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#42435 02/17/2003 8:58 AM | Joined: Nov 2002 Posts: 394 'Bolter | | 'Bolter Joined: Nov 2002 Posts: 394 | Outside of a road-draft tube that I have installed on my 1957' 235 6 cyl.,is there something else here I'm missing for venting the engine?The valve cover cap is a sealed off one, no venting there.I need to know also what type of an air cleaner to run, because I don't have one..Would the air cleaner vent some? It's a new engine with about 2 hours on it.The engine sounds real good, but I don't wan't to blow out a seal here or something.. Bail me out here AMIGO'S..  | | |
#42436 02/17/2003 4:42 PM | Joined: Jan 2002 Posts: 2,839 'Bolter | | 'Bolter Joined: Jan 2002 Posts: 2,839 | I never knew they made valve cover caps which were not vented (at least for these older engines). My 235 has the side crank case vent tube which sounds like you have as well as the valve cover cap. When you say air cleaner, do you mean the carb's air cleaner? If so, I'm not sure if most people look at this as something that helps contribute to crankcase venting.
Craig My '50 Chevy 3100 5 window, '62-235cu, 3:55 rear My truck ....... Respect The Rust If I'm not working on my truck, '65 m00stang or VW camper, I'm fishing with the wife or smoking Salmon.
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#42437 02/17/2003 8:01 PM | Joined: Feb 2003 Posts: 1,377 'Bolter | | 'Bolter Joined: Feb 2003 Posts: 1,377 | Sounds like someone put a late model style cap on it,the 57 235 I have in my 37 has a breathable cap. I have a original aircleaner that I am not using,it has been painted. | | |
#42438 02/17/2003 8:15 PM | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | Twist on breathable caps are available. You can get a plain one at your local parts store, or go the Mr. Gasket/Moroso route to get a fancy one. The 216 valve cover has slots in the top for breathing.
Fred
52 3600
69 C-10
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#42439 02/18/2003 6:14 PM | Joined: Dec 2002 Posts: 50 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2002 Posts: 50 | On my 54 235 engine the valve cover has vent holes and the cap is not vented and it has a road draft tube.
1951 1.5 ton 4400
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#42440 01/31/2004 7:45 PM | Joined: Mar 2002 Posts: 31 Junior Member | | Junior Member Joined: Mar 2002 Posts: 31 | Greg 1.5:
If your 54 235 engine valve cover has vent holes in it, it probably had the manufacturer's crankcase ventilation setup at some time in its history - or the valve cover is not the original to your truck (car?). There was a setup that plumbed an [ugly ol'] hose from the valve cover to the intake manifold port just below the carburetor (the one with the 1/2 NPT plug in it).
There are illustrations of this both in Chiltons' 1954-1963 repair manual, and the Chevy trucks Factory Assembly Manual 1955-59.
Cheers!
Spito, spitero, huchtooey splateus!
1958 GMC Series 100 stepside
1954 Chevrolet Bel Air 4-DR sedan
1966 Chrysler Newport 2-DR hardtop
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#42441 01/31/2004 8:17 PM | Joined: Jun 2001 Posts: 379 Shop Shark | | Shop Shark Joined: Jun 2001 Posts: 379 | The inline cover without the vent slots has pro's and con's. On the pos side the lack of slots will help keep water out of your block if the cowl vent hose is cut or broken off, or if your truck is parked on a hill where the drain would drip onto the cover. The road draft tube can be capped off with a freeze plug, or a tube can be attached to the top and routed to the intake via several different routes. If this is done, you would need to seal off the road draft tube which usually was plugged up anyway. Now you need to get fresh air into the cover to replace the fumes being sucked into the intake. There are two ways to do this: provide a hose and connection to the air cleaner so the fresh air gets the benefit of the filter there or use a vented style twist-on cap on the cover. I don't like the vented cap because I have seen so many of them where the screen has dis-integrated and bits of it end up among the rockers. There are some details of rpo options in the 47-54 assembly manual that can help you with this. Someone should conjure up a retrofit kit for this to help these trucks keep the air cleaner. GMC and the military trucks had these set-ups on many models, they were ahead of the Chevy in this area. GMC often had a breather vent attached to the oil fill tube where the road draft tube would be otherwise located. I'm not sure if these would fit the Chevy.  | | |
#42442 02/01/2004 1:37 AM | Joined: Jul 2003 Posts: 252 Shop Shark | | Shop Shark Joined: Jul 2003 Posts: 252 | You can check page three of my site at http:/photo.starblvd.net/yachtcare for my homemade and very inexpensive PCV setup for my 235 in the 61 Apache. Cost was about $20.00 | | |
#42443 02/17/2004 12:05 AM | Joined: Mar 2002 Posts: 31 Junior Member | | Junior Member Joined: Mar 2002 Posts: 31 | Hey Yachtcare:
Tried your link. Road Runner and AOL can't find it. Has the address changed?
Spito, spitero, huchtooey splateus!
1958 GMC Series 100 stepside
1954 Chevrolet Bel Air 4-DR sedan
1966 Chrysler Newport 2-DR hardtop
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