Beru Plug Replacement 4 Defunct Bosch H9DCO - My Story - Page 3 - PeachParts Mercedes-Benz Forum

Duke2.6 · #31 09-30-2006, 11:23 PM

Quote:

Originally Posted by Duke2.6

That's a 3/4" reach gasketed plug with a 13/16" hex. The M103 requires a .708" reach taper seat plug with a 5/8" hex.

The NGK TR5 is a resistor plug equivalent to the HR9DC. NGK does not offer a non-resistor verision equivalent to the H9DC.

If one wants to stock up on H9DC or H9DC0, try dealers, but their prices are probably higher than the aftermarket - back when the aftermarket actually had them.

I found one set of H9DCs on the web and bought one at a dealer. I also have two 15K mile used sets that I ran through a spark plug cleaner that are serviceable for at least another 15K miles. At the rate I'm accumulating mileage I should be good for the duration...

Duke

My apologies. I must have misread my catalog.

BP5EFS is a correct replacement for the Bosch H9DC - non-resistor, correct geometry, equivalent heat range.

Duke

Arthur Dalton · #32 09-30-2006, 11:36 PM

Quote:

Originally Posted by Duke2.6

My apologies. I must have misread my catalog.

BP5EFS is a correct replacement for the Bosch H9DC - non-resistor, correct geometry, equivalent heat range.

Duke

Correct ...........

Secret Squirrel · #33 10-01-2006, 01:27 AM

Is the NGK BP5EFS a regularly stocked plug at any US distributor?

Mike Murrell · #34 10-02-2006, 10:46 AM

Quote:

Originally Posted by Secret Squirrel

Is the NGK BP5EFS a regularly stocked plug at any US distributor?

All NGK plugs are available at most of the mass marketer auto parts stores. Good independents will carry them as well.

I've never had trouble finding NGK plugs.

This is a better alternative to the 3 month wait for Beru non-resistors that I just went thru.

Secret Squirrel · #35 10-02-2006, 01:36 PM

I just noticed on the Australian NGK plug finder:

http://www.ngkspark.com.au/part_index.htm?http://www.ngkspark.com.au/PartFinder/spark_plug_vehicle_type.htm

It lists BP6EFS as the plug for the 300 SEL, SE etc, and the BP5EFS matches up with the 300 CE...

david s poole · #36 10-02-2006, 02:08 PM

i just ordered plugs for a 1990 2.6 from local dealer and i got bosch h9dco.no resistor so apparently the dealers can get correct plugs.

yal · #37 10-02-2006, 02:12 PM

Quote:

Originally Posted by Secret Squirrel

I just noticed on the Australian NGK plug finder:

http://www.ngkspark.com.au/part_index.htm?http://www.ngkspark.com.au/PartFinder/spark_plug_vehicle_type.htm

It lists BP6EFS as the plug for the 300 SEL, SE etc, and the BP5EFS matches up with the 300 CE...

Be careful of non USA sites. The cars use cooler plugs in those markets.

So for example a 300E in the USA uses H9dc/o while in Europe it uses H8dc/o
The M102 uses H8dc/o in the USA but an h7dc/o in Europe/ Australia etc.

petaling · #38 10-02-2006, 08:58 PM

Quote:

Originally Posted by david s poole

i just ordered plugs for a 1990 2.6 from local dealer and i got bosch h9dco.no resistor so apparently the dealers can get correct plugs.

I just went to the MB dealer today they offered to sell me HR9DC for 4.50 C$each.I declined and told the partsguy it is a resistor plug.He says that what MB's computer tell them to use..
I went to Partsource,offshoot of CanadianTire parts store,the kid at the service desk punch it BP5EFS,no they dont have it and cant order it either(they have a 20% discount on NGK plugs this week).He offered to sell me these iridium resistor plugs,plat resistor plug.
I will talk to my mechanic this week and see whether this plug is stocked in North America.
If they stock it,I find it very strange NGK's US partfinder site list TR5 as the correct plug(regular) and no mention of BP5EFS on the US NGK site.

petaling · #39 10-03-2006, 09:17 PM

i went to my mechanic today and also visited CanTire parts store.BP5EFS is not listed as available from the NGK Canadian catalogue.Crossover to H9DCO is listed as TR5, the same listed on the NGK US website.

It seems this plug is not ordinarily available.

I wrote to followup with Autohauz and got the following response:Can someone confirm whether this is non-resistor or RESISTOR plug before I go ahead and order.
Response from Autohauz:
We can get BP5EFS (sold under our part number FOR004770) but I think
this is now a resistor plug as well. We do not stock it and it would
ship directly from one of our importers, so I can't physically
inspect it, however they have notes with this part number stating
"V-Power Resistor".
I spoke to our purchasing manager about this issue and he said that
Bosch is currently not producing any plugs without resistors. He
also said that one of our importers indicated that NGK and Champion
are following the same philosophy and discontinuing non-resistor
plugs. I have had many customers state that they have heard that
this is a problem with many models, however I have had very few
customers actually use the new resistor style plugs and report
problems. Unfortunately, if these plugs do actually cause problems,
we do not have any options to still obtain the original non-resistor
types.

Best Regards,
Tom
******** AZ Winners Circle
Winners@*************** - http://www.***************

jhodg5ck · #40 10-03-2006, 11:48 PM

One more reason my Beru connection finally came through.. First rate plugs that don't muck up the ignition system.

Jonathan

cf · #41 10-04-2006, 09:28 AM

"E" only is 3/4" reach.

This is per NGk's `Desin symbol chart'.

Quote:

Originally Posted by Duke2.6

That's a 3/4" reach gasketed plug with a 13/16" hex. The M103 requires a .708" reach taper seat plug with a 5/8" hex.

The NGK TR5 is a resistor plug equivalent to the HR9DC. NGK does not offer a non-resistor verision equivalent to the H9DC.

If one wants to stock up on H9DC or H9DC0, try dealers, but their prices are probably higher than the aftermarket - back when the aftermarket actually had them.

I found one set of H9DCs on the web and bought one at a dealer. I also have two 15K mile used sets that I ran through a spark plug cleaner that are serviceable for at least another 15K miles. At the rate I'm accumulating mileage I should be good for the duration...

Duke

anthonyb · #42 01-07-2007, 02:26 PM

Quote:

Originally Posted by Duke2.6

My apologies. I must have misread my catalog.

BP5EFS is a correct replacement for the Bosch H9DC - non-resistor, correct geometry, equivalent heat range.

Duke

What about the NGK BCP5ES? I can't seem to find the BP5EFS anywhere, but my local parts store thinks they can find some of the other NGK plug. Will these work?

None of the spark plug cross references I've been able to find so far list a direct, easily available non-resistor option for the H9DC...

petaling · #43 01-07-2007, 02:35 PM

they are only available outside North America.
In NA,i ve resigned to the fact the resistor NGK plugs # TR5 may be used as an alternative.

JasonOne · #44 01-07-2007, 07:51 PM

I started looking around for H9DC plugs.

www.********.com has them I think.

And here are two places that seem to have them listed online.

http://www.internationalfilters.com/products/sprkplugs.html
International Filters
3451 Galazy Place, Oxnard CA 93030
800. 872. 2333
Internet sales Jim Mars and Ken Anderson
srammij@internationalfilters.com
kenander@internationalfilters.com

http://market.autopartsfair.com/mercedes-engine_parts/catalog-item-248001.html
this is a link at Auto Parts Fair to a catalog number F10000-37610/BOS
Its for the 1988-89 300 CE motor:103.983
And it's the Bosch H 9 DC plug

Let's see if these help. There were other leads out there. I'll look for some good ones in the event these dont turn up the right non-resistors.

Regards,
Jason

petaling · #45 01-07-2007, 09:26 PM

please report here if and when you DO receive an actual non-resistor plug.
On the bosch catalog,it is still listed in 2006.But when the parts dept of a major chain store here actually phoned Bosch direct ,they say it's not available any more.Ditto Dealership.
Prev MB owners has ordered from various places for the listed H9DC BUT later only to receive HR9DC.
Thanks