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| | | | Joined: Nov 2014 Posts: 164 'Bolter | | 'Bolter Joined: Nov 2014 Posts: 164 | I changed the oil on the '60 261 in my '53 3100 and put in 6 qts; 5 for the crankcase and 1 for the bypass filter. After running it a bit I Checked the level & found that I'm 1 qt high and the filter is dry. Where's the most likely spot for the clog, in the line to the filter itself?? Thanks for any tips you can offer.
Denny
~Denny 1953 Chevy 3100 w/1960 261 cid, 848 head | Weber 32/36 progressive 2 barrel carb. | Three on the tree & 3:55 torque tube | 12 V w/Gener-Nator & 6 V starter In the Gallery Forum1998 Chevy Suburban 350 ci awd/4wd | | | | | Joined: Jan 2014 Posts: 3,687 'Bolter | | 'Bolter Joined: Jan 2014 Posts: 3,687 | It’s gotta be upstream of the filter. Are you running soft lines or hard?
Could probably disconnect the feed line at the canister and blow some compressed air back toward the engine?
1951 3100
| | | | | Joined: Feb 2019 Posts: 4,480 AD Addict & Tinkerer | | AD Addict & Tinkerer Joined: Feb 2019 Posts: 4,480 | Most likely it’s clogged where the supply line goes into the block, a common problem. It’s the line closer to the firewall. I would disconnect that line from the fitting and the filter, then blow thru the line. Then I would use a drill bit (by hand) to try to clean out the port that goes into the block.
Last edited by Phak1; 06/11/2025 3:55 PM.
Phil Moderator, The Engine Shop, Interiors and Project Journals1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc BrakesProject JournalsStovebolt Gallery Forum | | | | | Joined: Nov 2014 Posts: 164 'Bolter | | 'Bolter Joined: Nov 2014 Posts: 164 | I've got soft lines. I'll blow them out & will clean the ports where they connect to the engine. Thanks
~Denny 1953 Chevy 3100 w/1960 261 cid, 848 head | Weber 32/36 progressive 2 barrel carb. | Three on the tree & 3:55 torque tube | 12 V w/Gener-Nator & 6 V starter In the Gallery Forum1998 Chevy Suburban 350 ci awd/4wd | | | | | Joined: Feb 2004 Posts: 29,803 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,803 | Soft lines are a really bad idea. The only reason they were used on the original installation was to make it easier for the optional filter to be installed at the dealership. Replacing them with 3/16" or 1/4" OD hard line would be a permanent fix.
Jerry
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