Lifetime Premium Member
Join Date: Jan 2001
Location: Near Reading PA
I started my ZZ4 up and ran it for about 10 minutes to get the timing set and adjust the carb, then changed the oil right away and it was full of crap (looked like glitter). I ran it for a few hours during the course of the next week, and changed it again with it hot. It still had some crap in it, but not near as bad. Went three months then, and the oil looked good at that change. I took it easy for the first few hundred miles then had at it. No problems 4 years later. The rings need time to seat, but otherwise, you'll be good to go if you do the oil change right away. One problem I did have though, was the waterpump fan mounting surface wasn't square, and the fan wobbled. That was a bit of a bummer, but otherwise, it's been a great SB.
69 Malibu. It donated it's ZZ4 to my stepside, so a junkyard 454 is pending. Stay tuned....