Moparts Tech Archive
Air Cleaners Q's70 and Up BB Dual Snorkel Air Cleaners Difference
I just bought a dual snorkel air cleaner for my '70 big block from a guy who took off his 4bbl and put on a 6 pack on his '70 Coronet R/T. Anywho, the air cleaner is orange. Now I know that the correct color for my car is textured (wrinkle?) black. He claims that he knows that his is an actual '70 dual snorkel. Well, I'm skeptical, given that he's not the orginal owner and I've been looking at pics of '72-74 BB Roadrunners that appear to have the same air cleaner in orange. "Appears" is the key word here.
What the hell; I'm gonna paint it black anyway, but I was just curious if anyone had seen an orange BB dual snorkel on a '70. Was it correct for A, E, C, or some B-bodies?
In the same issue, the is a 70 Polara vert with an orange dual snorkel air cleaner. Maybe that is correct for c-bodies. I am looking for one myself and I am almost positive that all B & E bodies were wrinkle black.
MOST (Not all) of the '70 Dual Snorkels have the hose routed off the bottom of the driver's side snorkel, around the back od the housing, to the crankcase vent.
The difference is in the snorkel... I'll try and explain as best I can. Look at the picture below, focusing on the passenger side snorkel. Just above the muffler on the AC line, you'll see a straight ridge running diagonally across the snorkel. On a 70, that ridge is straight as pictured. When they added the nipple to the 71 aircleaner, that section was modified for the nipple. In 72, when they went back to the original setup, they left the rounded piece there where the nipple had been the year before.
70-71 are wrinkle finish black
72-73 are orange, and have the nipple moved back to the passenger side rear of the housing. But the "humps" are still in place on the snorkles.
The arrow points to the raised circle I was trying to decribe which makes this air cleaner a 72 part. The 70 air cleaner doesn't have that, just the straight ridge.
Mark, the air cleaner you described is a 71 unit.
Kurt beat me to the punch, that is an excellent close in pic of a 70 air cleaner he's posted, familiarize yourself with that snorkel design, the hump or raised circle is very obvious once you know the difference.
On the 1972 Polara ex-Washington State Patrol with a 440 I have it has a single snorkel with a huge trap door on the underside. It is vacuum operated, opens when you really hit the gas.
of course there is a large 2-1/2" hose inlet on the bottom of the left snorkel for hot air intake from the left side exhaust manifold heat stove.
in 1971 only on the dual snorkel air cleaner the nipple is on the drivers side snorkel for the hose leading to the valve cover breather on the passenger side valve cover
in 72 the nipple was once again, as was on the 1970 air cleaner, located on the rear of the air cleaner housing
1971 and newer dual snorkel air cleaners that use the rectangular snorkels have a "bump" on the diagonal rib on the drivers side of either snorkel
Another question, are the intake snorkels the same size between '70-74? Also, is the carb opening the same for those years?
95% of the people who look at your car will never notice the difference once you paint it black wrinkle anyways. Enjoy!
Just find yourself a cop car one and then you don't have to worry about all the doors and vacumn hoses.
bob carb opening is the same and the snorkel sizes except the bump are the same ...
i didn't know all the differences but when i first got that pic paul put up i knew it wasn't a 70 air cleaner .
herg , that air cleaner sounds like the one on a smallblock , also it may be the same used on noise reduction package cars ???
not 100% sure, but i believe thats correct
It was on a '70 Polara CHP cruiser. I think that the trucks also used them. The single snorkel with the trap door was used on later 340 and 440 engines.
I've seen lots of cop cars, but I've never seen that air cleaner with no vacuum pods or trap doors before. That's a new one on me.
74 was the start of the oval-snorkles, and the dual snorkle had a shorter second snorkle, positioned straight out the passenger side, not angled toward the front like the driver side snorkle.