#1  
Old 11-30-2021, 05:06 PM
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68WarDog 68WarDog is offline
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Default Valve cover to Carb. Cover vent diagram

When I bought my 70 GTO it did not come with the proper passenger valve cover ventilation to Carb filter housing assembly. I now have bought the assembly, but no idea how it all attaches from the valve cover to the Carb filter housing. Can someone share a picture or diagram? Thanks

  #2  
Old 11-30-2021, 07:17 PM
Joe's Garage Joe's Garage is offline
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Default Here's a pic - presuming you have the original-style dual snorkel air cleaner.

The lower end of the PCV vent tube inserts into the passenger's side valve cover, though the hole in the center with a grommet to seal it off.

The upper end attaches to the air cleaner housing, using the PCV vent filter, which is installed on the inside of the air cleaner housing and retained to the housing with a spring-clip on the outside of the housing. The tube slips into a 1 1/2" long, ribbed rubber hose that slides over the fitting on the vent filter.

I'll see if I can find some more pics.
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  #3  
Old 11-30-2021, 08:20 PM
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68WarDog 68WarDog is offline
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Thanks Joe,, this doesn't seem to be the right tube for the 70 GTO? Or is there a difference between Ram air and non Ram air cars? I have a non Ram air.
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Last edited by 68WarDog; 11-30-2021 at 08:47 PM.
  #4  
Old 11-30-2021, 10:19 PM
Joe's Garage Joe's Garage is offline
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Default That looks like the Ram Air tube

The standard V8 tube is MUCH shorter on the horizontal section than that.

Here's a pic of a crusty one. I think they are reproduced, but not certain.
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  #5  
Old 12-02-2021, 04:51 PM
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gloryrestoparts gloryrestoparts is offline
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Default

the non ram air one is reproduced

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1970.5 Pontiac Tempest GT-37
400ci 4bbl 4sp 3.90:1
12.73 @ 112.42 2011 Pure Stock Drags
12.71 @ 110.58 2013 Martin FAST/FS race
12.70 @ 111.74 2014 Pure Stock Drags
12.60 @ 111.66 2015 Martin FAST/FS race

1968 Pontiac Firebird 400
TH400/3.08 open
export car - factory heater delete
14.48 @ 95.86 w/ 2.14 60' 2018 Pure Stock Drags
14.47 @ 95.02 w/ 2.16 60' 2019 Martin FAST/FS race
  #6  
Old 12-12-2021, 01:08 PM
Drdach Drdach is offline
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Default

I have a question on the smaller diameter hoses that are running to the snorkels....what are those supposed to look like and where do they run from...the picture above seems to have a T in it, is that what I am seeing?
also what is actually taking place inside those snorkels with what appears to be a spring loaded bypass door???


Last edited by Drdach; 12-12-2021 at 01:14 PM.
  #7  
Old 12-12-2021, 05:20 PM
Joe's Garage Joe's Garage is offline
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Default Yes, there is a 'T' fitting on the underside of the air cleaner base

The small hose attaches to the vacuum fitting in the top of intake runner #1, forward and to the driver's side of the carb.

From there, it goes to the thermal switch in the base of the air cleaner.

From the other side of that thermal switch it comes out to a 'T' fitting and then a hose goes from the other two sides of the 'T' to the thermal actuators to the snorkels.

I've attached a pic of the thermal switch.

Here is a listing with a pic of the bottom and the hoses, but the pic is in a format that won't load to this site:
https://musclecaraircleaners.com/pro...el-air-cleaner
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  #8  
Old 12-12-2021, 06:15 PM
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Old Goat 67 Old Goat 67 is offline
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Best I can do from that website.

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  #9  
Old 12-13-2021, 01:27 PM
Drdach Drdach is offline
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Thanks to you both

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