DLLA155P180 Diesel Injector Nozzle — Focused Fuel For WEICHAI WD615 Howo / Foton / Steyr Trucks

If your WD615-powered truck starts clean when cold but leaves a light black trail under load, or fuel consumption is creeping up even though the engine still feels "OK", the answer is often right at the injector tip. The DLLA155P180 injector nozzle (Bosch ref. F 019 121 180 / F019121180) is a precision multi-hole nozzle widely listed for WEICHAI WD615.46 / WD615.47 / WD615.69 engines used in Howo, Foton and Steyr heavy trucks.Alibaba+3Bascolin+3eBay+3

This is the business end of the fuel system: the component that turns high-pressure diesel into a fine cone of mist the piston can actually burn.

 

 

Most professional catalogs group the following numbers together:

Nozzle stamping: DLLA155P180 

Bosch number: F 019 121 180 (F019121180)  

WEICHAI WD615.46 / WD615.47 / WD615.69

Howo / Foton trucks, Steyr WD615.46 engine family  

Common offer format: Sold as 4–6 pcs sets "for WEI CHAI WD615.46 / HOWO WD615.69" 

If your old nozzle is engraved DLLA155P180 or your parts book lists F 019 121 180 for a WD615 truck engine, you're in the right place.

 

 

Instead of vague "more power" claims, here's what changes in daily operation:

✔ Cleaner combustion & less smoke
The DLLA155P180 uses a 155° spray-angle, multi-hole design matched to the WD615 combustion bowl. Correct cone geometry plus fine droplets means diesel burns more completely, cutting:

Black puff on take-off

Haze when climbing in a high gear

Soot load on the turbo and exhaust pathe 

✔ Stronger low-rpm pull
Worn or carbon-scarred nozzles distort the pattern so some cylinders run rich, others lean. With a fresh matched set of DLLA155P180 nozzles, cylinder pressure evens out and the truck feels more willing in the 1,300–1,900 rpm band where WD615 engines really work.

✔ More predictable fuel burn
Better atomization means less fuel wasted as unburned hydrocarbons. Over a month of city runs or site haulage, that shows up as smoother consumption figures and fewer complaints from the smoke inspector.

 

 

Suppliers emphasise robust build for harsh truck duty:

Material: Hardened, high-speed steel or equivalent alloy for wear and fatigue resistance under repeated high-pressure shots 

Manufacture: Precision-ground body with EDM-machined spray holes to keep flow and cone angle inside Bosch tolerance

Fuel type: Diesel (mechanical pump / rail-type injector use, depending on system design) 

Condition: 100% brand-new nozzles, often with 6–12 month warranty from reputable sellers and individually capped to protect the tip in transit.  

You can describe it simply on your site as:

"New DLLA155P180 / F019121180 multi-hole diesel injector nozzle for Weichai WD615.46 / WD615.69 engines (Howo, Foton, Steyr truck applications)."

 

 

Howo dump / mixer trucks with WEICHAI WD615 engines that show dark smoke on throttle or uneven idle

Foton and Steyr highway tractors needing a mid-life injector refresh without buying complete new injectors

Fleet overhauls where the workshop wants to rebuild injectors in-house - new DLLA155P180 tips plus pop-testing is often more economical than full replacement

 

 

You don't need a full manual in the listing, but a short "how it's used" block builds confidence:

Confirm the nozzle is the problem
Run a pop-test and spray-pattern check or a cylinder cut-out test. Look for delayed opening, dribbling, or distorted cones.

Strip & clean the injector
Work on a clean bench. Remove old DLLA155P180 nozzle, clean the body and cap nut, and remove carbon carefully from the sealing faces.

Install the new nozzle
Fit the new DLLA155P180 / F019121180 nozzle, assemble with correct shim stack, and torque the cap nut to spec so the body isn't distorted.

Calibrate
Pop-test each injector; adjust shims so opening pressure matches the engine spec and is balanced across the set.

Refit & road-test
After bleeding the fuel system, check for easier starts, smoother idle and reduced smoke under real working load.

 

You can mix several of these into titles and bullets to match real searches:

"DLLA155P180 injector nozzle for Weichai WD615.46 / WD615.69" 

"F 019 121 180 diesel nozzle for Howo / Foton / Steyr trucks"  

"DLLA155P180 F019121180 fuel injector nozzle replacement"

 

 

 

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