Engine clattering noise w/video
 

I did a valve adjust, replaced fuel filter, cap and rotor, ignition wires and spark plugs on my fairly stock 86 and started it up and I'm now hearing this clattering sound, something tells me I may have botched the job. Before the valve adjust, the motor sounded very smooth, now it sounds like a diesel truck or old beetle, I have included a video link to the sound, suggestions welcome.

https://www.youtube.com/watch?v=F-ZgH8YuhU0&feature=youtu.be

Open up the valve cover you think the noise is coming from.

Rotate engine so you know you are on TDC for the first cylinder you check. Reach in and lift the rocker back and forth. Lightly force it against one side or the other of the rocker shaft so you are not confused by the side to side motion.

Rock the rocker several times so you get a consistent feel of the gap. There should be a slight click sensation and a movement. I know you did not botch all of them. Even if this is your first time, you have a sense of the 0.004" gap.

You just need to do this till you find the fattie. Once you confirm you have one out of spec, dial it in and make the decision whether to continue.

I would start over. Each valve you adjust, spin the crank four times and check again.

I agree with Bob. Start over a readjust all of them. Start at # 1 TDC & adjust them in the firing order. 1,6,2,4,3,5. You probably started out on the overlapping cylinder , so they are all out. Sounds like a box of marbles now.
Howard

.Bby any chance could you have gotten something in one of the cylinders. I recently had the top end redone on my 3.2 and after starting it sounded just like this. The engine builder had gotten a washer in one of the cylinders and it was causing an interference. I would suggest pulling all the spark plugs when you check the valve settings and turn the motor over through a full revotion to cycle all the cylinders through top dead center and make sure there is nothing hitting. With all the plugs out you should not get any stoppage or interference when cycling the motor. In other words the motor should rotate freely. Sometimes debris can collect in the heads. I would say if it cycles freely there is no interference in the motor.

Check the distributor cap. If it isn't sitting perfectly squarely on the distributor, the rotor might be hitting a pole on the cap. If they've been colliding, it should be readily obvious. Sometimes those spring-loaded retaining hooks can be a challenge to twist into position.

When you did your valve adjustment, do you recall having to make big adjustments to any of the rockers?

GK

Was this your first valve adjust? If you're using the standard method, it is typical I think for the valves to come out loose on the loose side the first time. It's probably nothing more than that, and loose valves aren't going to damage anything. But the others are right, it's time to have another go at it. Good luck!