Discussion Starter · #1 ·
Hello everyone, I seem to have a slight problem (maybe not so slight). I rebuilt a 302 (out of a 1980 F-100) for my 66' mustang a few months ago and have put about 7000 miles on it; the problem is that it has a ticking/tapping noise at idle and seems to disappear at about 1200 RPM's (maybe because of added engine/fan noise) . I have checked to lifters and cam-lobes for any damage and they appear to be working properly. I have also checked the main and rod bearings for damage and they too are in good condition. My oil pressure is normal (running a high-volume pump) and my fuel pump is new. I also checked out my timing chain and it has a-little slack but I think that is normal. I also tried using heavier oil, 4 quarts 10w40 and one Lucas, the result was an ever louder ticking/tapping. I've also tried shorting out the spark plugs to see if there is any change in the noise; the result is that there is a change but only because of the dropped RPM's, not a reduction in noise. Using a stethoscope the noise is loudest on the bottom of the engine, particularly the front. Besides this ticking problem that I have (very annoying) the engine runs really well and has good acceleration. Any comments or ideas would be greatly appreciated.