Chpt 2: Now that the head is off
...and I can get a really good look at things, the gasket seems to be in tact, no signs of blow thru or blow by, unless I'm just not clued into what that should look like, I'm assuming an obvious area of errosion, or fluid migration, but not seeing that.
#3 cylinder(head) and piston top are really pretty clean as opposed to the black carbon build up on numbers 1, 2 & 4. My guess is that #3 was getting a "steam cleaning" with the coolant being introduced to it, but I can't see where it was entering. I don't see any cracks, hairline or otherwise.
I tried a "leak test" of sorts on the bench, put plugs in, filled the head chambers with gasoline, and shot some air into the exhaust and intake ports; got a fine stream of bubbles on each of the exhaust, not so with the intake.
Any clues from the more knowledgeable? More tribal knowledge?
In case anyone is wondering, we're looking at a 2.0 L-Jet, '84 vintage.
UPDATE: Could it be that the intake manifold gasket was leaking? Finally was able to remove the manifold from the head and on the underside, where the coolant would be flowing, there's a distinct brown residue/film of sorts ONLY around the #3 intake port. Tough to say if the gasket failed for certain, but it does have a slight look of being faulty right where it is on the edge of the intake port itself. Make sense? Or am I barking up the wrong tree?
Thanks in advance-
...and I can get a really good look at things, the gasket seems to be in tact, no signs of blow thru or blow by, unless I'm just not clued into what that should look like, I'm assuming an obvious area of errosion, or fluid migration, but not seeing that.
#3 cylinder(head) and piston top are really pretty clean as opposed to the black carbon build up on numbers 1, 2 & 4. My guess is that #3 was getting a "steam cleaning" with the coolant being introduced to it, but I can't see where it was entering. I don't see any cracks, hairline or otherwise.
I tried a "leak test" of sorts on the bench, put plugs in, filled the head chambers with gasoline, and shot some air into the exhaust and intake ports; got a fine stream of bubbles on each of the exhaust, not so with the intake.
Any clues from the more knowledgeable? More tribal knowledge?
In case anyone is wondering, we're looking at a 2.0 L-Jet, '84 vintage.
UPDATE: Could it be that the intake manifold gasket was leaking? Finally was able to remove the manifold from the head and on the underside, where the coolant would be flowing, there's a distinct brown residue/film of sorts ONLY around the #3 intake port. Tough to say if the gasket failed for certain, but it does have a slight look of being faulty right where it is on the edge of the intake port itself. Make sense? Or am I barking up the wrong tree?
Thanks in advance-