1968 GTO HO air cleaner - Pontiac GTO Forum
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post #1 of 15 (permalink) Old 06-24-2019, 12:24 PM Thread Starter
 
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1968 GTO HO air cleaner

Can somebody please let me know regarding the 68 GTO HO air cleaner.

Some say its the single snorkel the same as all other 68's others say it was an open element. My car was built late Nov 67.

Pionionhead states

"An original '68 400 HO GTO received an open element aircleaner, there was no Pontiac Q-jet dual snorkel aircleaner avail on '68 models, base 350 horse GTO's or 360 horse HO cars. "

The attached 1968 engine lineup shows a different air cleaner for the HO. The restoration guide says its the same single snorkel

If it is an open element anyone have a picture of this unit?
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post #2 of 15 (permalink) Old 06-24-2019, 02:58 PM
 
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68 HO cars had a single snorkel chrome topped air cleaner housing....

here is a low mile 68 yz car I had a few years back

those are just generic pictures in the description

Scott

just my opinion
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post #3 of 15 (permalink) Old 06-24-2019, 07:48 PM
 
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Originally Posted by datahoarder View Post
Can somebody please let me know regarding the 68 GTO HO air cleaner.

Some say its the single snorkel the same as all other 68's others say it was an open element. My car was built late Nov 67.

Pionionhead states

"An original '68 400 HO GTO received an open element aircleaner, there was no Pontiac Q-jet dual snorkel aircleaner avail on '68 models, base 350 horse GTO's or 360 horse HO cars. "

The attached 1968 engine lineup shows a different air cleaner for the HO. The restoration guide says its the same single snorkel

If it is an open element anyone have a picture of this unit?

I don't think you may have read the entire post?

Post #13 by Shake-N-Bake - I believe all 1968 GTOs left the factory with a closed lid air cleaner with a snorkel tube. I believe all had a chrome lid and single snorkel but I suppose some late model builds could have received the dual snorkel model seen on the 69 models but those would be the exception and not the rule. At any rate, none were open element type.....not from the factory.

Ram Air cars were fitted with (ie from the factory) the chrome closed lid snorkel air cleaner complete with heat riser tube and shroud. The open element air cleaner, ram air pans, foam seals and open element hood scoops shipped in the trunk. Those parts were intended to be fitted to the car at the dealership. The owner was expected to keep the original parts for use in inclement weather.....I doubt anyone ever reinstalled those items but that was the intended use.

Post # 17 by Pinion Head- I do now realize the stock embossed line style single snorkel 350 horse engine aircleaner came stock on '68 400 HO (360HP) GTO's. I stand behind my descriptions of the embossed lines on the '68 4bbl GTO & Firebird 400 air cleaners discerning this style from later style wide snorkel air cleaners Pontiac used through the '70 model.

Hope that clears things up.
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post #4 of 15 (permalink) Old 07-03-2019, 05:19 PM Thread Starter
 
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Any body seen this before?
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post #5 of 15 (permalink) Old 07-03-2019, 06:05 PM
 
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hmmm
nope on the lettering ...
the base looks to be 71 72 ish wrong inlet for 68 69 70 4bbl maybe 70 big car 455
pop the top off and look for small green silkscreen julian date 1/4 inch high
3/4 inch wide

between air filter and carb hole...

is there a vent hole in the base ?

S T
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post #6 of 15 (permalink) Old 07-03-2019, 08:58 PM
 
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Originally Posted by datahoarder View Post
Any body seen this before?

Ya, I've see that kind of bogus stuff at swap meets. Hmmmm. What year did Pontiac use a sticker on their air cleaners that said GTO 400 HO? NEVER. Probably sat on top of a 326CI powered GTO clone that sold at the Mecum action for $42,000.

BLK69JUDGE has shown you a photo of the 1968 HO chrome topped air cleaner. Anything else is not correct.
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post #7 of 15 (permalink) Old 07-05-2019, 04:57 PM
 
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Originally Posted by PontiacJim View Post
Ya, I've see that kind of bogus stuff at swap meets. Hmmmm. What year did Pontiac use a sticker on their air cleaners that said GTO 400 HO? NEVER. Probably sat on top of a 326CI powered GTO clone that sold at the Mecum action for $42,000.

BLK69JUDGE has shown you a photo of the 1968 HO chrome topped air cleaner. Anything else is not correct.
Related question.....

1968 HO air cleaner. Inside the housing is a baby blue vacuum valve of some kind. It has two nipples protruding from the bottom. One line goes from it to the flap in the snorkel. The other inlet nipple from the underside of the air cleaner is not attached to any source. 1) do you know the source and 2) the function. My assumption is this is for cold weather so N/A for my need, but I can't find anything about it.

DK

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post #8 of 15 (permalink) Old 07-05-2019, 06:10 PM
 
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Originally Posted by integrity6987 View Post
Related question.....

1968 HO air cleaner. Inside the housing is a baby blue vacuum valve of some kind. It has two nipples protruding from the bottom. One line goes from it to the flap in the snorkel. The other inlet nipple from the underside of the air cleaner is not attached to any source. 1) do you know the source and 2) the function. My assumption is this is for cold weather so N/A for my need, but I can't find anything about it.
I did send you a reply to your message you sent me. Did you get it? It looks like the vacuum source is the carb? View next Reply.

Last edited by PontiacJim; 07-05-2019 at 08:01 PM.
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post #9 of 15 (permalink) Old 07-05-2019, 08:03 PM
 
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Here is a diagram that may explain how it works.
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post #10 of 15 (permalink) Old 07-05-2019, 08:17 PM
 
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Here is a diagram that may explain how it works.
Thanks PJ! -- I really like learning about the mechanical solutions the PMD/GM engineers implemented.
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