VCCA Home Forums TECHNICAL - 1945 AND EARLIER 1933-1936 1933 207 CYL. HEAD QUESTION

I just removed my intake and exhaust manifolds after breaking the exhaust studs off.When I removed the intake,I noticed tubes in the intake ports of the head.They almost look like venturis.Can someone tell me what they are and is there a proper position in the way you install them?I didn't remove them,but I want to be sure they are installed correctly before I re-install the manifolds.

Those are intake manifold sleeves and they slide into the cylinder head ports in any direction. The sleeves are also used for aligning the intake manifold when it is installed to the cylinder head.

Thank you JYD.

You bet!

The are also installed to provide a smooth passage to reduce turbulence which would reduce flow in the intake.

Well I just drilled out and replaced my broken exhaust manifold studs.Everything is sandblasted and painted.My next question is,what is the best or the proper way to bolt my intake and exhaust manifolds together so all the surfaces are flat when I bolt them back on the head.I am really scared of cracking a manifold when tightening them to the head.

You can bolt both the intake and exhaust manifolds together using a new gasket between the two, and then have the faces of the manifolds resurfaced at a machine shop. Doing that procedure will ensure that the faces of the manifold will be absolutely flat.

Use grade 8 allen socket studs in to the cylinder head. Use a torque wrench and torque them all evenly to 15 foot pounds ??? Coat the threads with anti seize.

I would think that a method similar to torquing a cylinder head gasket could be used to tighten the manifold bolts.

Starting at the center ones and moving in a circular pattern for center to farthest away duplicates the way a cylinder head or an intake manifold is installed.

I would think 15 foot pounds should be sufficient, unless there is an actual torque specified ????

mike lynch

If too much is removed from the intake manifold the locating/sealing rings may no longer fit in the recess in the manifold. It may be necessary to either remove some ring depth or re-cut the recesses.

I would think that 25 lbs. on those manifold bolts would work better. Then after 500 miles re-check your bolts...per the book.

I would bolt the two manifolds together and not completely tighten the bolts/nuts....then bolt it to the head and see what lines up and go from there.

I agree with Gene. Have done that with several manifolds. Lightly bolt the manifolds together, install and lightly bolt the assembly to engine, tighten the manifold stud nuts. Remove the manifold assembly and check with straight edge. Also check the head with same straight edge. If all is okay install the gaskets and tighten manifolds to head. Otherwise have manifold assembly and possibly the mating surface on the head machined flat.

Thanks for all the suggestions guys.The surfaces are flat.My main concern is making sure the intake and exhaust manifold surfaces(where they bolt to the head)are lined up so they are all flat.I was going to put the manifolds together hand tight,then put them on a flat surface and tighten the 4 nuts which connect them,then check the surfaces with a straight edge.

Got it back together with no problems.Thanks for all your help.

Mike, sounds like the manifold project worked great. Just a note to say I'm working on my 33 again. You have been a great help in the past. I'm making my own exhaust setup. wonder if you would send me some pictures of your exhaust pipes and muffler.
Thanks Don

Hi Don,Great to hear from you again.I will get pictures for you this weekend.I just threw my old system away last sunday.I could have taken a picture of the whole assy out of the car.