273 Cracked Intake manifold with a belly of "Charcoal"!
My 273 has a 2 Barrel Intake & the original B&B 2 Barrel! Not sure why oil would be "Splashing onto the intake on the underside of of the Carb Injection Ports which should only allow for heated exhaust is ported beneath the intake, as I said, below or under the intake ports.
There are 2 center exhaust ports from the exhaust manifold which allows the heated exhaust to go into the Under Belly cavity to heat the fuel & warm the air as both enter through the Carburetor & dispersed to the cylinders. So I guess that if there is excessive blowby due to bad piston rings, oil could be being blown into this "BELOW THE BOTTOM OF THE FUELED INTAKE PORTS! The "Underbelly Chamber" is not an airtight feature as a thin steel plate is simply riveted on & exhaust gases would easily escape the 360° perimeter of the intake manifold's belly plate. I called this massive buildup, CHARCOAL, Because it is exactly what it looks like a the fact that the entire cavity was filled with Baked "Fuel&Oil" that formed large hardened chunks & layered flakes residual debris. Rationally, fuel which could have leaked thru the cracked cast iron intake, as I stated, centered under the passenger side carb barrel . The intake crack runs from the front to the rear of the underside of the chamber to the front, is about 4" long & is more than just a hairline crack. I didn't see it until the packed full, coal storage was removed & a I used a small wire brush to remove the hard baked layers. Since This is not a hard pressed, urgent project, I may just sandblast the intake & use Extreme Heat, JB Weld until I get it running. Money is tight, & it won't be running overnight!
Once I know, it to be a viable project, I can shoot at the stars, for a 4 Barrel Miracle, 273! I am guessing, this is a rare machine.
I mean it is one of the earliest Barracudas!
Well that sucks. 4 barrel right? You can braise it if you have the torch and know how. Or you could find another intake. Place a wanted ad here on the site. Shipping isn't cheap because of the weight. They pop up for sale from time to time. 1965 only for the 4 barrels. Yp, oil splashes onto the hot intake and cokes up. Nasty stuff.