Valve adjustment weirdness, valve adjustment Options

[Java2570]

Ok, I'm a newbie with a 1974 914 2.0L. I am replacing my heat exchangers and exhaust this week and while I have them off, I figure I'd adjust the valves while
I've got extra room to do so. So.... I spent time finding TDC notch on my flywheel and scribed a mark corresponding on the bottom viewing window of the trans.
I also have a red paint mark that was made on the fan that lines up with this as well.
When I go to adjust valves on #1, they are very tight and can't even get a feeler gauge into it to adjust. Then when I try to loosen the screw, it is making no difference in the looseness of the adjustment. What is happening here? Am I making some stupid mistake or is there something wacky going on? I've adjusted valves before on Karmann Ghias so I know how to do the adjustment basically. Also, the nuts are not
13 mm, they are 14 mm on this engine. I know the engine is from a 1975 car but I'm
not sure if the rocker arms were replaced or not......confused.
Am I doing something wrong here? Thanks!

[VaccaRabite]

Ok, I'm a newbie with a 1974 914 2.0L. I am replacing my heat exchangers and exhaust this week and while I have them off, I figure I'd adjust the valves while
I've got extra room to do so. So.... I spent time finding TDC notch on my flywheel and scribed a mark corresponding on the bottom viewing window of the trans.
I also have a red paint mark that was made on the fan that lines up with this as well.
When I go to adjust valves on #1, they are very tight and can't even get a feeler gauge into it to adjust. Then when I try to loosen the screw, it is making no difference in the looseness of the adjustment. What is happening here? Am I making some stupid mistake or is there something wacky going on? I've adjusted valves before on Karmann Ghias so I know how to do the adjustment basically. Also, the nuts are not
13 mm, they are 14 mm on this engine. I know the engine is from a 1975 car but I'm
not sure if the rocker arms were replaced or not......confused.
Am I doing something wrong here? Thanks!

First off, do a search for the Krusty version of valve adjusting. Much easier then always trying to find TDC for each cylinder.

Also, the motor goes through 2 revolutions for each cycle. One is TDC, one is not. You may not be at TDC, even though you are at the TDC mark on the fan. If you are 180 off, the piston will still be at the top of its travel, but the exhaust valve will be open and there for VERY tight.

Zach