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  #1  
Old 08-27-2007, 12:25 PM
meltedpanda's Avatar
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Lost in a Sea of Spark Plug suggestions -72 450SL

OK so I searched all the threads here and I may be a bit more confused. I am trying to track down this miss and some have pointed to my plugs so I got to thinking - (not good)
Sooo, I looked through the posts, I find gap range from .032 - .035
and plugs recomendations for a W9dc0- Bosh, 7911 Bosh or Ngk BP6ES.
But also there is referece to 450's VS 560's , early 70's versus 80's

All I want to know is what do I put in my 72 450SL .

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2015 Porsche Cayman - Elizabeth
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Sadly MERCEDESLESS - ALways LOOKING !
99 E320 THE Queen Mary - SOLD
62 220b - Dolly - Finally my Finny! Sadly SOLD
72 450SL, Pearl-SOLD
16 F350 6.7 Diesel -THOR
19 BMW X5 - Heaven on Wheels
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  #2  
Old 08-27-2007, 04:07 PM
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NGK BP6ES...they work well, last long and have a broad heat range, use Nevr-Seez on the threads...end of story...

230/8

p.s.: don't be surprised if your miss stays with you at low idle speeds. It is not uncommon and usually associated with minor wear on the points or uneven fuel injector flow patterns.
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  #3  
Old 08-27-2007, 04:18 PM
meltedpanda's Avatar
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Gotcha, thanks
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Ron
2015 Porsche Cayman - Elizabeth
2011 Porsche Cayman - Bond,James Bond
Sadly MERCEDESLESS - ALways LOOKING !
99 E320 THE Queen Mary - SOLD
62 220b - Dolly - Finally my Finny! Sadly SOLD
72 450SL, Pearl-SOLD
16 F350 6.7 Diesel -THOR
19 BMW X5 - Heaven on Wheels
14 38HP John Deere 3038E Tractor -Mean Green
84 300SD, Benjamin -SOLD
71 220 - W115-Libby ( my first love) -SOLD
73 280 - W114 "Organspende" Rest in Peace
81 380 SL - Rest in Peace
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  #4  
Old 08-30-2007, 11:31 AM
nobby's Avatar
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Quote:
Originally Posted by meltedpanda View Post
OK so I searched all the threads here and I may be a bit more confused. I am trying to track down this miss and some have pointed to my plugs so I got to thinking - (not good)
Sooo, I looked through the posts, I find gap range from .032 - .035
and plugs recomendations for a W9dc0- Bosh, 7911 Bosh or Ngk BP6ES.
But also there is referece to 450's VS 560's , early 70's versus 80's

All I want to know is what do I put in my 72 450SL .
Do you have your owners manual? The correct spark plug recommendations are there. Bosch stamps the gap on the box the plug comes in.
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  #5  
Old 08-30-2007, 12:04 PM
meltedpanda's Avatar
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Location: Central Ky
Posts: 6,265
I do , it lists BOSCH - W175T30 or Champion UN1ZY, , which you see leads to more confusion
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Ron
2015 Porsche Cayman - Elizabeth
2011 Porsche Cayman - Bond,James Bond
Sadly MERCEDESLESS - ALways LOOKING !
99 E320 THE Queen Mary - SOLD
62 220b - Dolly - Finally my Finny! Sadly SOLD
72 450SL, Pearl-SOLD
16 F350 6.7 Diesel -THOR
19 BMW X5 - Heaven on Wheels
14 38HP John Deere 3038E Tractor -Mean Green
84 300SD, Benjamin -SOLD
71 220 - W115-Libby ( my first love) -SOLD
73 280 - W114 "Organspende" Rest in Peace
81 380 SL - Rest in Peace
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  #6  
Old 08-30-2007, 03:04 PM
hill's Avatar
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Location: Northern Calif Sacramento
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Quote:
Originally Posted by meltedpanda View Post
OK so I searched all the threads here and I may be a bit more confused. I am trying to track down this miss and some have pointed to my plugs so I got to thinking - (not good)
Sooo, I looked through the posts, I find gap range from .032 - .035
and plugs recomendations for a W9dc0- Bosh, 7911 Bosh or Ngk BP6ES.
But also there is referece to 450's VS 560's , early 70's versus 80's

All I want to know is what do I put in my 72 450SL .
This was from a previous reply.

The plugs I have on the shelf are Super Bosch WR9DC. Bosch has changed there numbering system since 2004 so the new number is WR90dc. The Kragen/Checker internal number is 7512 if they look it up by make and model the will come up with nothing. So 7512 is the magic number. The R in the name of the plug means it is a resistor plug but it takes 20,000 less volts to properly fire a solid copper core VS a platinum plug. Price is now $3.59 a piece, sure am glad I bought 3 boxes of 10 at 1$ back then.[/QUOTE]

The two plugs that you can run are a NGK BP6ES or BOSCH WR90DC. Never a problem in my 107 and she is a oil addict. I set my plugs at 032 and let physics take it to 035.

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