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NC-Fordguy
Thu Oct 01 2009, 01:06AM
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Location: Bethel NC
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Yea I know what you all were thinking but this is a family oriented 4x4 site

My blue Bronco has been suffereing from running poorly and stalling out at stoplights. I've rebuilt two different carbs with the same results. Only getting about 12 inches of vacume with 12 degrees of advance of timing. On top of that is an ugly sweep of the guage fluctuating between 9 and 12 inches of vacume irregardless of air'fuel mixture

Cylinder number 3 doesn't seem to be firing as when spark plug wires are pulled no loss of rpm or missing occurs.

There's also no exhaust manifold gasket between the head. Somewhere along the line a PO booger welded a broken ear on the head and I beleive the exhaust leaks right under the carb is what the stalling out is coming from...perculating the fuel in the carburator bowl


The booger weld can be seen near the firewall





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[ Edited Thu Oct 01 2009, 01:16AM ]

No Hablos Jeep

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NC-Fordguy
Thu Oct 01 2009, 01:14AM
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Location: Bethel NC
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I purchased a reman head through Deaver from NAPA in Tarboro. The parts guys highly recommended Deaver as they offer a good warranty and stand behind their products. Heads for these solid lift 170s are hard to find so I was surprised that they actually had one in stock so I snapped it up.

Sue came out and tackled the masking


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NC-Fordguy
Thu Oct 01 2009, 01:19AM
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Location: Bethel NC
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This is the stopping point tonight....I'll get back on it after work hopefully tommorrow


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ord.sgt.26NC
Thu Oct 01 2009, 05:57AM
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Joined: Sun Mar 18 2007, 10:12PM
Posts: 543
I hope this does the trick Ed.
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NC-Fordguy
Fri Oct 02 2009, 04:01PM
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Location: Bethel NC
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Didn't get as much done as I wanted to Thursday evening......had to run up to Raleigh.

Here's a couple of shots with the head removed


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NC-Fordguy
Fri Oct 02 2009, 04:04PM
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Remaned Head and new exhaust manifold painted.

I wonder if the hi temp paint is going to stay on the exhaust manifold???


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[ Edited Fri Oct 02 2009, 04:08PM ]

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NC-Fordguy
Fri Oct 02 2009, 04:11PM
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Location: Bethel NC
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Here's a couple of shots of the old exhaust manifold. Rung a couple of bolts getting it out but after 43 years I guess that's to be expected.

Notice the broken ear. This was a source of a major exhaust leak along with the booger welded head ear on the same port


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NC-Fordguy
Fri Oct 02 2009, 04:25PM
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Location: Bethel NC
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Here's a couple of shots of the old head on the floor. The head gasket is still attatched to it.

In the second picture notice the discoloration between cylinders 2 and 3. I wonder if there was a leak between these two cylnders??? What can't be seen in the picture is the large amount of soot that seemed to be traveling in that direction almost like it was trying to be blown out.

I'm not sure what that discolored valve on cylinder 1 is about
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[ Edited Fri Oct 02 2009, 04:27PM ]

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mcjeep
Wed Oct 07 2009, 09:31PM
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Joined: Mon Mar 12 2007, 04:40PM
Posts: 85
Ed, If you want to go fuel injected I have a 4.9 I6 complete with harness and comp if you are interested.
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