84 l6 exhaust manifold
#1
#5
In some cases, it's a direct bolt-in swap. Sometimes there is a tab on the manifold that has to be ground off in order to work with the stock intake. Some people have alternator clearance issues. And, if you put on EFI manifolds, you'll lose the heat pipe going from the stock manifold to the carb, so you'll have to fab up a heat plate to put on the bottom of the intake manifold so that it's heated. Otherwise you can start experiencing carb icing and the engine won't run right.
#6
I don't think I have that heat pipe. The truck had a manuel choke put on it years ago and the heat riser was removed with the hole sealed shut when they did it. Makes for fun on cold New England mornings getting the truck started up. I have thought of trying to rebuild the choke, which would require the new manifold, heat riser and they choke.
#7
Trending Topics
#8
Another item to check before you start removing the entire exhaust manifold would be the exhaust pipe gasket found on your 84 4.9 I6 engine between the exhaust manifold and the header pipe. Later models had a metal to metal fitting at this connection. I understand this gasket was eliminated from this truck because of frequent failure... Might save you a bit of work because a bad exhaust pipe gasket could be mistaken for a bad exhaust manifold or gasket.
Good Luck!
HARFEND
Good Luck!
HARFEND
#9
Thread
Thread Starter
Forum
Replies
Last Post
jeff9942
1987 - 1996 F150 & Larger F-Series Trucks
26
03-04-2022 01:50 PM
plcdwg101
1973 - 1979 F-100 & Larger F-Series Trucks
4
04-04-2014 12:54 AM
skeneguy
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
14
02-09-2011 06:42 PM