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#19379 05/27/2004 3:19 PM | Joined: May 2004 Posts: 43 Junior Member | | Junior Member Joined: May 2004 Posts: 43 | I have a 49 3100 with a 54 235 in it (I think!)
With the valve cover off, I see a short, curved tube in the middle of the valves that is about 2 inches high and curved - like an upside down J. What is this? Is this some sort of oil return line to splash oil on top of the valve train? The end of the tube appears to be somewhat "crimped" closed - looks like it was mashed closed with pliers? Should the end be open?
Also - can I turn over and/or start the engine with the valve cover off without making a mess?? (throwing oil everywhere?)
Thanks! | | |
#19380 05/27/2004 3:56 PM | Joined: Jan 2002 Posts: 175 Member | | Member Joined: Jan 2002 Posts: 175 | That is the oil return line for the excess oil that does not go out to the rocker arms. YOu can run the beast with the valve cover off. Not too much mess with my 216----I don't know how much oil is slung around in the top of a 235 | | |
#19381 05/27/2004 4:24 PM | Joined: May 2001 Posts: 1,904 'Bolter | | 'Bolter Joined: May 2001 Posts: 1,904 | Here's a dark photo of what you're talking about. The one on the right is from my '53 235. I don't know if it came from my truck's orignal 216 or with the newer 235. The overflow tube lowers the pressure to the rocker arms. The one on the left is from an "848" head of a newer 235. GM crimped the overflow tube. I have a third one where someone has crimped and brazed the overflow tube. [img] http://www.sandeace.com/48/OilConnectors.JPG[/img]
1948 3/4-Ton 5-Window Flatbed Chevrolet 34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.
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#19382 05/28/2004 4:09 PM | Joined: Mar 2000 Posts: 784 'Bolter | | 'Bolter Joined: Mar 2000 Posts: 784 | I've seen a lot of discussion about these things, but I have yet to hear weather they should or should NOT be crimped. I took the crimp out of mine. 235 w/848 head. Am I wrong?
George | | |
#19383 05/28/2004 4:41 PM | Joined: Jan 2001 Posts: 230 Shop Shark | | Shop Shark Joined: Jan 2001 Posts: 230 | The idea was to relieve excess oil via the tube but you cannot possibly over oil the rockers so I leave 'em crimped shut when I find 'em like that
As long as oil indeed comes out the tiny hole in the top of the rocker when you rev up the engine you're good to go ~ no oil at all indicates a serious problem you need to address _now_ .
-Nate
There is no problem so difficult it cannot be overcome by generous application of brute force & ignorance
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