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| | | | Joined: Sep 2014 Posts: 385 Shop Shark | | Shop Shark Joined: Sep 2014 Posts: 385 | Thought I would post this in case others ever try to search about rockers not oiling correctly.
Found out late last fall that my rockers for cylinder #1 were hardly passing oil from the top holes but the rest were passing oil like crazy. Took it apart yesterday to find that the engine shop had put the rocker shafts in upside down. The rest were bleeding like crazy due to the oil holes being faced up and aligning up with the oil holes in the rockers. All the oil was bleeding out so fast from cylinders #3-#6 that #2 was getting fair flow and #1 was just getting a bit. Now that i rotated the shaft all the rockers are getting the same amount and the oil pressure at idle as gone up a bit!
The holes have to face down and a easy way to tell is that there is a slight flat spot on the rocker shaft. If you see that flat spot with your valve cover off then your rocker shaft is upside down.
Last edited by wolffcub; 04/20/2015 4:33 PM.
| | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | Some times it is the easy things that get missed.
FYI, not all shafts have the flat spot that you described.
Glad it was a simple fix for you.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Sep 2014 Posts: 385 Shop Shark | | Shop Shark Joined: Sep 2014 Posts: 385 | OOPS! Can admin move this to the engine section please. | | | | | Joined: Mar 2010 Posts: 10,310 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,310 | Thank you for this post! If I don't remember anything else, I will remember to blame "the engine shop" for doing it wrong.  (I am sure your shop guy did it to you. I'm just saying) Carl
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: Sep 2014 Posts: 385 Shop Shark | | Shop Shark Joined: Sep 2014 Posts: 385 | Guess it is my fault in the end anyways for not checking it over after i got it back from them. Makes me scared to take off the head and see what they did for the valve seats vs what i asked them to do. | | |
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