Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
High Pressure Pump, Removing And Installing: Installing
-- Inspect the roller tappet for damage before installing and replace if necessary.
-- Insert the roller tappet into the vacuum pump as shown.
-- Rotate the crankshaft until the roller tappet is at the lowest point.
-- Coat the ball on the high pressure pipe with engine oil
-- Check the O-ring on the high pressure pump, and coat it lightly with clean engine oil.
-- Insert the high pressure pump in the vacuum pump. Pay attention to the high pressure pipe while doing so.
-- Tighten the bolts -arrows- one turn from side to side until the flange on the high pressure pump contacts the vacuum pump.
-- Tighten the bolts to the tightening specification. Refer to OVERVIEW - HIGH PRESSURE PUMPΒ for the tightening specification.
-- Tighten the union nut on the high pressure pipe hand-tight.
-- Install the pipe clamp -arrow- and tighten to 5 Nm.
-- Counterhold at the hex fitting and tighten the union nut -2-.
-- Check the tightening specification after at least one minute.
-- Attach the fuel hose -3- and secure with the spring clamps.
-- Connect the connector -4- to the Fuel Pressure Regulator Valve -N276-.
Further assembly is performed in the reverse order of the removal.
After completing all procedures, start the engine and check the fuel system for leaks.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.