Porsche 911 Stock Heat Exchanger
Description
Thermoswitch
Beginning with 1974 models, engines equipped with the continuous injection system (K Jetronic Engines Porsche 911 Guide" href="/porsche-911-guide/pistons-for-k-jetronic-engines.html">K-Jetronic) are furnished with a thermoswitch which is connected to the cold start enrichment valve. The thermoswitch is located in the left chain housing cover. A microswitch is connected in series with it. The microswitch is activated by the hand throttle lever when the latter is moved to at least 5° of the throttle valve position. The is active up to engine temperature of approx. + 45° C (113° F) and prevents the injection of supplemental fuel by the cold start enrichment valve when starting a hot engine.
Vacuum controlled warm-up regulator pressure changes of this warm-up regulator are made via intake manifold vacuum.
BEGINNING WITH 1974 M Ot) ELS
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1 Air duct
2 Control pressure regulator (throttle valve position)
3 Throttle valve
4 Cold start enrichment valve
5 Control pressure regulator (warm running compensation)
6 Heat exchanger
7 Crankshaft
8 Oil pump
9 Oil screen
10 Connecting rod
11 Piston
12 Cylinder
13 Exhaust valve
14 Valve guide
15 Oil hose connection (oil tank - oil pump)
16 Valve spring
17 Rocker arm shaft
18 Camshaft
19 Rocker arm
20 Intake valve
21 Injection valve
22 Intake pipe ^
23 Intake housing £
24 Air sensor plate
25 Mixture control unit H
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