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bosch platinum 4208 plugs

Discussion in 'The Garage' started by R72K5, Aug 5, 2005.

  1. R72K5

    R72K5 Banned

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    4208 bosch platinum plugs

    would these be ok for a stock untouched '70's 350 engine running 90 octane and stock timing/advance ?

    anyone have any idea how to decode bosch numbers and can find out heat range and all that ?

    i have a box of these brand new ive never used, so i thought id try and find out about them to see if i wanna use them or toss them

    thanks for anything
     
  2. diesel4me

    diesel4me 1 ton status Premium Member

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    some advice..

    I dont have a conversion chart...but I'd toss them and buy AC or Autolites...we had many cars we put Bosch platinum plugs in that ran worse AFTER the tune up than when they came in!..more than a few had a "skip".like it had a dead plug wire--pull the plug out,and they looked like they were brand new--but they misfired!..put the old plug back in (or a new AC or autolite) and it ran fine again! :screwy: ..

    I guess they only work right in certain vehicles that require platinum plugs,like 2000 up models...had no luck with them in my older trucks,and many cars at the shop I tried them in..some went a week or two before croaking,some never fired right out of the box... :doah: :crazy:
     
  3. R72K5

    R72K5 Banned

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    wow, very interesting,

    anyone else have any info on this one

    what about the supers by bosch ?

    ive run them in a few chevies in the past and had no issues,

    is it the platinums that arent so good ?
    i dont like how the electrodes look on the plats, look like tiny electrode tips
    big time..

    hmmm


    thanks
     
  4. puckhead

    puckhead 1/2 ton status

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    Bosch platinum plugs arent made for old school mouse motors. Whenever we have a car with bosch platinums come into the shop its usually has a running problem.

    In fact ive had emission failures with brand new bosch platinums and all I've done is change plugs and they sail right thru.

    IMO Bosch platinums are junk give me a Ac Delco platinum pro over a bosch any day or an Autolite or a Champion just anything but bosch platinum

    Now that being said I have not fooled around with the supers, and near as I can tell those +4 platinums are in the same boat as the regular platinums
     

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