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From Thu Jul 31 21:05:52 1997
From: Dale Beuning <>
Subject: bosch platinums (re)
Date: Thu, 31 Jul 1997 21:05:45 +1700 (PDT)
Cc: ()

Bosch Silber (silver) plugs are most likely the correct plugs for your car. Almost every BMW for the last 20 years has been speced with silver plugs. You car will run better with them, honest. They cost around $3.50 from mailorder, and $5-$7 at the dealer. So I'd just order a set from Steve at the ultimate garage and change them when they came in. You should get 30k-50k from a set.

see my parts page for steves address/email


> From digest.v7.n29 Thu Jul 31 17:15:55 1997
> From:
> Date: Thu, 31 Jul 1997 08:36:07 -0500
> Subject: bosch platinums
> Are Bosch Platinum plugs really the ones for my car? I am not too sure. I
> daily drive a 1981 528i with 168k miles, and I put on about 150-250 miles a
> week, mostly around town driving 45-55 mph.
> Shortly after purchasing the car I ordered some tune-up stuff, and was told
> by a mail-order bmw place that "these are the plugs for your car". When I
> pulled the old ones out (which happened to be platinums) I could hardly
> believe my eyes. They were totally covered with a white/tan chalky coating,
> and about three had severe carbon build-up. They cleaned up fine using my
> trusty little JC Whitney sand-blaster (left over from my VW beetle & bus days)
> so I regapped them and put them back in the car.
> The car ran awesome for about 2k miles, then I started noticing a drop in
> performance and some minor rough running. Before I had a chance to look into
> my problem I took a long trip, and put about 1000 miles on the car driving
> at an average of 70-75 mph (sorry, but the car just really enjoys going that
> pace, or more. My kids kept saying, "Dad, peg the speedometer again!!!....").
> Well, after all these road miles, I got around to pulling the plugs, and, gasp,
> they all were severely carbon fouled. And plug in cylinder #6 was almost
> fouled shut. I am beginning to seriously wonder if these plugs are the
> correct heat range for this engine, or if I these problems are just due to
> the age of the powerplant. I usually run 89-93 octane, and the overall
> performance of the car is great.
> I put in some new Bosch Platinums last night, and now the car has restored
> power and pep. Am I going to have to replace my plugs with every oil change?
> I have never had to do this with any other car, and I think I should be able
> to get more than 3000 miles on a set of plugs....
> Suggestions from the audience?
> Steve Block
> 1981 528i
> email
> ps. Al Sutlick - I am still planning on coming out to San Diego this fall....


                       |            Dale Beuning           |
                       |       email:     |
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