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DougG 
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 Topic: Aluminum head spark plug change
Posted: 21 Aug 2019 at 7:09am |
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Is it better to change spark plugs in a car with aluminum heads warm? Or would cold be better?
Edited by DougG - 21 Aug 2019 at 7:19am
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chaskaduo
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Posted: 21 Aug 2019 at 7:59am |
Recommended cool here, and more info.
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1938 B, 79 Dynamark 11/36 6spd, 95 Weed-Eater 16hp, 2010 Bolens 14hp
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Dusty MI
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Joined: 13 Sep 2009
Location: Charlotte, Mi
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Posted: 21 Aug 2019 at 8:13am |
What happened to Champion Plugs? At one time they were good plugs, but they went down hill fast, somewhere around 1970.
Dusty
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917 H, '48 G, '65 D-10 series III "Allis Express"
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Alberta Phil
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Posted: 21 Aug 2019 at 10:23am |
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Probably when they moved production off shore to China!
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Tbone95
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Posted: 21 Aug 2019 at 10:28am |
Little trick I learned, the hard way: I ended up cross threading a plug in an aluminum head. I was able to repair the hole without too much trouble because I didn't force it too far. Anyway....From that day forward, I always start threading a plug by putting it in an old spark plug wire boot that I've cut off the wire. It holds it tight enough to start threading, but will slip if it isn't threading in correctly. Even helps you holding it for easier starting.
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jaybmiller
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Joined: 12 Sep 2009
Location: Greensville,Ont
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Posted: 21 Aug 2019 at 10:49am |
I had my local mechanic do my truck after reading HORROR stories about changing them, let alone you have to be an Olympic gymnast to do it ! I figured if HE screwed up, he'll fix PDQ as HIS hoist is MIA until my truck runs again ! As it was ,all 8 came out fine AND he fixed the exhaust bolts at the same time.
Odds are real good I'll be dead and buried before truck needs another set done....
Jay
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Ray54
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Joined: 22 Nov 2009
Location: Paso Robles, Ca
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Posted: 21 Aug 2019 at 11:23am |
 As much as we like to say the old stuff is so much better...................some things well they ant so bad. This little Mazda (yes Mr Shameless a FORD) pickup the FIL gave my son who sent it my way.  At 100,000 it need a new transmission. It was a nice puting around truck getting 20+ mpg.  Had a miss, but not being a real Mr fix it like O'l Joe. An being real cheap,I said bet this thing has not new plugs in forever. Dang if I didn't guess that one right. There was no electrod left, it was burned off at 120,000. But dang it  still had miss, a fuel injector had gone bad. But the worn out about twice plugs still made a spark. But how many sets of plugs to make that 60's Chevy get to 120,000 miles.  Sorry back to the real program.
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LeonR2013
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Posted: 21 Aug 2019 at 5:16pm |
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Also when you change the plugs on an alum. head it might be a good idea to put a recommended anti-seize on the plug. Leon
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DiyDave
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Posted: 21 Aug 2019 at 5:48pm |
 Tbone95 wrote:
Little trick I learned, the hard way: I ended up cross threading a plug in an aluminum head. I was able to repair the hole without too much trouble because I didn't force it too far. Anyway....From that day forward, I always start threading a plug by putting it in an old spark plug wire boot that I've cut off the wire. It holds it tight enough to start threading, but will slip if it isn't threading in correctly. Even helps you holding it for easier starting. |
A length of vacuum hose, the size to fit over the wire contact of the SP is real handy, too. Specially for those real hard to reach plugs, you can use a longer piece of hose, spin plug with right hand and guide plug into hole, with left, or vice versa, if you is a lefty...
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fixer1958
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Posted: 21 Aug 2019 at 6:47pm |
[QUOTE=Dusty MI]What happened to Champion Plugs? At one time they were good plugs, but they went down hill fast, somewhere around 1970.
Dodge Ram uses them in there trucks. I always replace what it took from the manufacturer. Get them from the dealer and says Mopar on them. Champion from the parts store. 30K plug change interval. 16 plugs on a Hemi. I never have a problem with them.
Doesn't make any difference to me hot or cold for a plug change unless you are cooking some hide off.
Edited by fixer1958 - 21 Aug 2019 at 6:49pm
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DougG
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Posted: 21 Aug 2019 at 7:00pm |
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Only reason I ask this is on my Stratus one was terrible to get out,, started it up let it run a bit , got some heat in it and it back out smoothly,,
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Dave H
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Posted: 22 Aug 2019 at 7:38am |
Dang fixer, my Ford will go over three times that on plug change. 
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fixer1958
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Posted: 22 Aug 2019 at 3:03pm |
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That's recommended for those engines. I think they are copper core plugs.
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