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  #1  
Old 12-22-2004, 07:41 PM
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Question Beru Ultra-X Spark Plugs

Are there any U.S. dealers for Beru Ultra-X spark plugs? I'm looking for part number UXK 79 and a google search shows nothing but German and Russian sites for the most part. Any ideas?

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  #2  
Old 12-22-2004, 07:57 PM
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What car is it for?
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1992 300CE Schwarz/Schwarz
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  #3  
Old 12-22-2004, 09:16 PM
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They'll be for a 1991 190e 2.3. I looked up the application on Beru's website and came up with that part number. I've found a couple of VW sites selling Beru plugs, but not that part number. Is there another part number I could/should use? The reason that I want these plugs is that the car appears to have a lean misfire at idle and my smog test is comming up next month. Everything else on the ignition and fuel system seems ok, except maybe the old fuel distributor is partially to blame. I'd rather try these plugs first.
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Old 12-22-2004, 11:16 PM
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I just checked with one of my Beru suppliers and in their catalog, they only list the following plugs for your car:

Spark Plugs - Bosch H 8DC
Spark Plugs - Bosch PLATINUM HR 8DPX
Spark Plugs - Bosch+4 RB 4458
Spark Plugs - NGK TR 5

I'm not saying that Beru doesn't make a plug for your car, only that my supplier chose not to carry it. Personally, I like the Bosch H 8DC. If you want something else, here is another consideration:

Silverstone™ S1K Plugs
http://www.nology.com/silver.html
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Old 12-23-2004, 12:09 AM
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Thanks for the info. I currently have the Bosch H8DC0 plugs in it, (about 10k miles on them) but I've heard some really good things about these Beru Ultra-X plugs. They have four ground electrodes, like the Bosch Platinum +4, but have a larger copper based core, so they fire better in earlier CIS injected cars.
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Old 12-23-2004, 08:09 AM
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Bosch makes a +4 Copper as well. I think they are called Super +4's!
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  #7  
Old 12-23-2004, 09:11 AM
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Try

http://www.kingsborne.com/
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  #8  
Old 12-23-2004, 10:54 AM
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Quote:
Originally Posted by irieite
Thanks for the info. I currently have the Bosch H8DC0 plugs in it, (about 10k miles on them) but I've heard some really good things about these Beru Ultra-X plugs. They have four ground electrodes, like the Bosch Platinum +4, but have a larger copper based core, so they fire better in earlier CIS injected cars.
This is marketing BS. Muliple ground electrodes are not necessary, and, in fact, can cause poor performance on many engines. The archives are full of complaints about these plugs. All those metal electodes are "cold" relative to the flame kernel that the spark starts, and all that cold metal can quench an incipient flame causing missfire.

Also, of the four listed plugs, only the Bosch H8DC is a proper NON-RESISTOR plug for a Mercedes engine.

Stick with the H8DC0 (heavy duty electode) or the less expensive H8DC (standard electrode), which work just fine.

Most spark plug problems (idle roughness or emission test problems are common) are caused by using non-OE type plugs with resistors, mulitple electrodes, whatever. The best advice is to install OE equivalent plugs, and when accomplished "spark plug problems" usually go away.

Duke
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  #9  
Old 12-23-2004, 11:31 AM
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I value your opinion Duke BUT I have to say that I am using the Bosch +4 copper plugs and I can honestly say its not a marketing gimmick. Its been on for about 5k miles and they are not fouling, the idle is smoother and the acceleration is better. Note this is not because I switched from old plugs. I actually had new regular DCO plugs in there for 1K and I took them out and put them aside just to give these a try. I was expecting the worse and I'm pleasantly surprised.
Platinums on the other hand my car hates with extreme prejudice
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  #10  
Old 12-23-2004, 11:41 AM
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Smile

Thanks for the link Yal! I noticed on their site, the spark plug link is "under construction", so I guess I'll give them a call.
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  #11  
Old 12-23-2004, 06:42 PM
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I replaced the OE DC0s with "Bosch Platinums" (single electrode) at 15K miles. By 30K miles the idle roughness and emissions problems started. I believe intermittent misfires were causing both.

I switched to Bosch HD9C, and have been using them ever since. I inspect then at 15K and replace at 30K. The idle is not perfect and emissions are still high, but all is better than with the Bosch Platinums.

Nothwithstanding anecdotal evidence, based on my knowledge of ignition and combustion in spark ignition engines, I will not use multiple ground electrode spark plugs.

The archives are full of problems from other than the OE type non-resistor spark plugs. In most cases, installing the correct standard or HD electrode non-resistor plugs solved the problem, but some say that they still had trouble with the HD electrode type plug that went away when replaced with the standard electrode version.

Duke
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  #12  
Old 12-23-2004, 07:19 PM
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I have posted this before, but will do so one more time.
My car ( see sign. below ) came with Bosch F-7 KTCR plugs.
These are triple electrode, resistor plugs.
I change them every 30 k miles ( manual suggests to go twice as far ).
What the heck, there is only 4 to change anyway.
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  #13  
Old 12-23-2004, 09:26 PM
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I would NEVER use the BOSCH Platinum +4 spark plugs in a CIS car. These Beru Ultra-X plugs feature four ground electrodes, but not the tiny primary electrode like the +4's.
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  #14  
Old 12-23-2004, 10:00 PM
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Quote:
Originally Posted by manny
I have posted this before, but will do so one more time.
My car ( see sign. below ) came with Bosch F-7 KTCR plugs.
These are triple electrode, resistor plugs.
I change them every 30 k miles ( manual suggests to go twice as far ).
What the heck, there is only 4 to change anyway.
Your car has a different ignition system than M102/103 engines. If the OEM installs multielectode/resistor type plugs, then the ignition system was designed for them. As a rule, later cars have more powerful igntion systems with more per spark energy. This is especailly true for "direct" systems that have a coil for each spark plug.

The best and safest bet in the vast majority of cases is to use the OE or an OE equivalent plug.

It doesn't take too long in the archives to realize that this is very true for the M102/103 vintage cars, and if you use something other than the non-resistor OE type plug, for which Bosch is the only readily available choice, there's a good change you will have some ignition related problems, although the average owner may not recognize igntion related problems. It's only after we harange them to install the OE type non-resistor Bosch plugs that the problems miraculously goes away.

Duke
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  #15  
Old 12-23-2004, 10:12 PM
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I did replace my OE coil with an MSD Blaster coil, which has a higher voltage output and performs better at high RPM's than the OE coil.

The Beru UXK 79 plugs are non-resistor plugs. I think I'll be *OK*.. We'll see.

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