| |
Click on image for the lowdown. 
====
| | | Forums66 Topics128,094 Posts1,056,064 Members48,433 | | Most Online14,466
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!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Oct 2012 Posts: 55 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2012 Posts: 55 | hey guys,
almost done with my 1958 235 rebuild but now for a critical question that i've been confused on since the beginning.
In 1958 235's i understand the oiling line from "point A to point B" in the lifter compartment was deleted and blocked off. The oil then is channeled through the middle of the head through the block where a head bolt is grinded to allow oil flow, into a coupler that oils the rocker shaft/arms. BUT when i tore this puppy down there was an oil line that went from the right side of the block (down in the crankcase) up and over the valve cover into the side of the head where the oil flow for the rocker arms is...why the hell would they do this? to extract overflowing oil? what is it for? and should i block that hole off on the side of the block or replace the oil line with a new one?
thanks
Last edited by gbuck; 11/29/2012 1:37 PM.
| | | | | Joined: Mar 2005 Posts: 1,636 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 1,636 | Sometimes the passageway in the block stops up. And a good way to insure oil flow to the rockers is to add the external line.
Both my 1958 235 had this line, and I added one to a 261 I had to make sure the rockers oiled.
| | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | With a clean fresh rebuild you should not need the external line.
Just make sure you are getting oil to the rockers when you prime the engine.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Oct 2012 Posts: 55 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2012 Posts: 55 | roy could you send me a picture of your setup so i can see which hole in the block you have it plugged into exactly. any other opinions on this? | | | | | Joined: Mar 2005 Posts: 1,636 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 1,636 | I no longer have either engine. But the cylinder head has a 1/8 inch pipe plug on the passenger side about center in the head close to where the valve cover gasket sits. The other end ties in with the oil pressure gauge.
As was said earlier, with a fresh rebuild, you shouldn't need that line. But make sure the correct head bolt is used so that the oil can flow around it to get to the rockers.
I installed one just for grins and giggles. I wanted to make sure the top end had oil. Overkill, but never had any problems. | | | | | Joined: Oct 2012 Posts: 55 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2012 Posts: 55 | cool, ya i looked at all the bolts and the only one that was significantly different was grinded on the side, figured that was the one. | | |
|
|
| |
