DIY Oil Change: How-To Guide w/Pics (Updated 10-21-2009) - Page 40 - Mazda3 Forums : The #1 Mazda 3 Forum
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post #391 of 413 (permalink) Old 09-12-2010, 11:12 PM Thread Starter
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Re: DIY Oil Change: How-To Guide w/Pics (Updated 10-21-2009)

[quote author=SpikeddemZoomZoom link=topic=3597.msg3794090#msg3794090 date=1284256516]
Did my first oil change today on my recently purchased 2007 mazda 3i touring. One thing that I'd like to point out in case anybody else has issues. Perhaps this is just something the dealer did to the car, since the previous owner took it to the dealership for oil changes.

My biggest difficulty with the process was removing the undercarriage cover. It would have been easy, except for the three bolts in the front. They spun and spun and spun and spun. I figured they were stripped, and wasn't too happy. I took off all the other ones that I could. After a bit of fiddling around, I accidentally pulled the back half (towards the rear of the car) of the plastic down. Since the only bolts keeping it on were the three in the front, I could see the nuts for the bolts that seemed stripped. They looked super rusted. I took a 10 mm wrench to keep them in place while I used my 10 mm socket to remove the bolts. After removing the cover, I examined the nuts. Apparently, they're attached to a clip. The same clip/nut setup was on most of the back bolts, but after either tightening or loosening, those nuts would grab onto the clips and not spin. With the front ones, the nut did not grab, so that is why the bolt just spun. [/quote]

That means that someone overtightened those bolts by quite a bit, my car is 6.5 years old with 20 oil changes done on it (all by me) and I don't have that problem.

I think you have to replace the nuts so they properly lock onto the plastic.


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post #392 of 413 (permalink) Old 09-13-2010, 10:24 AM
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Re: DIY Oil Change: How-To Guide w/Pics (Updated 10-21-2009)

[quote author=raitchison link=topic=3597.msg3794838#msg3794838 date=1284347547]
[quote author=SpikeddemZoomZoom link=topic=3597.msg3794090#msg3794090 date=1284256516]
Did my first oil change today on my recently purchased 2007 mazda 3i touring. One thing that I'd like to point out in case anybody else has issues. Perhaps this is just something the dealer did to the car, since the previous owner took it to the dealership for oil changes.

My biggest difficulty with the process was removing the undercarriage cover. It would have been easy, except for the three bolts in the front. They spun and spun and spun and spun. I figured they were stripped, and wasn't too happy. I took off all the other ones that I could. After a bit of fiddling around, I accidentally pulled the back half (towards the rear of the car) of the plastic down. Since the only bolts keeping it on were the three in the front, I could see the nuts for the bolts that seemed stripped. They looked super rusted. I took a 10 mm wrench to keep them in place while I used my 10 mm socket to remove the bolts. After removing the cover, I examined the nuts. Apparently, they're attached to a clip. The same clip/nut setup was on most of the back bolts, but after either tightening or loosening, those nuts would grab onto the clips and not spin. With the front ones, the nut did not grab, so that is why the bolt just spun. [/quote]

That means that someone overtightened those bolts by quite a bit, my car is 6.5 years old with 20 oil changes done on it (all by me) and I don't have that problem.

I think you have to replace the nuts so they properly lock onto the plastic.
[/quote]

In the spirit of being an American...I'll deal with it in 3,000 miles
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post #393 of 413 (permalink) Old 09-13-2010, 04:58 PM
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Re: DIY Oil Change: How-To Guide w/Pics (Updated 10-21-2009)

The nut came loose on one clip on my car too. I also held it with a 10 mm spanner while I removed the bolt. I brazed the nut in place so it won't come loose again. Remove the clip from the car first - you have to heat it red/orange hot for the bronze to melt and flow.
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post #394 of 413 (permalink) Old 09-13-2010, 07:52 PM
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Re: DIY Oil Change: How-To Guide w/Pics (Updated 10-21-2009)

[quote author=balding geezer link=topic=3597.msg3795463#msg3795463 date=1284411517]
The nut came loose on one clip on my car too. I also held it with a 10 mm spanner while I removed the bolt. I brazed the nut in place so it won't come loose again. Remove the clip from the car first - you have to heat it red/orange hot for the bronze to melt and flow.
[/quote]

I had that happen so many times, I went to the hardware store and found replacement clips. Instead of a nut tack-welded to the clip, these have a threaded sleeve that's cast with the clip (it's all one piece). 17 cents each, plus $4 in stainless bolts and washers and now I'm back in business.


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post #395 of 413 (permalink) Old 10-11-2010, 05:33 PM
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Re: DIY Oil Change: How-To Guide w/Pics (Updated 10-21-2009)

Awesome post! I've always changed my own oil, but never had a cartridge type filter. I was a little hesitant about this, but I knew the knowledgeable folks on this page would set me straight. And now, thanks to you Rob, I have nothing to fear.

It was very easy to do!
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post #396 of 413 (permalink) Old 04-25-2011, 01:05 PM
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Re: DIY Oil Change: How-To Guide w/Pics (Updated 10-21-2009)

Just did my oil yesterday. It was easy thanks to the clear instructions on this thread!

I also ran into the issue of the front 3 screws being rusted. I just took the back ones out and then pused the splash guard down. Had enough room to work.

I'll also grab the stainless stell ones and replace them with that.

Thanks again!
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post #397 of 413 (permalink) Old 07-24-2011, 02:43 PM
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Re: DIY Oil Change: How-To Guide w/Pics (Updated 10-21-2009)

Thanks a lot changed mine the other day. I ran into some complications from the previous owner who cracked the bottom cover. In the end I had to drill several holes into it and ziptie it back on...
At any rate glad I changed to 5w20 Mobile1 full synthetic and A Fram filter have a pic of the old filter/oil compared to new liquid gold.
Also was able to get it done by driving the car onto wood boards, could have used more space but got it done.
[img width=862 height=768]http://i1229.photobucket.com/albums/ee461/notaneggspert/Oil%20Change%2072211/Oilchange.jpg[/img]


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post #398 of 413 (permalink) Old 11-04-2011, 03:27 AM
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Re: DIY Oil Change: How-To Guide w/Pics (Updated 10-21-2009)

was wondering how often you really need to replace the drain plug o ring and the drain plug crush washer? also does the oil filter housing o ring also need to be replaced every oil change?
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post #399 of 413 (permalink) Old 11-04-2011, 09:34 AM Thread Starter
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Re: DIY Oil Change: How-To Guide w/Pics (Updated 10-21-2009)

[quote author=slowhonduh93 link=topic=3597.msg4142088#msg4142088 date=1320391635]
was wondering how often you really need to replace the drain plug o ring and the drain plug crush washer? also does the oil filter housing o ring also need to be replaced every oil change?[/quote]

I replace the o-rings for the filter housing and filter housing drain plug every time, but that's primarily because one of each of those comes with the Purolator filters I buy. If I had to buy them separately I'd probably replace them every other time.

As for the oil drain plug crush washer, I may have replaced mine once ~5 years ago (or I may not have bothered) so mine either hasn't been replaced in 10 oil changes (if I did replace it) or in 16 (if it's still on the factory crush washer). I don't plan on replacing it the rest of the time I have the car (which I also have no plans to replace)


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post #400 of 413 (permalink) Old 11-04-2011, 09:44 AM
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Re: DIY Oil Change: How-To Guide w/Pics (Updated 10-21-2009)

I have not replaced my crush washer through about 6 oil changes.



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