rustytoolss
Well-Known Member
Whats the best way to plug the smog ports on some 302 heads? Were the exhaust manifold mounts to the head.
302 heads smog ports.
- Thread starter rustytoolss
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65Val
Average Length Member
Tap and plug with a grub screw with sealer on it. Make sure the screw is at least flat on the manifold mount surface, or slightly below.
66durgederp
"pull hard, itll come easy"
i used sleeve retainer and 7/16 freeze plugs. drilled out the holes with a 27/64ths drill bit. sofar so good!
I've done this and it worked well... :cheers:
moper
Well-Known Member
I don'u even use locktite...lol. tap the hole in about 1/4", run them in and bottom them out - tightly. Never had any come out.
rustytoolss
Well-Known Member
Whats a grub screw ?
65Val
Average Length Member
Redfish...good point! Test-fit your manifolds to check for interference areas.
A small set screw, usually with an Allen-type head.Use Loctite, silicone sealer, or teflon tape for sealing.
66durgederp
"pull hard, itll come easy"
quriositys sake any idea what ones? i used a 74 dart/valiant 360 drivers side manifold and a 73 d100 360 passengers side for my 66 dart, they both fit great with no mods necessary. my engine is an 87 gran fury 318 with 360 top end factory, its a highway patrol car engine.
mischiefdart
Well-Known Member
I used real small pipe thread plugs. Smaller than the 1/8 pipe plugs that are common on brakes or oil pressure senders. Maybe 1/16 pipe? I am not sure. Drawback is you need to find a pipe tap that size and the plugs. Plus is they stay put. I have early seventies A-body manifolds and the drivers side required a fair amount of clearancing.
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