Check cold start valve

We check the cold start valve on a Mercedes R107 560SL as a component of the KE-Jetronic. The cold engine needs more fuel and air, the engine gets the additional fuel from the cold start valve in the KE-Jetronic. If starting problems occur when the engine is cold, it is advisable to check the function of the cold-start valve.
Removal and function test in the video using the R107 560SL V8 as an example.
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Work on vehicles requires special expertise. Always commission an authorised workshop for repairs and maintenance. The articles shown here are in no way a substitute for specialist literature and are intended as suggestions and as a means of passing on information.
No liability is accepted for damage of any kind!
#mercedesbenz #oldtimer #r107

[@TogetherFaster]

Tolle Autos! Super Videos und Erklärungen! Kleiner Tipp: Ich würde in den Titeln auch die genaue Bezeichnung des Fahrzeuges angeben, z.B. Mercedes SL 560, R107... evtl. noch Motorbezeichnung... damit die tollen Videos häufiger gefunden, angeklickt und abonniert werden 😉
LG aus Freiburg
Rainer

[@R107Schrauber]

Vielen Dank Rainer

[@hmayerv8]

My 76 350SL R107 has this type of cold start valve also. You mentioned it's for KE-Jetronic. Would mine be KE-Jetronic then?

[@R107Schrauber]

No, you probably have a K-Jetronic, the 350 had the D-Jetronic until 02/76 and the K-Jetronic from 03/76. Best regards

[@hmayerv8]

@@R107Schrauber How would you be able to tell from looking at engine whether it's K or D? Cold start valve must be the same for all I guess

[@R107Schrauber]

What is the exact year of construction, i.e. which month in the year 76? The K-Jetronic has a flow divider, the D-Jetronic has a ring line and electronically controlled injection nozzles

[@hmayerv8]

@hrauber It must be the K-Jet then coz it has the fuel distributor/divider.

[@BobCraske-i1s]

Does the CSV always activate at start or only in very cold weather, you state 30 degrees (C or F). Also part of the test should examine for any continued leaking after disengaging the start?

[@R107Schrauber]

The engine temperature must be below 30 degrees then the cold start valve injects

[@BobCraske-i1s]

@@R107Schrauber 30 degrees C?, since my garage is around 25-30 degrees C, I assume that is why I am not getting 12V to the CSV when I turn key to ON and then use a remote starter to turn the car over (coil disconnected as per your video). No spray and no drips. If the car is under 30C then where would I look to determine why no 12V to the CSV? There is plenty of fuel pressure to the CSV so at least I know it doesnt leak

[@BobCraske-i1s]

@@R107Schrauber I read on the electrical schematic the switch providing power is closed until 68 F, 15 C so will re-test in the winter. Thanks

[@jerrykarlsson3978]

Should the coldstart valve always spray on a coldsstart? Mine does not when it is 0°C when i tested it. I own a 1990 230CE
Best raguards Jerry!

[@R107Schrauber]

If the temperature is below 30 degrees, it should always be sprayed at the start

[@Uc9uE3pKsS6uQ]

@@R107Schrauber as long as starter motor is on ? or timer ?

[@beniseferi375]

Nice video. My w126 280se is staying on high rpm (1500) while in park and n. When it goes in drive it drops to 1000rpm. Could this be from the cold start valve?

[@R107Schrauber]

d thank you, the cold start valve is not responsible for this. First of all, check the overvoltage protection relay, the additional air slide and possibly false air.

[@R107Schrauber]

th-cam.com/video/XfXCOaHz0aQ/w-d-xo.html

[@user-ld3zb7vu4h]

👍

[@R107Schrauber]

Look also here: youtube.com/@R107Screwdriver?si=O5ique8MI7WrHOkM

[@niravmaharaj3946]

I have an slc and there is no plug

[@R107Schrauber]

an SLC does not have a KE-Jetronic

[@louievigil8662]

My cold start valve does not spray any gas, is it for any temperature or does it have to be 30 degrees to activate

[@R107Schrauber]

It depends on the temperature sensor, the brass ring of the temperature sensor is stamped with the number of degrees and the duration of injection. it generally injects below 30 degrees

[@louievigil8662]

@@R107Schrauber thank you