302 Chevrolet Engine Build

Jeff Kempton · 04-25-2021, 12:47 PM

Quote:

Originally Posted by Larry Hill

Is that a 67 block with the vent tube to the outside?

Yes it is; from the opening post on this thread "I've always been fascinated by first generation Z/28s, which brings me to my first engine rebuild, a 1966 October 657 casting block with matching 462 casting heads."

Rich Biebel · 04-25-2021, 06:46 PM

A Road draft tube is what that was called and was on a lot of engines going back many years.

If you were behind an old car with one and they let off the gas coasting and their engine was a little worn, you’d see smoke trailing out from under the car from the tube. The idea was to create a little suction across the bottom of the tube to help vent the crankcase

They were pretty Sloppy and oil leaked out of there.

PVC systems replaced the RDTubes

larrylomascolo · 09-18-2021, 01:54 PM

Quote:

Originally Posted by Jeff Kempton

Yes it is; from the opening post on this thread "I've always been fascinated by first generation Z/28s, which brings me to my first engine rebuild, a 1966 October 657 casting block with matching 462 casting heads."

I have a short tale of a all original 69 Z/28 ,the dark green color,in a garage near my home,this was a virgin mary car ,all original ,,this is early 80,s,i asked if it was for sale,i had no money but I asked anyway,i would drive around his block 4or 5 times to look at this jewel,,he never drove it from what I herd,i fell in love with that car,dont know were it went ,guy moved,could not find one to restore so I found a 69 chevelle 300 deluxe 283 that was put in. 3spd standard on column,for $125.00 , in 1978 I still have it,set up for racing ,its a garage queen since a divorce and a house purchase

Dave Gantz · 08-04-2023, 01:23 PM

No activity for Mike since 8-5-21. Still out there, Mike?

04-25-2021, 06:46 PM	#2
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,320 Likes: 25 Liked 557 Times in 217 Posts	Re: 302 Chevrolet Engine Build A Road draft tube is what that was called and was on a lot of engines going back many years. If you were behind an old car with one and they let off the gas coasting and their engine was a little worn, you’d see smoke trailing out from under the car from the tube. The idea was to create a little suction across the bottom of the tube to help vent the crankcase They were pretty Sloppy and oil leaked out of there. PVC systems replaced the RDTubes __________________ Rich Biebel S/C 1479 Stock 147R

08-04-2023, 01:23 PM	#4
Dave Gantz Senior Member Join Date: Nov 2005 Location: Verrry South Jersey Posts: 537 Likes: 134 Liked 251 Times in 125 Posts	Re: 302 Chevrolet Engine Build No activity for Mike since 8-5-21. Still out there, Mike?