YD25 D22 D40 R51 IMPROVED OIL PUMP

YD25 D22 D40 R51 IMPROVED OIL PUMP GEARS

Oil pump inner gear        Oil pump gear set 
 Original & Upgraded Oil Pump Gears   YD25 Oil Pump Gear Set

 

The first photo shows two oil pump inner gears, the first is the OE part and the second is our upgraded gear. Our inner oil pump gear has a double shoulder which makes it thicker through the bore. This provides more drive surface area which decreases wear on the harmonic balancer and the inner gear.

The second photo shows our upgraded oil pump gear set. Our oil pump gears are manufactured locally in Geebung, Brisbane using Boler Calmax steel alloy. Calmax has the following properties: free marching; non galling; hardened by heat treatment; and, stable during hardening. The outer gears are partially machined then hardened to 45 HRC. The inner gears are fully machined and hardened to 48 - 52 HRC. The outer gears are toleranced machined and manually paired with the inner gears.

Our oil pump gears are fitted to new oil pump housings. As the gears are larger than the OE part, the new oil pump housings are machined to suit our matched gear pairs. This process achieves precision tolerances which are individually measured and recorded on a quality assurance certification for each pump.

 

D22 OIL PUMP REMOVAL AND DESIGN ISSUES

YD25 D22 ORIGINAL OIL PUMP    YD25 D22 improved oil pump
   
   
   
   
    

 
 D22 ORIGINAL OIL PUMP   YD25 D22 IMPROVED OIL PUMP    

 

With a standard D22 engine the sump must be removed to allow the lower oil pump timing cover removal. The first photo shows the oil pump rear cover protruding into the sump. Click on photo for better view. This is why the D22 sump must be removed first.

The second photo shows the oil pump with our new oil pump cover kit installed. Click on photo for better view. With our oil pump cover kit fitted the oil pump lower timing cover can be removed without removing the sump. Oil pumps do wear so if you are fitting one of our timing chain kits, consider this oil pump cover conversion as it will save a days labour in the workshop should the oil pump need replacing at a later date.

 OIL PUMP COMPONENTS WE SUPPLY

 YD25 D22 improved oil pump rear cover   YD25 D22 IMPROVED OIL PUMP2
   
   
   
   
    
 YD25 D40 R51 IMPROVED OIL PUMP
 YD25 D22 OIL PUMP COVER KIT
  YD25 D22 IMPROVED OIL PUMP  

YD25 D40 R51 IMPROVED OIL PUMP 

 
The first photo shows our D22 oil pump rear cover kit. The second photo shows our complete D22 improved oil pump with our gears, pump cover kit and oil sprayer fitted.
The third photo shows our complete D40 R51 improved oil pump with our gears and oil sprayer fitted.

D40 R51 HARMONIC BALANCERS

Harmonic balancers do wear. We stock harmonic balancers.  

 

Last updated 23 May 2016