Chevy 1500 2.7L TurboMAX 4 Cylinder (L3B) Engine *Heavy Mechanic Review* | ACTUALLY GOOD!?
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Published 2024-07-02
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Well I'm very excited to get my hands back on this very interesting 2.7L turbomax inline 4 cylinder engine because it seems like alot of owners and buyers are having real success with this power plant of an engine.
I wanted to discuss 5 main things with this engine back in the shop. firstly however I go over some of the awesome new technology stuffed into this engine.
the first point I wanted to discuss is the updated warranty. GM has updated the standard powertrain warranty to 5 years/ 100,000 miles which is massive and I really like to see this. gives me good faith that GM is seeing these engine not having any major issues and they still feel like they can make money from them while extending the warranty.
Next is the strength of the engine. this little engine is truly built to be in a pick up truck with fully forged internals, iron liners, off-set cylinder, billet steel camshafts and a very stiff and strong crankshaft. GM truly gave this engine some good strength.
number 3 is cracking engine blocks. this was a bit of a panic for the internet but as it turns out there were only 12 engines that have has this issue to date. only a small handful. GM replace the full engine, no questions asked.
4th is the cylinder deactivation or Active Fuel management. and I wanted to highlight that this Turbotax engine goes about shutting down cylinders completely different then the V8's like the 5.3L and 6.2L engine that are having lifter failures with their collapsable lifters.
this engine uses its special cam shafts to shut down cylinders so we should not see as much valve train issues as the larger V8 engines.
lastly is just how much work GM had to do to balance this mighty 4 cylinder engine. with all the special tech and massive large stroke this engine should be very unbalanced but its not. In fact his engine in my opinion is very well balanced at all speeds.
lastly I discuss my unhappiness with GM continuing to not go with a dual injection fuel system with port injection and direct injection to solve any carbon build up issues.
00:00 - Intro
00:40 - Engine Specs
03:03 - Warranty Extended (100,000 Miles)
04:05 - Engine Strength
06:08 - Cracking Engine Blocks
07:37 - AFM Cylinder Deactivation
10:23 - Engine Balancing
11:33 - Direct Injection Problems
12:29 - Conclusion
All Comments (21)
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If they had build a straight six version of this engine, they would have build the greatest offroad engine ever.
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As a 2.7 ecoboost owner, I do admire the simplicity of 4 cylinders and 1 turbo if it gets the job done.
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My company has several in our service fleet with well over 200k on them already. Been great.
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That engine is super surprising. My brother in law has one. I have a 2021 3.0 Duramax and man his feels so much like the diesel its unreal. Super impressive.
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I know at the dealer, we haven't seen too many major issues with these. They are normally noisy though
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I bought the Turbo Max in a Colorado, despite being a little bit reluctant to buy turbo 4 vs a V6. I'm only a year in, but the power of this thing has won me over. It makes effortless torque, and is a blast in a mid size truck. It truly feels like a Diesel.
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Greetings Alex. The main problem with AFM and DFM is that when they fail the cost of engine repair is higher. So then the treasure of some companies and workshops is to disconnect these "Fuel Saving" systems in software and mechanically. What fun from GM development engineers. A pleasure to see your videos, analysis and comments; Thanks Alex. I send you a big hug! ðŸ¤
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Happy owner of a Silverado 1500 with 2.7T. The truck easily gets 10L/100km in highway driving. Has a nice smooth turbo whistling noise while driving.
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Time will tell, but I'm a 3.0 Duramax Diesel owner and I absolutely love it!
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Well, I have a 2020 Silverado Custom with the 310/348 version of this engine. I haven’t had any issues. Tows my 21 foot boat just fine, rides nice, dives good down in East Tennessee hills. I will say one thing, great gas mileage, but she sucks gas towing. I can live with it, she’s making power.
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I love the "Certified Dirty Idle" California sticker on the tool box" XD
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I have had my 2.7 Turbomax for 2 years. No problems at all and I love the power curve in this engine. It pulls 10,000 lb. Trailer with no problem.
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I've owned a 2023 Silverado for a year now and am quite happy with the 2.7. On a few random occasions, it had like 5 seconds of slight vibration after startup, but no driveability issues so far. There is plenty of power, especially the torque down low is awesome. Wish it sounded like a V-8, but you can't have everything. It makes for a great work truck and is actually very quiet while cruising.
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Tip of the hat to GM for a stout torquey motor that has been reliable. I didn’t realize it’s been out for 7 years now.
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Props to the re-review. Much more fair then last years Alex!
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Nice job of breaking it down for someone who is not mechanically inclined. The channel should be renamed to “The Getty Professor “. Well done.
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2.7 is the underdog, and i kind of like it.
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Alot of 4cylinder turbo hate going on be it chey,ford toyota fact is ive been a chrysler tech for 38 years these engines are the future thats a fact,they are man made and they can break,service them they will last.
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It seems GMs 4 turbo is more reliable that Toyotas 6. Who'd have believed it?
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Remember when Ford spent millions on marketing for the Ecoboom 3.5 in 2011? They made it look like it was bulletproof. Same deal here, just a different mess. GM has no issues with extending powertrain warranties. Hell, when they go bankrupt again taxpayers will bail them out.
