The trick to getting the manifolds to reseal after taking them apart is not to tighten the joint between the exhaust and intake manifolds initially. Bolt them together with the gasket hand tight, bolt the manifolds to the head again with the gasket hand tight, then slowly tighten the bolts sequentially going from the joint that bolts the two manifolds together, then back to the bolts that bolt the manifolds to the head. You want to go slowly at first as you want the manifolds to be able to move in order to get them to align, enabling the gaskets to seal.


Phil
Moderator, The Engine Shop, Interiors and Project Journals

1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube
Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes
Project Journals
Stovebolt Gallery Forum