Jul 10, 2014 · The Vortec 5700 L31 (Vin code 8th digit "R") is a V8 truck engine. Displacement is 5.7 L. It is the last production Generation I small-block. The cylinder heads feature combustion chambers …

Nov 8, 2011 · The L31 Vortec 350 that was installed in all GM half ton trucks (Pick-ups, Tahoes, Suburbans, Vans) put out 255 hp and 330 lb-ft. Whoever told you 430-450 ftlb of torque was off by …

Dec 6, 2014 · The L31 also known as the 5.7L Vortec V8 has one of the largest aftermarkets of any "modern" GM truck engine as its a Chevy small block and its parts are used as performance …

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Aug 15, 2020 · PROBLEM: I have an oil leak out of the bottom of the Timing Cover on a 1997 5.7L Vortec. I've tried 3 times already to get it to seal properly. The Fel-Pro Oil Pan gasket say it DOES …

Jul 20, 2007 · As such, the L31 head is compatible with all older small-blocks, and is a very popular upgrade. It offers the performance of more expensive heads, at a much lower cost. It does, however, …

Feb 21, 2018 · L31 will be much easier to swap into your truck, sence that is what you already have. Some time back, I was looking at phoenix engines, and posted to a thread on GMT400, about what I …

Apr 7, 2009 · Admittedly the L31 vortec fuel injection isn't a known performer, but it's not nearly as bad as this engine was acting. I checked cam timing, fuel pressure, crank to cam correlation, to no avail.

Sep 14, 2012 · Chevy Small Block - Engine Block Casting Numbers Notes (for below): "High Power" is the maximum rate HP this block was used for, "Low Power" is the lowest rated horsepower RPO …

Jan 1, 2009 · Sorry.. L31, 5.7L Vortec gas engine. Think the last 5.7L diesel was an olds engine wasnt it? Anyhow. -35'c out there with the winchill.. So I took as many pics as possible in a short period of …