[cpressley1971]

Spark plug replacement

This thread has been really helpful. I'm considering replacing the plugs on my 2010 Mazda3, 94K miles. I haven't done much auto work besides a headlight bulb here and there, an air filter, etc. I don't have a spark plug socket. Any recommendations? Also, was a bit confused on the discussion around which plugs to buy, hopefully from Amazon. Anyone able to provide an exact part number for a 2010, 2.5L?

 

[cpressley1971]

How to avoid cross threading

Thanks for the response Whysoserious11311. Here's a naive question. While I understand the problem with cross threading, isn't it just as simple as screwing the spark plug in by turning it the right way? The original post says to insert your new plug by turning it counterclockwise, so I'm assuming I remove the old plugs by turning them clockwise. Isn't it as simple as just remembering this? I guess righty-tighty lefty-loosey doesn't apply here?

 

[cpressley1971]

torque wrench required?

DrWebster I want to thank you for this excellent write up, I changed my plugs yesterday following your instructions and everything was a breeze. Idk why I was being such a pussy about it. Took me at most 30mins, spark plugs were perfectly gap and I torqued them to 9lbs, after the install my idle was so smooth man, it seriously felt like the engine was off
Just one question, what type of torque wrench do you have? I have the old school needle one, are the click ones more accurate?

Once again, Thanks!

Ok, NooB question here. I'm psyching myself up for this job, just got my plugs per the previous specs on the OEMs. I bought a socket and extension. I don't have a torque wrench. I assume that is a requirement here, i.e. I shouldn't tighten it until it feels tight? I need to go buy a torque wrench and make sure I tighten it to the stated specs?

Probably a dumb question but I just wanted to make sure. Never done this before.

 

[cpressley1971]

Ok, thanks to the help on this forum, I just replaced my plugs. I bought the OEM plugs as suggested. My plugs were at 109,000 miles, so a little overdue. They were definitely looking old. It took be about an hour, as I had some difficulty getting the bolts that secure the coil packs out. My wrench was too big to get in that small space, and my 8mm socket wasn't deep enough to fit. Eventually got them though. After that it was snap. If anyone is reluctant, trust me, if I can handle this so can you.