Hi,
I have a datsun 510 with a L16. I want to begin by saying i`m not mechanically knowledgeable but I bought the car to teach myself. There are two different things happening.
1) The exhaust is spewing out oil and water, my assumption is valve gasket needs a replacement
2) When you turn the engine there is a grinding noise and a knock every few seconds, my assumption for this is it needs a valve adjustment.
There isn't much info out there other than a youtube video that is maybe 10+ years old that I followed. I took the valve cover off, spark plugs (numbering them) I loosened the bottom bolt with the 17 spanner and the top with a 14, I made sure to make sure the lobes are facing upwards and tried putting in the feeler gauge between the lobe and lash. No matter how much I loosened either bolt the feeler gauge would not go in. I am not sure what I am doing wrong here. Not sure if there is a write up or a better video somewhere. If anyone has any guidance i would appreciate it.