Restoring - General discussions that span across many different groups of years and models > Drivetrain

69 390 Driver Exhaust Manifold Removal

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G Wood:
I have a small exhaust leak on my driver side manifold. Is it possible to remove the manifold without lifting the engine up a few inches? Any advice is welcome as would prefer not to have to lift the engine.

J_Speegle:
Never tried it but think its possible but you run the risk of problems. Not going to be pretty or easy, especially lining up access to those center exhaust manifold bolt heads.

At least there is no Thermactor to get in the way for that application. Good luck with which every method you choose
Maybe some here has does it - lets see

G Wood:
Thanks Jeff, ultimately I think that I will need to lift the engine but was hoping for another solution from someone that may have encountered the same issue.

Bob Gaines:

--- Quote from: G Wood on February 04, 2018, 08:12:19 PM ---I have a small exhaust leak on my driver side manifold. Is it possible to remove the manifold without lifting the engine up a few inches? Any advice is welcome as would prefer not to have to lift the engine.

--- End quote ---
The short answer is no.You need to disconnect the exhaust and lift the engine to get at stubborn bolts and the allow access to wrangle the manifolds out after lifting  up the engine. Be sure to use something like a wide 2X8 with a shop towel under the oil pan so that you don't dent it and shop towel protects the paint if it is nice . Keep a eye on the radiator fan lifting up too close to the fan shroud. You may have to disconnect it from the radiator.You don't have to take it out just disconnect it.It depends on how high you lift your engine. I disconnect one side at a time that way when lifting the engine tilts away from the shock tower more then lifting straight up Take the manifolds to a machine shop and have them surfaced . It is the same procedure as when they surface a flywheel. That will get them flat . Not suggested but in a pinch (Like on a weekend that you don't want to wait for a machine shop) you can take the manifolds and slide them over a concrete driveway in a circular motion (like a grinding table)  until the manifold surface is ground nice and shiny . I smear a thin coat of high temp silicone around the opening before mounting . Ford didn't use gaskets so don't be fooled with what comes in gasket kits. I can pick off and silicone that squeezes out for a original look. Even if I didn't care about a original look I wouldn't use gaskets. I have done this more times then I care to remember and like to do it as efficiently as possible so I can put it in the past.Just what has worked for me .Others may have a different way.

J_Speegle:
While we're on the subject documents from Ford related to engine assembly indicate that at some point Ford was using graphite between the exhaust manifold and head to reduce the chance of leakage and fill any very small voids.

Did this on the last engine I built. No leaks yet  ::)

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