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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: 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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