Here is one video how you can adjust valves on Kadett C . Inlet valves are 0.15 mm and outlet valves are 0.25.
So recommended is that the engine is warm. If you are playing with cold engine I recomment that you adjust valves on IN 0.20 and outlet on 0.30. When engine heats up, material expands. So it is much better if the valve clearence is higher then lower. It is is lower the valves won’t seat and you won’t have good compression.
First just check valve clearence when engine is not runnig, by removing the cover. Rule is that you setup 4 cylinder when 1 cylinder valves are leveled, then 2-3,3-2 and 1-4. You set them up with 15mm socket.
Be carefull cause valves are messed up in this engine. See picture below.
After you checked the clearence, turn on the engine and carefully check the clearence again. Do not touch gas pedal, because you don’t want oil all over your engine bay. You can also add piece of paper so oil won’t spray all over the engine.
And here is video when engine is running.
Hello, I am sorry, could you please explain these lines? I do not fully understand it. What exactly I need to do?
“First just check valve clearence when engine is not runnig, by removing the cover. Rule is that you setup 4 cylinder when 1 cylinder valves are leveled, then 2-3,3-2 and 1-4. You set them up with 15mm socket.”
PLEASE reply to me in mail if you cannot reply here. THANKS A LOT!
It’s just a precaution, cause on old car like this, springs can be broken, so you check clearence and make sure there is more clearance than in manual. Its better that is more space betwen than less, cause you will burn a valve.
Then you heat up a car and with running you check clearance again.
Thanks a lot for the explanation!
In general do you know any modifications / improvements that can be done to this engine (12s or 12sc)?
Thank you!
One of the simplest one is electronic injection. You will have better response, better milage and you should have more power, also car runs smoother. I have it somewhere in my blog and you can check it. Also you can change jetting and add sport filter, but I didn’t messed with that, because its not my car, but some more power would not hurt 🙂
I am terribly sorry… I am unable to find anything with regards to new injection system in this blog. Can you please point me towards it? Thanks!
I must apologize, I meant electronic ignition, not injection. Here is link https://vrcustoms.wordpress.com/2015/10/27/electronic-transistored-ignition-module-for-old-cars/