Charcoal canister query

[Mad4slalom]

Hi all, any one know the correct pipe work to and from the carbon cannister in the inner fender of a 72 ? I saw a pic of an LT1 today and noticed two pipes exiting the pcv bung on the drivers side rocker cover. One was going , I presume to the carb, the other was heading down toward the inner fender. My 72 only has the one going to the carb, my engine bay smells a bit fuelly when hot and I seem to remember s pipe from my cannister blocked off with a cloth bung and a cable tie. I wondered if this was a possible reason. Do the cannisters need filling or servicing? TiA

 

[johng]

The canister on my 78 seems to be a bit more complicated than yours, see diagram below. You probably don't have the carb bowl vent valve (from what I've read it's not that important anyway). I replaced the charcoal in mine, but had to cut the canister in half to do so and then glue it back together. You can buy a new filter that fits in the bottom of the canister.

 

[Mad4slalom]

The canister on my 78 seems to be a bit more complicated than yours, see diagram below. You probably don't have the carb bowl vent valve (from what I've read it's not that important anyway). I replaced the charcoal in mine, but had to cut the canister in half to do so and then glue it back together. You can buy a new filter that fits in the bottom of the canister.

View attachment 27844

Thanks johng, Crikey ! That is a complicated system ! Dont know if mine has much of that left or if ever had it from new. I will have a delve into what goes where on a 72 And what I actually have .

 

[johng]

I followed this thread to replace the charcoal in my canister, the plumbing on this 74 is much simpler than mine and might well be the same as yours.

1974 Charcoal Canister Rebuild - CorvetteForum - Chevrolet Corvette Forum Discussion

 

[Mr. Cricket]

I followed this thread to replace the charcoal in my canister, the plumbing on this 74 is much simpler than mine and might well be the same as yours.

1974 Charcoal Canister Rebuild - CorvetteForum - Chevrolet Corvette Forum Discussion

That was a thread on this topic that I would have referenced also. Shame to see the first reply Alan 71 who just disappeared one day taking with him amazing C3 knowledge and the most pristine C3 ever seen.