I started up the 260 Z today and noticed at idle I can hear a clacking noise intermittently it mostly goes away when I rev the engine. I took the cover off and and went through the messy process of running the engine to check the oil bar jets were all working. I noticed that two were partially blocked so I took the oil bar off and squirted it out with carby cleaner and compressed air. When I put things back I went through the messy process again and noticed that the rear jet was a bit sluggish compared to the rest which were all working, I didn't rev the engine again.
Some time back I had had the head properly reconditioned with new rockers fitted and the valve stems equalized for height do that the cam lobes are centered on the rocker pads. Because the head had had 3mm shaved off I fitted a Kamiari twin sprocket chain tensioner set which I have now removed and refitted the standard tensioning system with suitable modifications as described in previous posts, so that works well.
I have never heard how the reconditioned head should sound on this engine because originally a couple of the cams were coming off the rocker pads and hitting the steel giving a regular tappet type sound. I fitted the kamiari tensioner straightaway so I couldn't hear what the camshaft should sound like because the noise of the sprockets and chain drowned everything out. I haven't readjusted the vale clearance.
I need to know if everything is normal with this engine , is there anyone in Adelaide I could take the car to to reasure me the engine is OK or not.
Edited by fluegel, 23 March 2016 - 01:48 PM.