installing intake/exhaust manifold

E

Easy Rider

Junior Member
I have a 29 pickup roadster and I'm replacing the manifold gasket. I noticed the 4 washers that are used to install the manifolds are concave/convex. Can anyone tell me if the washers are installed with the raised part of the washer against the manifold or is the raised part of the washer against the nut?
 
Question. I have rather thick but flat washers on my B intake/exaust setup. They seemed to snug up fine. Would these be the proper washers also?
Pete
 
Peter J said:
Question. I have rather thick but flat washers on my B intake/exaust setup. They seemed to snug up fine. Would these be the proper washers also?
Pete
Click to expand...

The reason for the cupped washers is to take into account the possible differences in the thicknesses of the ears. The washers will slide around a little to apply the same pressure on each of the ears.
 
Having just gone through this, if you are using the copper gasket, you will need to tighten it mulitple times as the engine is run. This is due to the copper moving aorund and having the pressure even out under the manifold.
 
Peter J said:
Question. I have rather thick but flat washers on my B intake/exaust setup. They seemed to snug up fine. Would these be the proper washers also?
Pete
Click to expand...
Peter...What you describe as thick flat washers...You may have brake shoe rollers installed instead of the proper convex/concave heavy washers. (Yes I've seen it!)
Convex or concave...depends on your point of view!
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Brake Shoe Rollers ...................Concave Stud washers

The convex side goes toward the nut. "The word convex means curving out or bulging outward." Placing them so, allows the washers to self adjust to place equal pressure on the manifold ears.

Good Day!
Dave in MN
 
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