Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 06-09-2004, 04:35 PM
lino's Avatar
Registered
 
Join Date: Jun 2004
Location: Canada
Posts: 981
Question Which Spark Plugs and Air Filter

I was wondering what would be the best spark plug and air filter for my 1989 300ce?

Last edited by lino; 06-09-2004 at 05:00 PM.
Reply With Quote
  #2  
Old 06-09-2004, 07:21 PM
Likes DIY/Tech'y inclined
 
Join Date: Sep 2002
Location: San Francisco Bay Area
Posts: 452
OEM

OE for plugs and most probably for air filter too... The thing to remember here is that most plugs have built in resistance and our MBZs do not require that type since the wire jacket/sleeve provides 1kohm...

cheers,
__________________
sjsfiji

'87 W124 260E (DD)
98K orig. mi. @7/15
CLK 7-Spoke Forged Wheels
Neuspeed springs/Bilstein Sport
4/3 bump (F/R)

'97 993 Carrera
106K orig. mi.
Always driven like it's stolen
Reply With Quote
  #3  
Old 06-09-2004, 10:56 PM
lino's Avatar
Registered
 
Join Date: Jun 2004
Location: Canada
Posts: 981
Would you recommend copper or platinum?
Reply With Quote
  #4  
Old 06-09-2004, 11:52 PM
Cigar Havana's Avatar
Registered User
 
Join Date: Jan 2003
Location: London Ontario Canada
Posts: 382
Only copper

The car was engineered for copper, so I recommend you use copper plugs.
__________________
1989 420 SEL
Reply With Quote
  #5  
Old 06-10-2004, 12:03 AM
Registered User
 
Join Date: Sep 2003
Location: Miami, FL
Posts: 181
Copper

Use copper for sure, I have had some weird stories about plats do a search, there is a wealth of info on this topic.
__________________
**A few Hondas etc... etc... Not Worth Mentioning**
83 Euro W126 380 sel Money Pit (Sold)
91 W124 300e 2.6. (Sold) 3.0 Motor is Much better!!
93 BMW E34 Touring Wagon (Sold) Sweet Car!!
91 300e (Just 200k with Ease.)Best car ever ???(Sold)
90 420sel (Black with Tan Interior) Best car ever!!!!!!!
Reply With Quote
  #6  
Old 06-10-2004, 12:07 AM
lino's Avatar
Registered
 
Join Date: Jun 2004
Location: Canada
Posts: 981
Is the correct Bosch Part # H 9DC0 ?

I see 2 different part numbers.

1. H 9DC - I think this one is Bosch Super
2. H9DC0- I think this one is the OEM

Can someone please verify this?

Also, my cost on the H9DC0 is $25 Canadian or $19 US including taxes for all 6.

Is that price fair?
Reply With Quote
  #7  
Old 06-10-2004, 01:58 AM
Nautilus's Avatar
Registered User
 
Join Date: May 2004
Location: Bucharest, Romania
Posts: 140
Quote:
Originally posted by lino
Is the correct Bosch Part # H 9DC0 ?

I see 2 different part numbers.

1. H 9DC - I think this one is Bosch Super
2. H9DC0- I think this one is the OEM

Can someone please verify this?

Also, my cost on the H9DC0 is $25 Canadian or $19 US including taxes for all 6.

Is that price fair?
1. On the plate in the engine bay are specified H8DC (slightly hotter)

2. The price is fair - I paid about $20 w/ taxes for a set of 6.

~Nautilus
__________________
1990 260E Sportline (that's 300E 2.6 for our American friends) -> sold
2001 E320 4Matic Elegance -> my Dad's daily drive
2005 Seat Leon FR 1.8T
Reply With Quote
  #8  
Old 06-10-2004, 01:46 PM
Likes DIY/Tech'y inclined
 
Join Date: Sep 2002
Location: San Francisco Bay Area
Posts: 452
plugs

I'd stick with Cu and use the one w/o the "0". That's what I use which is perfect up to 100mi/hr as per CD. The "0" just means a larger electrode diameter.

It appears you should be using H9DC. I'm looking at the chart and H8DC should be used for "Basic and national version except AUS, J, and USA. H9DC is spec'd for Low Compression for those areas, but are for normal for ours.

cheers,
__________________
sjsfiji

'87 W124 260E (DD)
98K orig. mi. @7/15
CLK 7-Spoke Forged Wheels
Neuspeed springs/Bilstein Sport
4/3 bump (F/R)

'97 993 Carrera
106K orig. mi.
Always driven like it's stolen
Reply With Quote
  #9  
Old 06-10-2004, 03:25 PM
lino's Avatar
Registered
 
Join Date: Jun 2004
Location: Canada
Posts: 981
sjsfiji

I'm definitely going to get the copper. I'm wondering why you don't use the H9DC0?
__________________
1989 300CE Astralsilber/Schwarz
1992 300CE Schwarz/Schwarz
Reply With Quote
  #10  
Old 06-10-2004, 04:00 PM
Registered User
 
Join Date: Mar 2003
Location: Southern California
Posts: 2,066
Quote:
Originally posted by Nautilus
1. On the plate in the engine bay are specified H8DC (slightly hotter)

2. The price is fair - I paid about $20 w/ taxes for a set of 6.
In the Bosch heat range system the higher the number the hotter the plug, so 9 is hotter than 8.

The "0" suffix has a larger electrodes. Theoetically they should have longer life, but the standard electrode version has no problem lasting 30K miles. Given the additional price of the "0" suffix plug, I don't think they are worth the additional cost.

Also, I believe that the larger electrodes contribute to idle misfire, which can cause emission problems and is the likely source of the slight idle roughness that is typical of 103 engines. Since the electodes are relatively cold compared to incipient flame front temperature, they will have more tendency to quench the incipient flame and cause a misfire.

Duke
Reply With Quote
  #11  
Old 06-10-2004, 07:20 PM
lino's Avatar
Registered
 
Join Date: Jun 2004
Location: Canada
Posts: 981
Quote:
Originally posted by Duke2.6
In the Bosch heat range system the higher the number the hotter the plug, so 9 is hotter than 8.

The "0" suffix has a larger electrodes. Theoetically they should have longer life, but the standard electrode version has no problem lasting 30K miles. Given the additional price of the "0" suffix plug, I don't think they are worth the additional cost.

Also, I believe that the larger electrodes contribute to idle misfire, which can cause emission problems and is the likely source of the slight idle roughness that is typical of 103 engines. Since the electodes are relatively cold compared to incipient flame front temperature, they will have more tendency to quench the incipient flame and cause a misfire.

Duke
So are you saying that the "0" version may cause slight idle roughness?
__________________
1989 300CE Astralsilber/Schwarz
1992 300CE Schwarz/Schwarz
Reply With Quote
  #12  
Old 06-10-2004, 08:18 PM
Registered User
 
Join Date: Mar 2003
Location: Southern California
Posts: 2,066
It's a hunch based on my graduate training, including combustion theory, at the University of Wisconsin Engine Research Center, but I have no way to prove it.

I use the H9DC.

Duke
Reply With Quote
  #13  
Old 06-11-2004, 01:18 AM
lino's Avatar
Registered
 
Join Date: Jun 2004
Location: Canada
Posts: 981
Sorry for asking so many questions, but I understand that you are content using the H9DC, but have you ever tried the "0" version before?
__________________
1989 300CE Astralsilber/Schwarz
1992 300CE Schwarz/Schwarz
Reply With Quote
  #14  
Old 06-11-2004, 02:09 AM
Registered User
 
Join Date: Mar 2003
Location: Southern California
Posts: 2,066
The "0" version was OE, and I bought my car new.

You're beating this to death. Just flip a coin - heads H9DC0, tails H9DC.

Or buy a set of each an run your own experiments.

Duke
Reply With Quote
  #15  
Old 06-12-2004, 11:03 PM
lino's Avatar
Registered
 
Join Date: Jun 2004
Location: Canada
Posts: 981
I bought the H9DC and will change the plugs in the next couple of days. My supplier told me that they sell the H9DC all the time and they only had 5 H9DC0 plugs in stock and also mentioned that the last time they sold the H9DC0 was 2 years ago.
__________________
1989 300CE Astralsilber/Schwarz
1992 300CE Schwarz/Schwarz
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 12:22 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page