Late A manifold

Mike(NEOhio) · Aug 14, 2017

Is it possible to get the manifold off a late A without taking the head off? I need to replace the gasket. I&T manual says to pull the head and manifold together.

matthies · Aug 14, 2017

If there are studs holding the manifold on then no, unless they come out with the nuts. Its either remove the head and manifold together or remove hood and fanshaft unless there are bolts holding the manifold on.

Mike M · Aug 15, 2017

Good time for a likely overdue valve job too. Way easier to remove the head and then any broken studs can be drilled out in a mill and the gasket area resurfaced too. Though the gasket surfaces on those usually are not in bad shape. Now if for some reason someone before used bolts and if they come out it will easily slide right out. I have used bolts in the past on some for this reason.

Mike(NEOhio) · Aug 15, 2017

This one's original studs. Nuts are just a lump and the studs look like points above the nuts. I think if I cut the nuts off, raise the manifold then cut the studs it would work. What would indicate the need for a valve job?

Pete in MD · Aug 15, 2017

After you slide the manifold out using this procedure how are you planning on removing the rest of the studs that are now flush with the head?

Mike(NEOhio) · Aug 15, 2017

Raise the manifold as high as it will go and cut them off above the surface so there will be enough to grab. Just speculating, didn't say I "could" do it that way.

Pete in MD · Aug 15, 2017

I hope you can get them out that way.

matthies · Aug 15, 2017

Since they are that bad, good luck raising it up much since the manifold will be grown around the studs. I rather pull the hood and fanshaft/radiator and work with the manifold while it is still fastened to a sturdy fixture. To each there own. If this wasn't your first time, I'd still wouldn't try it and neither will you next time. Before you start any of this back off the rocker arms so all the rust and debris stays out of the cylinders, and once backed off pressurize the cylinders with air to see how bad the valves are. You might hear and feel air from the manifold ports. Then you can decide which way to go for sure and maybe have the valves touched up like other have mentioned. Its been 20+ years since my first manifold removal and fought that one on the bench trying to get the manifold off the head, never again and surely not the way you will be going at it, but good luck the next one will be easier.

Mike M · Aug 16, 2017

I have worked on alot of 2 cyl. and can't say I ever had any that could not benefit from a valve job when torn down and inspected. Some minor and others major. Unless you know the head was recently removed and worked on. I have done many manifolds on the twin induction models like 50,60 etc. Way easier to pull the cyl. head and do the valves and put it in the milling machine and drill out any broken off bolts and resurface the manifold gasket surface which the twins are almost always bad on the RH side.

Late A manifold

Mike(NEOhio)

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matthies

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Mike M

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Mike(NEOhio)

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Pete in MD

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Mike(NEOhio)

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Pete in MD

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matthies

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Mike M

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