| |
Click on image for the lowdown. 
====
| | |
8 members (55shaker, MickeyP, Bill Hanlon, 3B, Gdads51, Ridgeback, Gray_Ghost, 32Fordpuchoptop),
112
guests, and
1
robot. | | Key: Admin,
Global Mod,
Mod | | | Forums66 Topics128,118 Posts1,056,304 Members48,439 | | 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: May 2009 Posts: 47 Wrench Fetcher | | Wrench Fetcher Joined: May 2009 Posts: 47 | What's this oil line for? oil line picIt's on a '61 235. It runs to the oil pressure tee. Do I need it? I've got the factory assembly manual and don't see any drawing with it. Also, where would an oil filter plug in. Would it plug in here? oil filter location? | | | | | Joined: Feb 2005 Posts: 469 Shop Shark | | Shop Shark Joined: Feb 2005 Posts: 469 | You mystery oil proably runs around the back of the engine to about the middle of the head to help carry oil to the rocker arms. Yes the oil filter will plug in there if ti is a 235. | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | The lystery line is just what ttodd says, to run oil to the rockers. It is not original equipment, probably added by a po because the oil fed got pugged up due to lack of maintainance.
The oil filter does go to the 2 ports circled. Note that the mystery line is hooked to the back one. That port is the pressure feed for the filter. The other port is the return, and dumps back into the pan.
If you're going to overhaul the engine, I would suggest getting rid of the mystery line, as it is unecessary, then add a filter to prevent the oil feed from getting plugged in the future.
Bill Burmeister
| | | | | Joined: May 2009 Posts: 47 Wrench Fetcher | | Wrench Fetcher Joined: May 2009 Posts: 47 | Thanks guys!.
I suspected that's what the mystery line was for. I was gonna run the engine with the valve cover off to see how the rockers were getting oiled, from the tube or somewhere else. Normally, how would oil get to the rockers?
I was hoping to avoid overhauling the engine. Any suggestions on where the "clog" might be or how I could track it down? | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | On your engine, there is a drilled passage in the block for it. Here is a pic from a shop manual (it's a '59 manual, but is the same) that shows where the passage is.
Bill Burmeister
| | | | | Joined: May 2009 Posts: 47 Wrench Fetcher | | Wrench Fetcher Joined: May 2009 Posts: 47 | Longbox, thanks for the info. I have the factory shop manual and found the same illustration. Dunno why I didn't look there first.
I plugged the oil line, took off the valve cover, started the engine and no oil was getting to the rockers. Is there any way of getting to the blocked oil passage without removing the engine? It looks like I can get to the vertical passage by removing the head. What about the horizontal passage? | | |
|
|
| |
