I know this is another very basic job, but this one could be seen as the sequal to the Idle Control Valve how to
Function / Purpose
The purpose of the Crankshaft Sensor (CS) is to monitor the position or rotational speed of the crankshaft. This information is used by engine management systems to control ignition system timing and other engine parameters. Before electronic crank sensors were available, the distributor would have to be manually adjusted to a timing mark on the engine.
Crank sensors in engines usually consist of magnets and an inductive coil, or they may be based on magnetically triggered Hall effect semiconductor devices. Common mounting locations include the main crank pulley, the flywheel, and occasionally on the crankshaft itself.
Reasons for Cleaning
Over time, the CS can become clogged with dirt and so impedes its ability to function as required. It has been said to members of the forum by mechanics and RAC that this is a ‘weak part’ on Renault engines and so is directly relevant to us.
Things you will need
Flat head screw driver
11mm socket with LONG (20cm) extension
Thin fingers
Steal Wool + old toothbrush
A wee tub oh hot soapy water
Disposable gloves (optional, but worth it!)
Estimated time (excluding cleaning time)
Beginner - - - - 30 mins
Expert - - - - - - 10 mins
Location
The CS is located on the side of the engine block (right) a wee bit below the distributor cap.
Removal
Step 1: remove the air intake box (where the air filter is housed).
Step 2: using the flat headed screw driver, loosen the jubilee clip and remove the rubber hosing which leads into the inlet manifold. (be sure not to let anything go inside the inlet manifold)
Step 3: using the flat headed screw driver, loosen the jubilee clip and remove the rubber hosing at the other end of the inlet manifold hose.
Step 4: remove the wire connector plug (no need to disconnect the battery)
Step 5: use the 11mm socket and extension to remove the two bolts either side of the CS.
Setp 6: remove the CS from the engine bay.
Cleaning
Again, there will be various ways to do this, but I used some steal wool, a toothbrush and some hot soapy water. Be sure not to get the water in the connector.
Drying
Make sure the CS is completely dry.
Reassembly
The reverse of removal
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I hope this is of help. If there is anything I’ve missed out, or you think would be beneficial to add in, give me a shout and I’ll edit it in.
Good luck!
(Disclaimer: I did this How-To to help. I am in no way an expert and should only be used as information. I take no responsibility if any of the information I have given is wrong.)
