Beru Ultra-X Spark Plugs

[irieite]

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?

[lino]

What car is it for?

[irieite]

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.

[lino]

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

[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.

[mctwin2kman]

Bosch makes a +4 Copper as well. I think they are called Super +4's!

[yal]

Try

http://www.kingsborne.com/

[Duke2.6]

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

[yal]

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

[irieite]

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.