Does the second version of the A manifold ( reinforced bit aft of #4) have the same priblem with sagging as the first version? Are the new ones available today any better at keeping their shape as the original? Do the manifolds with the heater stay in shape better because of the extra surface to dissipate heat?
Manifold sag
- Thread starter Hoovercw
- Start date
Mike Peters
Well-known member
I've seen sag on both versions of original exhaust manifolds. If the sag is significant enough that gland rings cannot be installed, then buy a new manifold. There's no reason to think that the new manifolds won't eventually sag like the originals, but cross that bridge wen it comes. Most Model A's aren't driven enough miles over rough roads to worry about manifold sag. Heater manifolds seem to be built heavy enough to withstand sag. When purchasing an original manifold, it is prudent to carry a straight edge to measure exhaust port line up.
BILL WILLIAMSON
Well-known member
Yo' Mike,
I've "thought" about a flat iron bar, welded to the head pipe & up to a manifold stud, to relieve the load & prevent SAGGING at the rear of manifolds. Thoughts, PLEASE.
Bill Bracket
I've "thought" about a flat iron bar, welded to the head pipe & up to a manifold stud, to relieve the load & prevent SAGGING at the rear of manifolds. Thoughts, PLEASE.
Bill Bracket
Mike Peters
Well-known member
Bill: Good idea! That would take the weight off #4 exhaust port, which causes manifold sag in the first place. mike
