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#1
08-14-2008, 10:41 PM
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spark plug question
ok im about to change the plugs in my 300sl , i have bosch platinum fusion 4 in there now .. i read that i should use copper plugs is this right ? and are the bosch platinum no good 4 this car ?
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#2
08-14-2008, 11:15 PM
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I read this years ago when I was thinking about putting them in my 300E. I would stick with a bosch set. And after searching for a second, I found the article:
http://www.peachparts.com/shopforum/showthread.php?t=1298
__________________
2002 Mitsubishi Galant ES: Daily driver 1987 300E: Still runs, but thinking about doing an overhaul. Former name, Chris17H. Can't remember my password for anything (4-6 years since I have been back on this great site).
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#3
08-14-2008, 11:56 PM
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so the bosch platinum 4 would be fine ?
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#4
08-15-2008, 05:57 AM
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spark plugs
In my opinion, for any type of plug, removal and replacement with a new thin coat of anti-seize compound should be done once a year regardless of mileage. The reason is to eliminate the probability of the plugs "freezing" in the aluminum heads if left too long. The resulting agony is excruciating. Platinum plugs are sold on the basis of lifetime thus discouraging the buyer from removing them periodically.
If you take my advice to remove the plugs from time to time, you may as well clean and set them and also inspect them for quality of combustion. I would (and do) use the copper plugs for that reason.
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#5
08-15-2008, 01:14 PM
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Bosch plug threads are nickel coated to alleviate need for antiseize.
Bosch recommends against antiseize. Mercedes recommends against antiseize. You will NEVER get an accurate torque reading on a plug (or anything else) coated with antiseize and you risk overtightening and stripping threads. Bosch Platinum plugs are K-mart items. If you check various Bosch websites around the world you'll note these are only sold in the USA--it's the place where folks "believe" in things like "filterchargers," cat-back exhausts, Slick 50, etc. Easy pickins, that is.
__________________
Kent Christensen Albuquerque '07 GL320CDI, '10 CL550. '01 Porsche Boxster Two BMW motorcycles
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#6
08-18-2008, 07:30 PM
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Read this thread
Danger: RESISTOR SPARK PLUGS
http://www.peachparts.com/shopforum/showthread.php?t=197392
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