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Username Post: cyl head temp
"3rd Year" Gold Supporting Member
Posts: 320
Loc: upstate NY
Reg: 11-12-19
12-16-22 04:09 PM - Post#2851349    
    In response to Mel Foye

Attachment: vair_ducts.jpg (6.87 KB) 13 View(s)

If I recall, along with the belt driven fan those flat 6's had lower air ducts below the heads/exh manifolds with thermostatic flapper doors at the rear. The flappers were operated with bi-metal coils or springs similar to an old choke coil and opened or closed to let air pass, thereby aiding in warm up and cooling. Be good to know they're operational (assuming they're still in place) as well as muffler shields between mufflers & valve covers
'65 Impala SS, Crocus Yellow/blk
327 / 300 L74
M11 3 on the tree
12 bolt 3.31 open dif

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