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Old 02-13-2010, 09:01 PM   #21
RobD1517
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2008 Astra XR
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Default Re: Spark Plug Change for Astra

So wait a minute...This has been asked once before on here...is the OE plug copper or Iridium? Autozone's Z-Net shows the plug as being a copper which i thought was very strange

...
'92 SL2 - 108,000 miles (traded)
'96 SL2 - 312,000 miles (blew up)
'98 SL2 - ??????? miles (parts car)
'99 SL2 - 168,000 miles (Sold 11/08)
'08 Astra - 131,000 miles and counting!

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Old 02-13-2010, 09:58 PM   #22
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Default Re: Spark Plug Change for Astra

Quote:
Originally Posted by RobD1517 View Post
So wait a minute...This has been asked once before on here...is the OE plug copper or Iridium? Autozone's Z-Net shows the plug as being a copper which i thought was very strange
It's your basic, nothing fancy, no exotic metals spark plug. Judging by the price at the dealer, you'd think they were made from unobtanium... $9.68 each IIRC.

If you can get a better price elsewhere, go for it. Since the change interval is 25k miles, you shouldn't be paying that dear a price.

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Old 02-14-2010, 11:07 AM   #23
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Default Re: Spark Plug Change for Astra

How'd you get the cover off without removing the wiring "bridge" on the side of the engine?

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Old 02-14-2010, 03:38 PM   #24
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Default Re: Spark Plug Change for Astra

Ok cool. I was about to freak out cause i bought some Duralast DLP5224 platinum (i got em for 99 cents cause they werent on planogram anymore =D) still a few thousand miles out from the scheduled so i got time to decide whether to put em in or not

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'96 SL2 - 312,000 miles (blew up)
'98 SL2 - ??????? miles (parts car)
'99 SL2 - 168,000 miles (Sold 11/08)
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Old 02-23-2010, 12:44 AM   #25
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Default Re: Spark Plug Change for Astra

Anyone know of a recommended torque for the plugs themselves?

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Old 02-23-2010, 08:04 PM   #26
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Default Re: Spark Plug Change for Astra

Quote:
Originally Posted by CAGERST View Post
Anyone know of a recommended torque for the plugs themselves?
18 ft-lbs or 25 Nm.

...
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Old 02-25-2010, 11:43 PM   #27
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Default Re: Spark Plug Change for Astra

Unless new *copper* plugs are the choice of replacement at 25k miles, the change interval is increased drastically. Sorry if this is obvious, but thought I'd point it out.

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Old 03-08-2010, 11:19 PM   #28
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Default Re: Spark Plug Change for Astra

Has anyone measured a real fuel economy difference with upgraded spark plugs? I'm wondering if iridium is really necessary...(versus a platinum)

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Old 07-03-2010, 06:12 PM   #29
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Default Re: Spark Plug Change for Astra

The original post was a great "how to" on the plug change. I have 24K on my Astra and the plugs that I removed have definite wear on them. I ended up replacing the original Bosch plugs with Autolite Double Platinum's.

...
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Old 07-04-2010, 03:44 PM   #30
vanilla sky
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Default Re: Spark Plug Change for Astra

I was getting about 29MPG before changing plugs, and I'm getting about 32MPG. Both highway fuel economy. Haven't had a tank of pure city, and we probably won't.

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Old 07-04-2010, 04:32 PM   #31
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Default Re: Spark Plug Change for Astra

Quote:
Originally Posted by vanilla sky View Post
I was getting about 29MPG before changing plugs, and I'm getting about 32MPG. Both highway fuel economy. Haven't had a tank of pure city, and we probably won't.
Jealous. Mine never sees above 27-28

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Old 07-05-2010, 12:22 AM   #32
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Default Re: Spark Plug Change for Astra

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Originally Posted by mdcclxxvi View Post
Jealous. Mine never sees above 27-28
We were also travelling between 70 and 80 MPH for a large portion of that. Impressed me greatly.

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Old 07-05-2010, 10:24 PM   #33
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Default Re: Spark Plug Change for Astra

Quote:
Originally Posted by vanilla sky View Post
We were also travelling between 70 and 80 MPH for a large portion of that. Impressed me greatly.
Plus the high RPM and still getting a high MPG is pretty darn good.

...
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Old 09-05-2010, 11:37 AM   #34
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Default Re: Spark Plug Change for Astra

Just changed my spark plugs (40K) after reading the orignal post !

I took my Saturn in for a oil change at 35K and they informed me that the plugs needed to be changed but, not to worry about it. I decided to change them myself after reading the above postings. Thank you for saving me $340.

That was easy !

I replaced my OEM Boshe with Autolite double-Plat, PP5224, 3.99 ea x 4, gapped at .040"
Took me a whole 15mins.

The only thing that gave me a problem was taking off the Valley cover, wasnt quite sure how hard to Push/Pull towards the right. I used a flat head screwdriver and a twist,(left side), to help push it open.

after that all went smooth.

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Old 09-05-2010, 01:25 PM   #35
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Default Re: Spark Plug Change for Astra

Quote:
Originally Posted by NJ-Astra View Post
Just changed my spark plugs (40K) after reading the orignal post !

I took my Saturn in for a oil change at 35K and they informed me that the plugs needed to be changed but, not to worry about it. I decided to change them myself after reading the above postings. Thank you for saving me $340.

That was easy !

I replaced my OEM Boshe with Autolite double-Plat, PP5224, 3.99 ea x 4, gapped at .040"
Took me a whole 15mins.

The only thing that gave me a problem was taking off the Valley cover, wasnt quite sure how hard to Push/Pull towards the right. I used a flat head screwdriver and a twist,(left side), to help push it open.

after that all went smooth.
........Are you my evil twin? LOL Glad it was an easy install for you.

...
-Jon-

3 dr XR, Twilight Blue, 5 speed manual, 18" 5-star rims, Leather trim package, Heated seats, VXMMI (Advanced Audio)

2017 Regal GS, 20", fully loaded

1987 Z28 - modded

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Old 09-05-2010, 10:30 PM   #36
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Default Re: Spark Plug Change for Astra

Is everyone that is using autolites having good luck with them?? I used to love them but it seems quality has gone out the window. I cut grass for a living and I havent had an autolite last me more than a month on a mower. I switched to NGK a couple years ago and never looked back. Havent had a problem since.

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Old 09-06-2010, 11:52 AM   #37
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Default Re: Spark Plug Change for Astra

Quote:
Originally Posted by turboguy327 View Post
Is everyone that is using autolites having good luck with them?? I used to love them but it seems quality has gone out the window. I cut grass for a living and I havent had an autolite last me more than a month on a mower. I switched to NGK a couple years ago and never looked back. Havent had a problem since.
Haven't suggested Autolite for y-e-a-r-s, so I'm not sure how far back "they were any good". I've always used either Bosch or NGK, but have been exclusively NGK for close to ten years now. FWIW, NGK is the largest OEM spark plug manufacturer in the world by far (that includes making plugs for AC Delco, among others), while Autolite is owned by Honeywell.

...
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Old 09-06-2010, 01:05 PM   #38
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Default Re: Spark Plug Change for Astra

Quote:
Originally Posted by Astra La Vista! View Post
Haven't suggested Autolite for y-e-a-r-s, so I'm not sure how far back "they were any good". I've always used either Bosch or NGK, but have been exclusively NGK for close to ten years now. FWIW, NGK is the largest OEM spark plug manufacturer in the world by far (that includes making plugs for AC Delco, among others), while Autolite is owned by Honeywell.
Well my father is almost 70 and he still insists that autolite should be the only plug I use because nothing is better. I tell him they arent good at all but he insists so I tried them. I have always used NGK in my cars and trucks. I still tell my dad i am using autolite and that I must have had a bad batch that summer so we dont argue about it. My dad always used them and I still have some really old ones in the garage from his day.

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Old 09-07-2010, 08:24 AM   #39
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Default Re: Spark Plug Change for Astra

the only car that i ever used autolites in was a 72 pinto and those were oem.

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Old 09-07-2010, 08:41 AM   #40
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Default Re: Spark Plug Change for Astra

Quote:
Originally Posted by unkle bik View Post
Did you have any problems with the plugs seizing in the head upon removal?
i recommend that u remove your spark plugs yearly to check them and also to prevent that from seizing in the head. place a little copper antiseize on the upper half of the threads, away from the near tip.
been following this procedure for years.

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