| [GMCnet] valve cover leaks, cleaning engine [message #317659] |
Tue, 16 May 2017 20:06  |
Ek_Lektro
Messages: 167
Registered: March 2011
Karma:
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Senior Member |
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So today i tightened a couple loose bolts on the valve cover, and since i’m soon going down to Tijuana
for various work, i figured it’d be a good idea to clean the oil off the top and sides of the engine, so that after the drive
i can better check for sources of any remaining leaks, and to make things cleaner for upcoming work.
So i got the Gunk Engine Degreaser (original) and followed the directions,
covering the carb. Once i carefully hosed off the top and sides of the engine,
i sponged up some pools of water on the top, then checked the spark plug wires
and started it up. Right away I was getting some misfiring from the drivers side, not rhythmical, but random spitting
and i figured that might go away after a few minutes. After 7 or 8 minutes i figured i better
shut her down and see if i was overlooking something. My ’78 403 has headers, and i’ve long suspected
a leak on the drivers side. Could this be related to the cause of the misfiring? Should i get the compressor and blow things dry as possible
before trying again? or just go ahead and run the engine longer? I remember one experienced GMC mechanic once telling me that
engine cleaning was OK, and “You won’t hurt nuthin’”… So despite being a little un-nerving to hear the engine sound so sh*tty,
i’m happy it at least reminded me of that potential header leak (since TJ might be a great place to have them take care of it)!
BTW: Excuse me for multiple inquiry posts this month, since i’ve been working on both coaches
at the same time; And so If there’s a way to give back, like a place to donate for the upkeep of the forum
or something(?), please let me know. (GMC.net Prime? like Amazon Prime?, LOL)...
(Yep, i’m a prime question-asker, but lacking any mechanical experience ( before i got my GMCs ),
unfortunately i only rarely have technical knowledge to share,
and I don’t want to over-use the privilege of this esteemed body of knowledge :)
Many thanks, everybody!
Greg / Los Angeles / ’78 Eleganza II / ’76 Birchhaven
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