Quote:
Originally Posted by steve25
It's strange , 6 looks tohave more of a burnt oil build up then 7.
Sam i would try and get as much of that backed on oil off of # 6 pistion as you can.
Otherwise there will be a lot of glowing hot spots at full throttle and then preingtion .
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Steve,
Yeah. It is odd. It's even odder when you look at the chamber view. #7 is kinda the "clean" one.
I think it might just be that I'm using the same modern synthetic 5W-30 as the other cars and it probably has a really nice detergent package. The oil in the chamber fouls the plug but seems to kinda clean the rest a bit and certainly seems to stop the carbon from sticking. Keep in mind, also, that #2 and #6 *used* to have an oil leak...
I was also a little surprised at how much carbon was building. I think with the pretty good leak going in #7 I might have been running an average tune that was fairly rich for the cylinders that didn't have a leak but ended up giving best vacuum overall because of #7 being lean (with the air leak)? Dunno. Plugs looked OK. Hope to be able to do a better job of tuning now if this fixes the oil issue.
Heads are on now. I'm not as worried about #6. It has the lowest compression, remember?
But I was thinking maybe I'll warm it up and trickle some water into the carb for a little poor man's steam clean. Actually, I have a can of that GM carbon cleaner that you spray in as it is running and makes a ton of smoke. I might do that too (and then an oil change).
Gonna be a week or more before it is all together I imagine. I just wanted to get the heads on last night because it is really damp and didn't want any flash rust getting a chance to start anywhere...
Sam