Removal and installation of intake manifold, replacement of gasket

When removing and installing intake manifold, the mixture controller with air guide housing need not be removed.

Layout and shape of intake manifold have been changed starting from date of increased output. As a result, the following additional changes were made:

1.   Injection lines for cylinders 4—6.

2.  Control pressure line from fuel distributor to pressure damper.

3.  Control pressure line from warm—up compensator to pressure damper.

4.   Return line from warm-up compnesator to fuel distributor.

5.  Connection for idle air on air guide housing.

6.  Additional holder for supporting mixture controller.

7.   Holder for fastening pressure damper to intake manifold.

8.   Regulating lever.

9.  Air guide housing.

10.  Contour hose.

11.  Support for intake manifold.

12.   Rubber hose for full load enrichment

Installation: April 1978

Model

Starting chassis end No.

107.022

107.042

116.024/025

123.033

123.053

123.093

126.022/023

005201

004222

113919

039906 (035262) M

008540 (006171 )M

000021

Start of series

Righthand steering in England version.

14.2 lib—450/1 F2

Vent connection to intake manifold Engine 110.984/985/986

Connection has been changed for better distribution of vent vapors. This required a modification of contour hose.

After the former intake manifold has been used up, only the modified intake manifold together with contour hose will be available.

1st version

2nd version

Installation: September 1979

Model

Engine

Engine end No.

manual

transmission

automatic transmission

Chassis end No.

107.022 107.042

110.986

003146

007150

007614 006812

116.024 116.025

110.985

014021 069693

151315

123.033 123.053 123.093

110.984

019774

066923

064566 017098 004432

126.022 126.023

110.987

start of series

14.2 llb-450/2 F2

Idle air feed

The idle air feed now proceeds via 2 connections instead of the former central air intake.

Air distribution to the individual cylinders will be improved.

Smooth running of engine following a cold start is also improved by the said measure.

Installation: September 1981

Engine end No. Model          Engine manual

transmission

automatic transmission

Chassis end No.

Installation

mixed

Installation continuous

107.042 110.990

start of series

010107-011567 011569

123.007 123.033 123.053 123.093

110.988

start of series

085174-096468 096496 024129-024416 024417 010064-010252 010253

126.022 126.023

110.989

start of series

021381-043198 043199 039922-042786 042787

Removal

1    Remove air cleaner.

2    Drain coolant.

3    Unscrew all fuel and injection lines while catching fuel with a rag. Close fuel lines blind.

1 st version

4   Pull cable plug from mixture controller (if installed) and from cold start valve.

5   Disconnect connecting rod for longitudinal regulating shaft. On model 126, remove longitudinal regulating shaft (30-310).

6   Pull off vacuum line for automatic transmission and central locking system.

7    Unscrew cable strap for electric cable harness (cold start valve, warm-up compensator, safety switch).

2nd version

14.2 llb-450/3 F2

8   Remove heater hose from dashboard.

9   Pull off vacuum line for ignition timing.

10 Unscrew line for diagnosis plug.

11 Unscrew vacuum line for brake unit.

12 Remove decel shutoff valve.

3rd version

with decel shutoff

13   Pull off contour hoses after loosening hose clamp and leak line on idle air distributor.

14   On engines prior to increased output, unscrew control pressure line on diaphragm damper (105) and return flow line on warm-up compensator (70).

On model 126, unscrew high-pressure oil line for power steering pump.

15 Unscrew all fastening nuts and screws on intake manifold as well as on support.

14.2 Mb—450/4 F2

16    Unscrew both fastening screws for engine mounts and engine clamper. Lift engine with pitlift until intake manifold can be taken off.

On model 126, pull engine to the right and remove intake manifold.

17   Clean intake manifold and check flange faces with straightedge, refinish on surface plate, if required.

18    For installation proceed vice versa, using a new gasket.

Prior to tightening intake manifold, introduce return flow line from warm-up compensator.

19   Tighten fastening screws for engine mounts to 75 Nm.

20    Fill-in coolant.

21    Adjust regulating linkage (30-300). Check for easy operation.

22    Run engine, check fuel lines for leaks. Check intake system, fuel distributor and injection valves for leaks by spraying with Iso-Oktan or benzine.

23   Adjust idle speed (07.3-100).

14.2 llb-450/5 F2

Intake manifold

1st version

up to increased output

14.2 llb-450/6 F2

14.2 llb-450/7 F2