M111.960 Spark Plug gap advice

[JC220]

Hi all,


The time has came to fit new spark plugs to my project 1994 220CE 124 coupe. I have stuck with the tried and tested Bosch F8DC4 plugs on this engine and I am wondering if I should follow advice on other M104 + M119 engines that run that same plug – gapping up to 1mm VS 0.8mm factory spec?


Opinions please




I know you mericans aren’t familiar with such high CC motors - it’s an m111.960 in this beast But it does have a fresh GVZ approved Oil filler cap so it's OK

 

[jhodg5ck]

Hi all,


The time has came to fit new spark plugs to my project 1994 220CE 124 coupe. I have stuck with the tried and tested Bosch F8DC4 plugs on this engine and I am wondering if I should follow advice on other M104 + M119 engines that run that same plug – gapping up to 1mm VS 0.8mm factory spec?


Opinions please

View attachment 85330 View attachment 85331


I know you mericans aren’t familiar with such high CC motors - it’s an m111.960 in this beast But it does have a fresh GVZ approved Oil filler cap so it's OK

I use 1mm. Just helps make for a nice idle.

Jono



Sent from my SM-G960U using Tapatalk

 

[gerryvz]

1 to 1.1mm is perfect for the F8DC4.

 

[JC220]

Gents, thankyou for that I can confirm the plugs are now gapped to 1mm and torqued into place

 

[Oldcar]

Run car and plug gap will increase...over time save the re-gap for new plugs?

 

[Oldcar]

Run car and plug gap will increase...over time save the re-gap for new plugs

Hi all,


The time has came to fit new spark plugs to my project 1994 220CE 124 coupe. I have stuck with the tried and tested Bosch F8DC4 plugs on this engine and I am wondering if I should follow advice on other M104 + M119 engines that run that same plug – gapping up to 1mm VS 0.8mm factory spec?


Opinions please

View attachment 76322 View attachment 76323


I know you mericans aren’t familiar with such high CC motors - it’s an m111.960 in this beast But it does have a fresh GVZ approved Oil filler cap so it's OK

You Americans? I know it's a German car but "can't we all just get along"?

 

[Oldcar]

Ok you Americans?......update....plug gap checked after some mileage.......08 to 1.2 mm read ...on plug gaps. ..set gaps at aprox between 1 to 1.1 mm..engine seems to idle a little smoother now...#4 plug needs a small extension and a swivel on top for m119 engine