Category: oil filter

Rear Main Seal

Rear main seal 12279-5L310

The rear main seals really don’t go bad that often. When/if you are doing the clutch, replace the rear main seal. It is just a good practice.  Also replace the pilot bearing/bushing. You don’t have to, but as long as you are there.   12279-5L310

Oil coating the inlet pipe to the rear turbo, RB26

The turbos have supply and drains.  Each supply has several areas it can leak.  Each drain has several areas it can leak. Since this is the hot side of the engine, a leak here can flash into a fire. Be very cautious of any leaks on this side of the engine.

The rear turbo is hooked to the PCV or positive crankcase ventilation system. It is sucking in air from the exhaust side cam cover, and since they are hooked together, both cam covers. This oil will often pool in the inlet side to the rear turbo.   The RB26 whips up a lot of oil, or aerates

Oil Cooler


The OEM oil/water heat exchanger or oil cooler has the oil temperature sender, and the oil pressure sender in it. We have seen it leak from here.

Rear Main Seal

Rear main seal 12279-5L310

The rear main seals really don’t go bad that often. When/if you are doing the clutch, replace the rear main seal. It is just a good practice.  Also replace the pilot bearing/bushing. You don’t have to, but as long as you are there.   12279-5L310

Oil coating the inlet pipe to the rear turbo, RB26

The turbos have supply and drains.  Each supply has several areas it can leak.  Each drain has several areas it can leak. Since this is the hot side of the engine, a leak here can flash into a fire. Be very cautious of any leaks on this side of the engine.

The rear turbo is hooked to the PCV or positive crankcase ventilation system. It is sucking in air from the exhaust side cam cover, and since they are hooked together, both cam covers. This oil will often pool in the inlet side to the rear turbo.   The RB26 whips up a lot of oil, or aerates

Oil Cooler


The OEM oil/water heat exchanger or oil cooler has the oil temperature sender, and the oil pressure sender in it. We have seen it leak from here.

Rear Main Seal

Rear main seal 12279-5L310

The rear main seals really don’t go bad that often. When/if you are doing the clutch, replace the rear main seal. It is just a good practice.  Also replace the pilot bearing/bushing. You don’t have to, but as long as you are there.   12279-5L310

Oil coating the inlet pipe to the rear turbo, RB26

The turbos have supply and drains.  Each supply has several areas it can leak.  Each drain has several areas it can leak. Since this is the hot side of the engine, a leak here can flash into a fire. Be very cautious of any leaks on this side of the engine.

The rear turbo is hooked to the PCV or positive crankcase ventilation system. It is sucking in air from the exhaust side cam cover, and since they are hooked together, both cam covers. This oil will often pool in the inlet side to the rear turbo.   The RB26 whips up a lot of oil, or aerates

Oil Cooler


The OEM oil/water heat exchanger or oil cooler has the oil temperature sender, and the oil pressure sender in it. We have seen it leak from here.