How Reliable is the GM 3.7L 5 Cylinder Engine?

Technical Issues
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Looking for Insights on GM 3.7L 5 Cylinder Engine Reliability

I’ve been doing some research on the GM 3.7L 5 cylinder engine and I’m curious about its reliability over time. For those who have experience with this engine, I’d love to hear your thoughts and opinions.

Common Problems

From my understanding, some users have reported issues with:

  • Oil consumption: Has anyone experienced excessive oil burning?
  • Timing chain: Are there any long-term concerns here?
  • Performance issues: How does the engine hold up under various driving conditions?

Real-World Experiences

I’m particularly interested in:

  • How many miles have you put on your 3.7L engine?
  • Any major repairs you’ve had to handle?
  • What has been your overall experience regarding maintenance and durability?

Engine Comparisons

Additionally, how does this engine compare to others you’ve owned? If you’ve switched to a different model, what was the biggest difference you noticed in terms of reliability and performance?

I believe sharing these insights could really help those of us considering a vehicle with this engine, especially in making informed decisions.

Looking forward to your responses!

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I’ve had my GM 3.7L for a few years, but I’ve been dealing with constant misfiring. It seems like a common issue. Anyone else experienced this?

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I’ve also had that problem! It’s so frustrating. I replaced the ignition coils, but the issue still lingers. What did you find made the biggest difference?

4

I’ve read that the oil pressure sending unit can be problematic as well. Symptoms include erratic oil pressure readings. It might be worth checking.

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That’s definitely true! My gauge was going all over the place before I replaced it. Sometimes, it’s just the wiring too.

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I noticed a knocking noise which drove me nuts! Turned out to be a loose valve cover. It’s the little things that can cause headaches.

7

That’s so true, marycarter! I have a weird electrical issue where my headlights flicker. Not exactly the same but definitely frustrating. What a mix of problems this engine can have!

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8

My GM 3.7 has a history of fuel system problems. It felt like I was always changing the fuel pump. Has anyone found a good long-term fix?

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I hear ya! I had to change mine twice in a year. I’m thinking about looking into aftermarket options. Anyone tried those?

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I’ve seen discussions on forums suggesting that adding a fuel system cleaner regularly can help prevent pump issues. Just a thought!

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I’ve also noticed problems with the throttle body. Sometimes it gets stuck, causing erratic acceleration. It’s a scary feeling!

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Yes! My friend had that issue. Cleaning it solved the problem for him. Has anyone else had a successful DIY fix?

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I find the cooling system can be finicky too. Leaks from the water pump have been a headache for me. Such a popular engine and yet so many quirks!

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14

There’s the infamous head gasket issue as well! I think everyone should keep an eye out for leaks, especially before long trips.

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Absolutely! Though I like this engine for its power, the issues really challenge my patience. Maybe I just need to laugh about it! Like, why don’t engines come with a manual for life?

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I’ve worked with the GM 3.7L engine across a few models, and reliability can really vary. The 2007-2010 models tend to have more issues, particularly with oil consumption and cooling. Lower mileage cars often fare better, though.

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I can back that up! My 2009 GMC Canyon had persistent oil leaks. The later models seem to have improved on those issues.

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I’ve heard the same about the oil problems. However, I’ve had a 2011 model for years, and it’s been pretty solid! I guess it depends on both maintenance and luck.

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Lucky you! My 2010 version had constant check engine lights, and it was always something different. Anyone else had that issue?

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Definitely! My dad had a 2008 model that just wouldn’t quit throwing codes. It became a guessing game at the mechanic’s, and eventually we just sold it.

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