Hi All

In Stu Ritters book, page 130, it states the camshaft timing can be adjusted over a 6 degree range.

I am about to put my cyl head on tomorrow and would like to know how the proper timing is achieved? I dont really want to tinker with the timing but would like it to run ok all the same!!

Would i be ok to follow my original plan and place the crank at TDC and have the camshaft line up??

Hope someone can explain if this is really critical, or a few degrees is ok!!

Thanks
gerard

If its the same as my W124 M103, you can adust the timing if its a factor of exactly 3 degrees out.
This is done with a resistor on the side wall of the battery area.

If you look on the inside wall where the bettery is (facing the engine) you will see a small plastic cyclinder with numbers and N, and S, marked on it. You can pull out the cylinder and its like adjusting a watch, pull it part way out, line up in the new position, push back in a check.

Good luck.

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I'd rather a full bottle in front of me, than a full frontal labotomy.

use an offset woodruff key???

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2001 Mercedes-Benz C320 3.2
1991 Mercedes-Benz 300E 3.0

its the valve timing that I was wondering about, the other resistors alter the ignition timing I think. It doesnt matter now anyway as the head is on and the engine runs ok. :-)

The camshaft sprocket is located by 3 bolts and doesnt seem to be adjustable. I dont know where an offset woodruff key would fit.
I was just wondering how and why this adjustment could be made and just to make sure I wasnt adjusting something inadvertently. I only found out about this last night and wanted to know more!!
Gerard

Forget about the previous post giving advice on adjusting your camshaft timing with the resistor.
A camshaft is not, has never been, will never be adjusted by a resistor.
JackD

The sprocket can be put on different ways which changes the cam timing. I'd put it back the same way! I could check my discs to see if I can come up with more info, but I've always put them back together the same way they came apart.

Gilly

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number one at TDC

check both valves are closed.

check distributor is pointed (will be pointed) at number one.

turn engine several times once the head is on and check to see its still at correct timing.


thats about it really.

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The car is running ok again, the cam is timed the way it came off, TDC on crank and punch marks on cam and cam bearings. No extra fiddling or poking at funny bolts or screws. I learned during my apprenticeship to put marks on everything whether it was marked or not , just incase!! It is more reassuring during re assembly.

I just wanted to know how this 6 degrees of adjustment may be achieved, probably as Gilly says by combinations of sprocket position on the cam. Stu Ritter knows I guess!! Thanks for all your replies.

Gerard