Engine , remove and install

# Engine, remove and install. S14

Remove battery negative lead. |
Remove gear box. |
Remove splash shield from below front of engine. |
Drain coolant from cylinder block drain plug on right side of block, behind exhaust manifold and radiator drain plug on lower left corner, or center, of radiator. |  |
Loosen clamp on intake hose at airflow meter (yellow arrow). Disconnect altitude sensor and air flow meter (blue arrows). Loosen two 10mm nuts retaining air filter housing (green arrows) and remove the assembly. |
Loosen clamp on intake boot, remove wiring from clips on boot and remove from air box. |
Disconnect accelerator cable and cruise cable if fitted, by squeezing plastic tabs together and pulling retainer from bracket (blue arrow). Remove nuts (green arrows) holding cable bracket to intake air box. Place cables, still in bracket, aside. |
Remove vacuum hose to brake booster from intake manifold (blue arrow), remove nut clamping hose to intake manifold (green arrow) and move hose aside. |
Remove hose from fitting on bottom of air box (yellow arrow). Remove 13mm nut on brace below air box (green arrow). |
Remove hose from front of intake manifold beside number 1 throttle body. Remove nuts attaching air box to throttle bodies, remove air box. |  |
Remove leads from rear of alternator (green arrows), remove nuts retaining wiring harness (yellow arrows) to alternator and move harness aside. |
Remove all three leads from the starter. 8,10, and 13mm nuts. |
Disconnect oil pressure and temp senders on oil filter housing, remove harness from mounting clips. |
Pull off vacuum line from junction between numbers 1 and 2 throttle bodies and pull through hole in intake brace. Disconnect plug and forward hose from idle valve. Disconnect other idle valve hose from fitting between numbers 3 and 4 throttle bodies and remove idle valve. Remove engine harness from holder located behind idle valve position. |
Lever up injector harness, disconnect idle valve extension harness (green arrow) and place aside. |
Disconnect throttle position sensor. |
Remove two 10mm bolts securing fuel rail to manifold (one pictured, green arrow) and pull injectors out of manifold. Remove vacuum line (yellow arrow) from fuel pressure regulator and disentangle injector harness from fuel rail. Move harness aside. |
Remove purge hose from left rear corner of manifold (for clearance only, no need to remove lower end of hose), remove fuel hoses from rail below purge hose, mark hoses, car will not run if they are reversed on installation, and remove heater hose from rear of cylinder head. |
Remove nut retaining engine harness to number 4 throttle body. Pull entire engine wiring harness away from engine. |
Remove heater hose from metal pipe below number 4 throttle body. |
Loosen clamp on carbon canister and move it aside, no need to remove hose from canister. |
Remove both oil cooler lines from oil filter housing. |
Hold water pump pulley (green arrow) with BMW special tool 11 5 030, or by a large set of "water pump" pliers. Remove fan (yellow arrow) with BMW special tool 11 5 040 or similar slim 32mm wrench. |
An alternative to using pliers is to install the wrench and strike wrench sharply with a hammer in a clockwise direction.
CAUTION: Left hand thread, turn wrench as if to tighten a regular bolt, to remove the fan.
Remove coolant hoses. |
Remove bolt from top edge of radiator. |
Lift out radiator.
Remove ground lead from oil pan. |
Remove power steering pump from bracket, no need to detach lines, and hold to the side with wire or string.
Remove supply and return and bypass hoses from coolant reservoir. |
Remove ground strap from rear cam box cover. |
Unplug oxygen sensor connector below coolant reservoir. |
Remove coil wire from coil, unplug temp sensors on coolant manifold on right side of engine, near oil fill cap. Remove 10mm nut retaining harness to distributor housing. |
Remove upper radiator hose completely and remove thermostat hose from coolant manifold at right side of engine. |
Remove harness from support across front of head. |
Remove A/C compressor from bracket, no need to disconnect refrigerant lines, tie to the side with wire.
Disconnect hood support and prop hood in the vertical position with BMW special tool 51 2 120 or equivalent. Hood can be removed if more clearance is required.
Locate engine mounts on front sub-frame, remove nuts from top of left mount and bottom of right mount. Loosen the nuts, but do not remove, on bottom of left mount and top of right mount.
Lift out engine. |

### Torques

Engine mounts | : | 45 Nm (32.5 ft lbs.)
Oil cooler lines | : | 35 Nm (25 ft lbs.)
Intake air box | : | 9 Nm (6.5 ft lbs.)

E30 M3 Repair Manual V2.7. Copyright ©1999-2001 Koala Motorsport & Brett Anderson