Rebuilding a classic Chevy 350 engine? Want to know the best spark plugs for Chevy 350 engines?
You're in for a treat! In this ProperMechanic.com guide, you will learn the following:
- Which spark plug is the best fit for your Chevy 350 engine
- Proper inspection, removal, and installation of your spark plugs
- Tips on how to get the best engine performance when performing maintenance on your 350 engine
And much more!
One of the pleasures of tuning up an older engine that it is much simpler, and since there are so many 350 engines in production you shouldn't have a problem finding one.
This short-block V8 workhorse is one of the most reliable engines in American car history, and you will find 350 engines produced anywhere from the early 1950s to the early 2000s.
And when you do find a 350 engine to fix up you are going to want to change the spark plugs out immediately. Let us help you out with a few tips when you get to that point.
Below is a quick list of all our top products. Keep scrolling to learn more about how to choose and use spark plugs for your Chevy 350 small block.
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Our Top Pick
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Our Top Pick
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NGK G-Power Platinum Alloy
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View on Amazon |
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Best Budget
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Best Budget
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Bosch Double Iridium
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View on Amazon |
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Best High End
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Best High End
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ACCEL Copper Core
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View on Amazon |
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ACDelco Professional Platinum
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View on Amazon | |
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ACDelco Professional Iridium
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View on Amazon |
Overall #1 Rated Pick
Updated As of 4/8/2020
- Performance spark plugs
- Optimal heat transfer
- Suppressor seal that prevents leakage
NGK is top on our list because it is a reliable and trusted brand at a good price.
These are the perfect solution for your 350 because you aren't going to be spending a lot of money, and you are going to reap the benefits of good fuel efficiency and more engine power.
One reason to buy platinum plugs is that they are going to give you better performance when compared to copper plugs.
Top 5 Best Spark Plugs for the Chevy 350 Engine
Check out our below list for a summary of our results. Keep on reading to learn more about your other options!
How To Change the Spark Plugs on Your Chevy 350?
Changing the spark plugs on your Chevy 350 engine is a relatively easy task, but there are a few key procedures you are going to want to follow to get the best results.
First, you have to remove the spark plug wires or coil packs (depending on which 350 engine you have) to access the spark plugs. Spray some rubbing alcohol around the edges where the wire connects to the spark plug if the wires are hard to remove. From there you can stick a spark plug socket in and remove each plug.
Use a feeler gauge to gap the spark plugs before installing. Remember to blow the holes out with compressed air before installing the new plugs, and use a torque wrench to avoid over and under-tightening. Take your time.
Read More >> How Often to Change Spark Plugs
Are There Different Types of Spark Plugs For the Chevy 350 Engine?
Spark plugs are made up of different metals that have different qualities when it comes to performance. The conventional option is a copper core spark plug, but if you are going for more than a quick fix you are going to want to replace your old plugs with iridium or platinum.
Ask your local parts store professional to help you find a decent set of spark plugs for your Chevrolet engine build.
How To Choose The Spark Plug Wires For a Chevy 350 Engine?
You should always use the spark plug wires that come from the manufacturer. Talk to your local Chevy parts department to help you find the right fit for your Chevrolet. Try to avoid using aftermarket wires as they can potentially inhibit the power of your engine.
Read More >> How to Check a Spark Plug
How Long Should My Spark Plugs Last In My Chevy 350?
Spark plugs should be changed about every 60 thousand miles, but they can last for up to 100 thousand miles when installed correctly.
Copper plugs are the cheapest option, and last anywhere from 10-20k miles, while spark plugs that are made from precious metals like platinum and iridium allow for higher performance and generally last up to 100k+ miles. You will be paying more for iridium or platinum plugs.
Reviews Of The Best Chevy 350 Spark Plugs
NGK makes quality spark plugs that are always in high demand. Reviewers on Amazon have noted a drastic improvement after installing these platinum plugs in their vehicles.
The platinum alloy design of these NGK plugs allows for a longer duration and a higher running temperature that burns off deposits and prevents fouling.
You're gonna like the way these improve the performance on your 350 Chevy engine.
Pros
Cons
You simply can't go wrong with Bosch parts on any vehicle. The double iridium by Bosch ensures a long-lasting spark plug service that will provide you with the best performance.
If you are looking to buy the most dependable spark plugs for your 350 engine, these have over 3,000 4-5 star ratings on Amazon compared to less than 1,000 reviews of any other product similar.
Pros
Cons
The copper core of the ACCEL makes it a hotter plug. These traditionally built copper plugs will give you fast throttle response, enhanced fuel economy, and machine rolled threads that protect your engine head.
If you are going for really good performance and don't mind switching out your plugs out more frequently, then these copper core plugs are a good option for you.
Pros
Cons
If you want to be loyal to an American brand, but you still want platinum plugs then you will go with the ACDelco over the NGK.
Platinum burns hot to prevent fouling and provides you with a long-lasting solution. Platinum plugs are a great option for boosting the power and efficiency of your engine rebuild or tune-up.
Pros
Cons
Iridium is said to be one of the best precious metals for use in the production of spark plugs.
For this reason, the ACDelcoiridium plugs are our favorite high-end option for the Chevy 350 engine.
If you are running an HEI ignition system and iridium spark plugs, then you are going to have some seriously great engine performance.
Pros
Cons
Our Top Pick: NGK G-Power Platinum Alloy
When performing car repairs the best game plan is to buy the best quality product at the most affordable price.
Believe us, it's easy to spend too much money on high-end parts when there are parts that perform equally and cost less.
Just don't go too far into the budget range that you buy cheap parts. Use your best judgment.
The NGK plugs are an easy purchase on Amazon at a ridiculously good price, and they also come in packs of eight which is how many you will need if you are looking to do a full replacement job on the Chevy 350 engine.
Even if you are not going to replace all spark plugs in your 350, it's a smart idea to keep a few extra NGK plugs in the glove box in case you foul a spark plug while driving.
Read More >> How to Clean a Spark Plug
Final Thoughts On Spark Plugs For a Chevy 350 Engine
If you have just purchased a vehicle that has the Chevy 350 engine, then you should inspect and replace the spark plugs first thing as part of the basic vehicle maintenance.
This is one of the most reliable V8 engines of all time, but it won't run well if it isn't provided with the sufficient electricity inside the combustion chamber.
