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articles:m104_hfm_intake_rebuild [2020/11/19 08:44] – john5788 | articles:m104_hfm_intake_rebuild [2020/11/21 07:50] (current) – john5788 | ||
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- | ===== Procedure | + | ===== Remove air intake pipe ===== |
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+ | - Unclip retaining hooks at air box behind right headlight and remove upper lid | ||
+ | - Unplug both sensors along the intake pipe | ||
+ | - Remove valve cover screws | ||
+ | - Loosen upper hose clamp at throttle body boot | ||
+ | - Pull up on air intake pipe and remove | ||
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- | ==== Remove | + | ===== Remove |
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+ | - Remove black plastic engine wiring harness cover | ||
+ | - Remove fuel pressure bleed cap located towards the center of the fuel rail | ||
+ | - Bleed excess fuel pressure by pressing schrader valve with a tool like a small screwdriver and replace the cap | ||
+ | - Disconnect fuel inlet and return hoses from fuel rail | ||
+ | - Make note of which hose goes where | ||
+ | - Remove fuel pressure regulator vacuum line | ||
+ | - Unbolt dipstick for clearance by removing 5mm allen bolt | ||
+ | - Unplug fuel injectors from engine harness by pinching connectors and pulling | ||
+ | - Metal clips may not bend all the way and a thin screwdriver can be used to gently bend the metal clips for clearance | ||
+ | - Unbolt fuel rail and pull to remove. There are 5x 6mm allen bolts holding it in place. | ||
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- | ==== Remove | + | < |
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- | ==== Remove intake manifold ==== | + | ===== Remove intake manifold ===== |
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+ | - Unbolt remaining bolts holding intake manifold to cylinder head | ||
+ | - Loosen both hose clamps connecting the upper and lower intake manifolds together. Located underneath the upper intake manifold | ||
+ | - Disconnect wire to resonator flap | ||
+ | - Disconnect air hoses near oil dipstick mounting bracket | ||
+ | - Lift up and remove air intake manifold | ||
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- | ==== Rebuild ==== | + | ===== Rebuild ===== |
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+ | - Replace all vacuum lines | ||
+ | - Clean parts | ||
+ | - Intake manifold seat on cylinder head | ||
+ | - Intake manifold | ||
+ | - Throttle body boot if not replacing | ||
+ | - Intake boots if not replacing | ||
+ | - Parts to replace | ||
+ | - Intake manifold gaskets (104 141 1080, requires 6) | ||
+ | - Long lower intake hose (104 094 35 82) | ||
+ | - Short lower intake hose (104 094 36 82) | ||
+ | - Fuel injector seal (019 997 13 48, requires 12) | ||
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