View Single Post
Old 12-17-2018, 03:56 PM   #5
hatzie
Moderator
 
hatzie's Avatar
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,916
Re: Dual Tank Venting

Get a 1970-1973 Corvette charcoal can. It's still available and easy to hook up.
The cans for many early 70's rigs are the same but not available new. Worth a shot if you don't want to spend much.

The Vent and purge hoses should be SAEJ30R7.

Put a Tee in the vent lines and run them up to the charcoal can Tank or Fuel Tank connection.
Put a Tee in the PCV hose and run the PURGE or PCV connection to this Tee.
Run a vacuum line from the vacuum valve aneroid on the charcoal can to ported vacuum on the carburetor. This one may or may not be marked. It's the connection to the top of the hat on the vacuum valve.
The carburetor bowl is directly vented inside the air cleaner ring so that connection is usually capped off.
Name:  Charcoal can.jpg
Views: 459
Size:  23.0 KB
__________________
1959 M35A2 LDT465-1D SOLD
1967 Dodge W200 B383, NP420/NP201 SOLD
1969 Dodge Polara 500 B383, A833 SOLD
1972 Ford F250 FE390, NP435/NP205 SOLD
1976 Chevy K20, 6.5L, NV4500/NP208 SOLD
1986 M1008 CUCV SOLD
2000 GMC C2500, TD6.5L, NV4500
2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263
2009 Impala SS LS4 V8


RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.

Last edited by hatzie; 12-17-2018 at 04:26 PM.
hatzie is offline   Reply With Quote