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| articles:m104_head_gasket_replacement [2024/02/29 06:32] – [Preparation] john5788 | articles:m104_head_gasket_replacement [2024/03/12 07:16] – john5788 | ||
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| ===== Preparation ===== | ===== Preparation ===== | ||
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| + | - Set engine position to TDC | ||
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| + | ===== Remove Front Cover, Belt, and Accessories ===== | ||
| + | - Remove false firewall | ||
| + | - Remove wire harness holder | ||
| + | - Remove valve cover | ||
| + | - Remove and disconnect smog pump / EGR switchover vacuum valve | ||
| + | - Remove fan clutch | ||
| + | - Remove accessory belt | ||
| + | - Remove smog pump | ||
| + | - Remove alternator | ||
| + | - Remove front lifting hook and coolant pipe | ||
| + | - Unplug camshaft advance solenoid and camshaft position sensor | ||
| + | - Remove heater pipe | ||
| + | - Disconnect hose clamp from auxiliary water pump hard line and pull hose off | ||
| + | - Remove 10mm screw from water pump | ||
| + | - Remove 5mm allen screw from idler pulley / fan bracket | ||
| + | - Remove belt idler pulley | ||
| + | - Remove 6x 13mm screws for front top timing cover | ||
| + | - Remove timing chain guide rail pin cover | ||
| + | - 5mm allen screw cover located at bottom right of the upper timing cover | ||
| + | - Use a slide hammer or a puller to remove the timing chain guide rail pin | ||
| + | - Pry upper front timing cover off. Avoid damaging the mating surface with prying tools. | ||
| + | - Remove chain tensioner | ||
| + | - Remove camshaft chain sprocket | ||
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| + | ===== Remove Exhaust Manifold ===== | ||
| + | - Remove smog pump / alternator bracket from engine block | ||
| + | - Remove EGR valve | ||
| + | - Disconnect pipe at rear | ||
| + | - Disconnect pipe at manifold | ||
| + | - Remove fasteners at flange and remove | ||
| + | - Disconnect both downpipes from exhaust manifolds underneath car | ||
| + | - Remove downpipes support clamp at transmission | ||
| + | - Remove copper self locking nuts securing exhaust manifolds to cylinder head | ||
| + | - Remove exhaust manifold | ||
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| + | ===== Remove Intake Manifold ===== | ||
| + | - Disconnect fuel injectors wire plugs | ||
| + | - Disconnect resonance flap wire plug | ||
| + | - Bleed pressure from fuel rail using test port schrader valve | ||
| + | - Disconnect fuel supply and fuel return hoses | ||
| + | - Remove 5 screws holding fuel rail to intake manifold | ||
| + | - Pull fuel rail off | ||
| + | - Remove remaining screws on intake manifold | ||
| + | - Loosen hose clamps connecting upper and lower manifolds | ||
| + | - Pull air intake away from cylinder head slightly | ||
| + | - Reach down between gap and disconnect knock sensor below cylinder 5 | ||
| + | - Remove air intake manifold | ||