Blown Head Gasket? Intake Gasket? Worn Valve Guide? 350 SBC - Page 3 - Chevelle Tech
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post #31 of 32 (permalink) Old Jul 4th, 16, 1:33 AM Thread Starter
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Jake
 
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Re: Blown Head Gasket? Intake Gasket? Worn Valve Guide? 350 SBC

Quote:
Originally Posted by langss View Post
Well I was hoping.........
Me too. I've concluded there were a number of issues going on. Coolant leaking through headgasket and now valve guide issues. By replacing the head gasket and torquing everything correctly, the coolant was no longer "disappearing".

Got a set of used vortec heads (no cracks!) so I'm just getting ready to assemble the valve train and get things back running and move onto something else like the interior
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post #32 of 32 (permalink) Old Jul 14th, 16, 8:36 PM Thread Starter
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Jake
 
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Posts: 74
Re: Blown Head Gasket? Intake Gasket? Worn Valve Guide? 350 SBC

Update:

Interesting outcome. To recap, got a 66 chevelle with a 350/350 combo. Idled poorly, black smoke emitted from the tailpipes, coolant leak/disappearing - all within 10 minutes of startup and letting it idle for 30 minutes. Fast forward, after swapping the heads with a set of vortec (ported and polished), brand new intake manifold, gaskets, the white smoke was still occurring, although there were no longer any coolant problems (I flushed and bled the coolant system), however, the white smoke was still occurring. Vacuum & compression tests were fine, engine sounded great. After bringing it up to temperature and letting it idle for 45-50 minutes, I tuned the carb making the idle mixture a bit richer and also set ignition timing to about 12 (22 w/vacuum). Well, over the duration of this time the smoke dissipated until it was completely gone. Although the exhaust pipes were new, the muffler and exhaust manifolds were not. Curious if there was a **** ton of build-up in them causing the problem. Or a combination of factors of variables... hell, there were no bolts securing the engine motor mounts to the frame so it was shaking until I added those.

Anyway, heres a video of the first start-up after installing the heads and manifold. You can see the shake
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