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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!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Jun 2005 Posts: 2 Junior Member | | Junior Member Joined: Jun 2005 Posts: 2 | I have a 270 inline six in my 57 GMC tow truck. It does not have an oil filter... It'll be easy enough to install a remote filter, however I'm not sure of the direction in which oil flows. There are two plugs on the block, #1 is towards the front of the block under the exhaust manifold and #2 in a located towards the rear of the block, a little high than #1. If I had to guess I would say that oil flows from #2 through the filter to #1... Thanks in advance for any help in this matter.
Allen A. | | | | | Joined: Apr 2005 Posts: 926 Shop Shark | | Shop Shark Joined: Apr 2005 Posts: 926 | I'd try running the engine and loosening each plug a little and see which one leaks fastest;that'd be the pressure side. | | | | | Joined: Sep 2003 Posts: 23 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2003 Posts: 23 | If i remember right, the inliners international website has details on how to convert the GMC engine to the full flow oil filter.
John
| | | | | Joined: Jun 2005 Posts: 2 Junior Member | | Junior Member Joined: Jun 2005 Posts: 2 | Thanks for the info on the web site... I'll see if I can find it...
Allen | | |
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