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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Feb 2011 Posts: 59 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2011 Posts: 59 | On my 59, 235 I have a copper tube running from the right side of the head to the inlet of the oil filter. Is this the correct way to feed oil to the rockers. I have been looking at other 235s and I see a that the hole on the head is pluged, is it getting oil feed from some other source?
Thanks Larry | | | | | Joined: Jun 2006 Posts: 693 'Bolter | | 'Bolter Joined: Jun 2006 Posts: 693 | there is an internal tube for this oiling (you can see it if you pull the lifter cover) which often clogs. in the past a kit to re-route the oil tube externally was offered and this is likely what you have. my '56 235 has the same set-up. tom | | | | | Joined: Feb 2004 Posts: 29,869 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,869 | It's not uncommon for the internal passages to get clogged. Back when there were a lot of these engines on the road, we would remove the head bolt adjacent to that plug in the head, pour the hole full of oil, and use a snug fitting dowel rod and a big hammer to clear the passageway. It's possible to blast a high-pressure pulse of oil down the galleries by smacking the dowel a few times with a BFH. If that didn't clear the problem, we would install the external bypass line.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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