Denso Common Rail Injector Comprehensive Overhaul Kit – Complete Seal, Gasket & Filter Set For 095000 Series (G2/G3/G4) – One Box, Zero Guesswork

Every Denso common‑rail injector contains between 12 and 18 sealing points – O‑rings, back‑up rings, copper washers, filter screens, and gaskets. Each component has a specific durometer, compression set resistance, and dimensional tolerance that varies across injector generations. Ordering separate parts from different suppliers introduces three risks: incorrect material grade (e.g., nitrile instead of FKM for biodiesel compatibility), wrong cross‑section diameter (2.0 mm vs 2.2 mm causing extrusion), and missing the critical backup ring that prevents O‑ring spiralling under pressure. Our comprehensive overhaul kit consolidates every sealing element for Denso G2, G3, and G4 injectors into a single, colour‑coded box. Each part is pre‑verified against Bosch DCI‑700 test bench data to ensure that after reassembly, the injector's static leakage and dynamic flow drift remain within 2% of new‑unit specifications – eliminating the "five parts from five suppliers" chaos that plagues independent workshops.

✔ All FKM materials are rated for fuel temperatures from –40°C to +200°C and are compatible with B20 biodiesel, HVO, and low‑sulphur diesel. The PTFE back‑up ring prevents extrusion at rail pressures above 1,600 bar – a common failure point when using only a single O‑ring without support.

Denso injectors operate with fuel pressures that can spike to 2,000 bar during injection events. The sealing elements experience both cyclic compression and high‑velocity fuel flow that can erode softer materials. Our kit uses:

FKM (fluoroelastomer) with a 75 Shore A base – offers 30% better compression set resistance than standard nitrile, maintaining its shape after 10,000 pressure cycles.

PTFE back‑up rings – reduce O‑ring extrusion by acting as a rigid barrier; they also have a low coefficient of friction, allowing the O‑ring to slide without rolling during assembly.

Annealed copper washers – ensure uniform crush deformation (target 0.15 mm reduction) to compensate for cylinder head surface irregularities, providing a leak‑proof seal even if the head bore has minor scoring.

The filter screen is woven from 304 stainless steel with a 30‑micron absolute rating – fine enough to trap abrasive particles without restricting return flow. We've seen workshops reuse old screens, only to have debris block the control valve, leading to rail pressure spikes. This kit includes new screens for every injector.

Q1: Does this kit include the large copper sealing washer that goes between the injector and the cylinder head?
Yes – we include eight annealed copper washers, sized for G2 (1.2 mm thick) and G4 (1.0 mm thick) separately. The G3 uses the same 1.2 mm version as G2. The kit also includes a washer thickness gauge to confirm correct fitment for your specific engine head recess depth.

Q2: Can I use these seals with biodiesel blends above B20 (e.g., B30 or B100)?
All FKM components in this kit are B100‑compatible up to 200°C, according to our material certification. The PTFE rings are inert. However, for B100, we recommend reducing the service interval to 50,000 km, as higher viscosity may accelerate filter screen clogging – but the seals themselves will not degrade.

Q3: What is the shelf life of the O‑rings and lubricant in the unopened kit?
The FKM O‑rings have a shelf life of 5 years when stored at 15‑25°C in the sealed pouch. The lubricant sachet is valid for 3 years – check the expiry date printed on the box. We recommend using within 2 years for best results.

Q4: I have a Denso injector that does not appear in your model list – will this kit work?
This kit covers most 095000 series G2/G3/G4 injectors with common physical dimensions. However, some special variants (e.g., 095000‑7200 for Volvo) use a different nozzle O‑ring size. We offer a compatibility check – simply send us your injector's part number and we will confirm; if not covered, we can supply a custom kit.

Q5: How do I know which generation (G2/G3/G4) my injector belongs to?
The injector body has a stamped code – G2 units usually have a silver solenoid cover, G3 have a black plastic cap, and G4 have a shorter body and a different electrical connector. Our laminated identification chart (included) shows clear visual differences with images, so you can match within seconds.

Q6: Is the filter screen included for both the inlet and return sides?
Denso injectors typically have a filter only on the return (low‑pressure) side. The high‑pressure inlet filter is integrated into the injector body and is not replaceable – you must flush the body. Our kit includes the return‑side filters, which are the most common to clog. We also include an extra set of two inlet‑screen cleaning brushes (in the kit) to clear debris without disassembly.

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