease or assembly lube is recommended any time you install a new pump. This keeps it from galling up on first startup and also helps the pump prime sooner.
To inspect and lube the pump first remove the front cover and take the gears out. Measure the pump gears as shown in the picture above. If the gear measures just under 9.5mm you have the later gear.
Next clean the entire pump. Make sure the gear housing is spotless. Apply grease or assembly lube to all surfaces that contact the gear and also a dab at the inlet ramp.


Install the inner and outer gear then smear some grease inbetween the teeth and then spin it by hand a few times to spread the grease in the gears.


Apply some grease to the cover where it contacts the gear and add a small dab at the inlet ramp.


Put the cover back on

Torque the bolts in a star pattern first to 66 in lb (7.5 NM) and then to 100 in lb (11.2 NM). Then I do a pass clockwise or counterclockwise at the same torque just to make sure they are all good.
Now your pump is ready to install.



The stock sintered gears have been known to fail if they spend extended periods over 8500 RPM. For high RPM builds you should install the Toda oil pump gear.

This gear fits the later high volume pumps.

courtesy of