Are Bosch Super Copper plugs OK?

[benhogan]

are they ok to use on the e320 or should i hold out for the NGK?

local parts store is out of the NGK

[lee polowczuk]

you should be fine with any copper plug.....although non-resistors are now impossible to find..

i think i might even be running champion in my 1995 e320.... doesn't seem to matter one way or the other.

[benhogan]

This Motorweek Goss's Garage guy runs the motor quickly before removing the plugs. He says this is because the head is aluminum and the carbon might get jammed in the threads??

Do you guys do this?

Wow, this is all news to me! I guess I have been living in Diesel World way too long!

Goss' Garage: Spark Plug Removal - YouTube

[tbomachines]

Originally Posted by benhogan

This Motorweek Goss's Garage guy runs the motor quickly before removing the plugs. He says this is because the head is aluminum and the carbon might get jammed in the threads??

Do you guys do this?

Wow, this is all news to me! I guess I have been living in Diesel World way too long!

Goss' Garage: Spark Plug Removal - YouTube

I've done it. I've also done it when replacing the GPs and reaming the holes on my diesel, knocks all the carbon right out.

[benhogan]

Originally Posted by tbomachines

I've done it. I've also done it when replacing the GPs and reaming the holes on my diesel, knocks all the carbon right out.

sweet! thanks TBO!

[Air&Road]

I'm not speaking of glow plugs here, I'm speaking of spark plugs.

I would NOT run an aluminum head engine just before removing the plugs. The main concern in an aluminum head engine is to NOT pull the threads. MB's are not so bad about this, but there are other engines that are worse.

You are much better served to remove the plugs with the engine DEAD COLD! This will virtually eliminate the chance of stripping threads.

Now for the controversial part; use a VERY LIGHT coat of copper based anti-sieze on the THREADS ONLY before screwing the new plugs in place. Take great care to ensure that the anti sieze does not get any farther than the threads so that it is not exposed to the combustion chamber.

To the original question, copper core plugs are preferable for these engines. Don't use platinums. They have a tiny center electrode due to the cost of the material. The tiny electrode makes for a thin spark which will not promote good idle characteristics.

Hope this helps.

[JamesDean]

I've been using NGK's stuff. BP5EFS or BP5ES I think depending on which car.. m103/m116

[benhogan]

Originally Posted by Air&Road

I'm not speaking of glow plugs here, I'm speaking of spark plugs.

I would NOT run an aluminum head engine just before removing the plugs. The main concern in an aluminum head engine is to NOT pull the threads. MB's are not so bad about this, but there are other engines that are worse.

You are much better served to remove the plugs with the engine DEAD COLD! This will virtually eliminate the chance of stripping threads.

Now for the controversial part; use a VERY LIGHT coat of copper based anti-sieze on the THREADS ONLY before screwing the new plugs in place. Take great care to ensure that the anti sieze does not get any farther than the threads so that it is not exposed to the combustion chamber.

To the original question, copper core plugs are preferable for these engines. Don't use platinums. They have a tiny center electrode due to the cost of the material. The tiny electrode makes for a thin spark which will not promote good idle characteristics.

Hope this helps.

doing the plugs on a stone cold engine is what i learned to do years ago as well. i was slightly surprised to see this 'new' procedure.

[rayhennig]

Originally Posted by lee polowczuk

.....although non-resistors are now impossible to find..

Non-resistor plugs are essential on these cars. Bosch, Beru, NGK, Champion. I've got Beru and all seems fine.

Some say that Bosch ones are difficult to find; maybe that's why I've got Beru. Others say that Bosch quality is not what it was. Who knows?

Anyway, non-resistor it is.

RayH

[tbomachines]

Originally Posted by rayhennig

Non-resistor plugs are essential on these cars. Bosch, Beru, NGK, Champion. I've got Beru and all seems fine.

Some say that Bosch ones are difficult to find; maybe that's why I've got Beru. Others say that Bosch quality is not what it was. Who knows?

Anyway, non-resistor it is.

RayH

Depends on the wirs

[rayhennig]

Originally Posted by tbomachines

Depends on the wirs

Standard MB.

RayH

[oldsinner111]

right now I'm running a plug like my stocks bosch with 3 ground straps.They are Denso K20pbr-s10 strongest plug yet,all copper for my nitrous