Need help with timing

[92CK2500]

I've got a 1992 chevy C2500 with a 5.7 350 small block paired to a turbo 400 trans. I was working on the timing and I had it set to zero, I left the truck running and noticed the exhaust for cylinder 8 started to glow orange. I let the truck cool down and got it to run good at around 22 degrees, No sputters didn't cut out ran amazing. I recently got my intake manifold resealed as it was leaking oil badly. The tech that unplugged the electric timing connector when he reset the timing to 0, I haven't messed with the timing since then and it is still currently set at zero, Could I have damaged any components when I originally set the timing to 22 without unplugging the connector? I would like some help with this as I'm still pretty new to these trucks. Thank you

 

[docstoy]

Still have original exhaust ? What does your timing run at now after the tech reset timing ? Any other concerns or conditions ?

 

[White Trash]

Worst case, you have an exhaust valve going bad on number 8 cylinder. But that is the WORST case. You didn't specify if you set it at 22 BTDC or ATDC. If after, you simply retarded the timing too much and had burning fuel leaving your cylinder heating the exhaust. If you had it advanced to much, you may have heard a knocking sound coming from that cylinder. If you don't see or hear anything wrong now that your timing is set, probably nothing to worry about now that you have it fixed.

If you want to check for damage as a result, pull your plugs and inspect each one. While your plugs are out, turn your engine over with the key and listen for a gallop. This is also a good time to invest in a compression tester and test each cylinder. The actual compression for each cylinder doesn't matter too much as long as the lowest and highest are somewhere within 75 - 80% of each other.

Then take your truck to a mechanic with an infrared thermometer gun and have him shoot each exhaust port. I am willing to bet your #8 runs hotter than the rest simply "because". Having a SBC that has one or two cylinders that run a little hotter is not indicative of a problem as long as they are not excessively hot. That is simply indicative of owning a SBC.

 

[Scooterwrench]

Unplug the bypass, set dist 0-4 BTDC, reconnect bypass, take ground off battery to clear the code, reconnect battery, carry on!