The Stanadyne 38416 is a new, genuine Stanadyne pencil injector with a rate-shaping nozzle (RSN). It fits John Deere PowerTech 4.5 L and 6.8 L engines: the turbocharged 4045T and 6068T and the turbocharged, air-to-air aftercooled 4045H and 6068H, including engines with the Stanadyne DE10 electronic pump. John Deere sells it as RE531436, which replaced RE507766. It carries a blue color code. You need four for a 4045 and six for a 6068.

How it differs from the Stanadyne 29279 (John Deere RE48786, pink): the 29279 is John Deere’s conventional pencil nozzle for these turbo engines, and the 38416 is a rate-shaping nozzle. John Deere uses rate-shaping nozzles on Tier 2 certified 4.5 L and 6.8 L engines to meet emission rules, and sets them to a lower opening pressure than the RE48786. John Deere lists both on some of the same engine models, so match the number on your old injectors and never mix the two types in one engine. Pencil injectors are replaced for hard starting, smoke, rough running, misfire or leaks past the carbon stop seal.

Specifications

Fits / Applications

• John Deere 4045T 4.5 L turbocharged PowerTech engines built with rate-shaping nozzles
• John Deere 4045H 4.5 L turbocharged, air-to-air aftercooled PowerTech engines built with rate-shaping nozzles
• John Deere 6068T 6.8 L turbocharged PowerTech engines built with rate-shaping nozzles
• John Deere 6068H 6.8 L turbocharged, air-to-air aftercooled PowerTech engines built with rate-shaping nozzles

Every time a pencil nozzle comes out, fit a new carbon stop seal and a new seal washer (John Deere uses the JD258 seal installer), clean the bore and seat, and replace brittle leak-off grommets. John Deere torques the hold-down clamp cap screw to 40 Nm (30 lb-ft) and the leak-off line nuts to only 5 Nm (44 lb-in) on these engines. John Deere’s opening pressure setting for a new rate-shaping nozzle (Tier 2 certified engines) is 244 to 249 bar (3,540 to 3,620 psi), with no more than 7 bar (100 psi) between cylinders. A rate-shaping nozzle may not chatter on a pop tester; John Deere passes it if opening pressure, seat leakage and return fuel are in spec.

Part Numbers & Cross Reference

John Deere RE531436  ·  John Deere (earlier) RE507766  ·  John Deere (SE number) SE501103  ·  John Deere (SE number) SE500830  ·  John Deere (SE number) SE500831

Cross-reference numbers can change with engine serial, build year and emissions tier, so treat this list as a starting point. Send us your engine serial number and we will confirm the exact match against your build before anything ships. That check is free and takes a few minutes.

Frequently Asked Questions

What is the difference between Stanadyne 38416 and 29279?

The 29279 (John Deere RE48786, pink) is the conventional pencil nozzle for these turbo engines. The 38416 (blue) is a rate-shaping nozzle, used on Tier 2 certified 4.5 L and 6.8 L engines and set to a lower opening pressure. Never mix the two types in one engine.

What John Deere number is Stanadyne 38416, and how many does an engine take?

John Deere sells it as RE531436, which replaced RE507766. The SE numbers are SE501103, SE500830 and SE500831. You need four for a 4045 and six for a 6068.

A new 38416 does not chatter on the pop tester. Is it bad?

Not on that alone. A rate-shaping nozzle may not chatter on a pop tester; John Deere passes it if opening pressure, seat leakage and return fuel are in spec. John Deere’s opening pressure setting for a new rate-shaping nozzle is 244 to 249 bar (3,540 to 3,620 psi).

Is 38416 new, and how do I confirm it fits my 4045T or 6068H?

It is a new, genuine Stanadyne injector in original packaging, sold outright with no core charge and nothing to send back. Call 530-668-0818 with the number stamped on your old injectors, or the engine model code and serial number from the engine tag, and we confirm the match at no charge.

Related Parts

• John Deere 4045H/T & 6068H/T Pencil Fuel Injector | Stanadyne 29279 New (RE48786)
• John Deere 6068T & 6068D 6.8L DE10 Fuel Injection Pump | Stanadyne 06320 New (RE568067)
• Stanadyne 06322 New Injection Pump | John Deere 4045D & 4045T (DE2435-6322)
• Stanadyne 06323 New Injection Pump | John Deere 4045H (DE2435-6323)

Why Buy From Valley Fuel Injection

We are a diesel fuel-injection and turbocharger shop in Woodland, CA, rebuilding pumps, injectors and turbos on our own benches since 1993, not a drop-ship storefront. When you call, you talk to the people who test these units. Confirm fitment against your engine serial, VIN or build date before you order. Call us and we will help you match the right part.