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-   1958 To 1960 Squarebirds - General Technical Discussion (http://squarebirds.org/vbulletin/forumdisplay.php?f=14)
-   -   I've put it off long enough (http://squarebirds.org/vbulletin/showthread.php?t=22061)

sidewalkman 10-11-2017 07:48 PM

I've put it off long enough
 
I'm finally going to tackle the exhaust manifolds. The PO rebuilt the engine about 8K ago, and I'm thinking he noticed an exhaust leak and instead of dealing with the undoubtedly warped manifolds, he doubled up on the gaskets on each side. So factory is none, I have 2 per side. I've going to start tonight to rectify it. I put on a new Edlebrock carb and during the test drive was checking out the secondarys when the whole back of the outermost gasket blew out, from top bolt to bottom bolt. Although I like a throaty exhaust note, this is WAY over the top.

I've got a big block of completely flat cedar, about 24" long by 12" wide by 8" deep that I'll use to mount a sanding strip and sand the mounting surfaces flat, if they're too far gone I'll take it into the shop to plane. My hope is I don't snap any bolts....wish me luck, I'll report back with hopefully some pics if I can remember how to post them.

jopizz 10-11-2017 08:05 PM

Quote:

Originally Posted by sidewalkman (Post 111645)
My hope is I don't snap any bolts....wish me luck

Hopefully the PO used some anti-seize on the bolts when he did it the first time.

John

Tbird1044 10-11-2017 10:03 PM

It may be worth it to take the manifold to a good shop and get them blancher ground flat. Chances are the head surfaces are in good shape.
Nyles

Woobie 10-11-2017 11:21 PM

That brings back memories. Removed the heads and did valve stem seals at the same time. Replaced head gaskets that had rotted at the water passage blockoff. Geeesh ! How I miss that old bird.

sidewalkman 10-12-2017 07:59 PM

Was under it for 3 hours last night. the drivers side outside lower nut on the stud for the exhaust pipe is being a puke. Might be stripped. it loosened about a 1/4 inch then I run into the socket hitting the frame right there. I'm trying a different socket this weekend. I need to drop the pipes to access the bottom manifold bolts.

And John, there is no chance at all that there was never seize on them, lol. I might end up pulling the head, I am through driving it this summer anyway and I would like to look at the valve train. I have a gut feeling that the intake water jackets might be partially plugged just by the burnt paint on the intake. I flushed it during the summer and the crap that came out was pretty ugly.

I must say, that motor is shoe horned in there!!! I have the car on jack stands on the front frame and it might make fife easier to undo the nuts on the motor mounts and lift the motor an inch or two.

Thoughts?

Woobie 10-12-2017 09:51 PM

If there is some kind of spray that will freeze it, you might be able to loosen it that way.

The freezer was the final maneuver that loosened an exhaust stud that had to come out. Pb blaster + heat repeatedly and it didn't budge.

There is the exhaust crossover in the intake manifold, too. It may contribute to the burning of the intake paint.

scumdog 10-12-2017 10:02 PM

Quote:

Originally Posted by Woobie (Post 111698)
There is the exhaust crossover in the intake manifold, too. It may contribute to the burning of the intake paint.

Dead right!

I did not use any gaskets on the face of the manifolds, just a thin smear of copper hi-temp RTV.

Joe Johnston 10-13-2017 10:09 AM

There is the exhaust crossover in the intake manifold, too. It may contribute to the burning of the intake paint.

It is common practice to block this crossover when rebuilding a Y-Block - gasket sets even are available with a metal plate covering this passage. I have no experience doing this with the FE series of engines, but the red paint stays fresh on my 312.

simplyconnected 10-13-2017 10:32 AM

I blocked my Y-Block crossover and I blocked my FE. In fact... Edelbrock aluminum FE heads and intake manifold have no crossover port.

It's important to 'gut' your heat riser valve if you block the crossover. And when you do, your cooling system smiles because it never needs to deal with crossover heat.

Here's the intake manifold...


and here's the head...



Notice that the port isn't even there. BTW, that 60069 is the right part number for the FE 390/427 heads. I love Edelbrock stuff. - Dave

pbf777 10-13-2017 11:27 AM

Just to clarify: Edelbrock #60069 assembled cylinder heads are for the Ford FE series 390, 406, 410 & 428 cubic inch engines. The 427 FE would require the Edelbrock #60079 assembled units.

The major concern is the difference in the valve spacing between the 427's vs. other FE's ;)

Scott.


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