Engine Timing
Asked by Richard Dec 03, 2018 at 02:44 PM about the 1992 Chevrolet S-10
Question type: Maintenance & Repair
So, I have a 92, S10 pickup with a 2.5L 4cyl. I was going to loosen the Dist to
adjust the timing. I loosened up the nut on the left hand side, but the Dist.
won't move. Looking in my manual I saw a brief ref. on it's possible that the
Dist could be pinned into position? Really?? Anyone ever hear of that?
3 Answers
Hornet_2497 answered 5 years ago
If it has a distributor, it has to be adjustable. Just to be sure, rotate or check your crankshaft pulley for timing marks with a timing light. If it has timing marks, it's adjustable. Just soak the distributor base with penetrating oil and try later. If it turns out you absolutely can not adjust the timing by rotating distributor, note that the timing changes as the points and adjusted narrow and wide...somewhere around 0.030 inches gap at their widest travel.
Yeah, Maybe it's just stuck there, I don't think it was ever, ever tuned up. So, it could just be frozen in position. There aren't any points on this one it's got a rotor and cap but a solid state module and an onboard computer to adjust the timing I think?
Hornet_2497 answered 5 years ago
You are right Richard. My information shows that your engine has solid state ignition, thus no breaker points, no timing marks, and nothing to adjust. That would explain that the distributor is "pinned" in place. I would guess the computer varies the timing by vacuum and engine speed. Lucky for you and there are no breaker point to wear out and mess up your tune up.
