Search results

Those posts are about the feasibility of coming through the oil fill opening in the valve cover with a scope to look directly at the rocker arms. My idea is to remove the spark plug, stick the scope into the spark plug hole, and view the movement (or lack of movement) of the valves inside the...

Rather than having to remove the valve cover, wouldn't it be possible to use an endoscope or borescope (kind of like this) through the spark plug hole to check that both valves are opening? If its rocker arm is off, the valve will be closed when the other one is open.

Some people might have missed where the OP mentioned in his initial post that Mazda had confirmed 26 similar occurrences.

Actually, it [the rocker] relies on 3 points of contact at all times: valve, cam, and HLA. I don't see how oil pressure figures into keeping contact between the rocker end (at the HLA) and rocker roller (at the cam). Look at the diagram at the link in my previous post. There's a substantial...

I don't understand how low oil pressure could be the cause of the rocker arm falling off. If it was, wouldn't the rocker arm be likely fall off each time the engine is started, since oil pressure is essentially zero for the first turn of the camshaft? There's a drawing and explanation of what...