My issue has been going on since November but it seems as if in the time since there have been a lot of threads of 2F and 3FE owners asking about engine knocks.
In my case it started as a strange rattle while I was heading out to pick up a table for the house. I turned around and went home to swap cars. I've pulled the valve cover and inspected the pushrods, valve springs, and valve movement. I've listened to through the screwdriver to each bolt on the rocker assembly. I've pulled one spark plug wire at a time and listened for noise change. Lastly just now I loosened all my belts so as to take the load off the harmonic balancer (which isn't wobbling or showing any sign of failure.)
I've checked the oil and the coolant both of which look like the liquids they are supposed to be as opposed to some mixture revealing bad things. I've checked motor mounts and brackets and nothing revealed itself.
its 30 Deg F here in Vermont and I just did the belt test and the truck started up no problem and runs smoothly but still a deep rpm dependent noise from within and low. I had to move the truck around the driveway and oil PSI is fine as is engine power. This I understand to indicate that the pistons sealing and all moving.
So the next step is to either pull the oil pan and have a look or just pull the engine. I'm not exactly racing to do either at the moment because I don't enjoy working on my back in the driveway in the winter. I'll eventually tow the truck over to my friends shop and get it up on the lift. In the mean time I'm researching swap options should I find something expensive inside the bottom end.
In my case it started as a strange rattle while I was heading out to pick up a table for the house. I turned around and went home to swap cars. I've pulled the valve cover and inspected the pushrods, valve springs, and valve movement. I've listened to through the screwdriver to each bolt on the rocker assembly. I've pulled one spark plug wire at a time and listened for noise change. Lastly just now I loosened all my belts so as to take the load off the harmonic balancer (which isn't wobbling or showing any sign of failure.)
I've checked the oil and the coolant both of which look like the liquids they are supposed to be as opposed to some mixture revealing bad things. I've checked motor mounts and brackets and nothing revealed itself.
its 30 Deg F here in Vermont and I just did the belt test and the truck started up no problem and runs smoothly but still a deep rpm dependent noise from within and low. I had to move the truck around the driveway and oil PSI is fine as is engine power. This I understand to indicate that the pistons sealing and all moving.
So the next step is to either pull the oil pan and have a look or just pull the engine. I'm not exactly racing to do either at the moment because I don't enjoy working on my back in the driveway in the winter. I'll eventually tow the truck over to my friends shop and get it up on the lift. In the mean time I'm researching swap options should I find something expensive inside the bottom end.