How about a loose crank pulley? Ask me how I know... Last week I sheared my crank key due to a loose crank bolt. I fixed it this weekend, but a loose crank bolt or loose pulley bolts will "knock".
Ken Bogart ----------------------------------------------------- 96 Montego Blue FFS Coldside (His) 97 Black & Tan (Hers) 90 Crystal White (sons) ------------------------------------------------------ http://www.miatacare.com http://www.cincimiata.com http://www.miatagathering.com http://www.bcchallenger.org MiataMail.com list owner On Mon, Jul 12, 2010 at 3:04 PM, Bruce Andrews <[email protected]>wrote: > I have a 94 Miata; I have hade some problems with it. It has 125K on it > the compression is quite good at 150, 150, 149, 149 respectively. I changed > the timing belt 300 miles ago. The one on it did not look bad but was > somewhat stretches. My main concern is when I set the engine to TDC the > exhaust cam gear marking was off by 3 teeth counterclockwise. The engine > sounded OK except for a knocking noise from the alternator. I set the timing > marks as per the manual. The engine started right off and I was able to set > the timing to 10 deg. BTDC. I ran it for 100 miles then moved the timing to > 14 deg. BTDC. The engine ran good for the first 50 miles, but developed a > miss off idle. I just checked the timing and it is right on 14 deg, BTDC. > > > > Second I changed the alternator to one I had that has only 2000 miles on > it. And new drive belts. After tightening the belts the knock was back. I > loosened the drive belt on the alternator/ water pump, and the knock went > away. Is this common? > > > > Does anyone have something I can try? > > > > Bruce Andrews > > _______________________________________________ > Miatapower mailing list > [email protected] > http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower > >
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