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Leaded or Unleaded Pinto Head?
Jimtay07 - 9/7/10 at 02:42 PM

Hi, Can anyone help? I have a 2.0l pinto in my MK, i cannot find any info that relates to my engine being leaded or unleaded. I have looked in the usual place for the letters stamped adjacent to spark plug 4 but this is either a 1 or an l, not P, PP, R or RR. The only other info i know is that the engine number means it was build in 1988 and it has a 205 block.

Any advice would be much appreciated.

jabbahutt - 9/7/10 at 03:22 PM

double check this information is correct

SOHC Pinto Engines
All engines produced after 01/89 are suitable for use with unleaded fuel. For all other engines, an identification mark (adjacent to No 4 spark plug) must be present to designate suitability for unleaded. These are:
* 1.6 - M, MM or N, NN
* 1.8 - S, SS
* 2.0 - P, PP or R, RR

so from your post I'd assume rightly or wrongly that it isn't an unleaded head.

Hopefully someone more knowledgeable wll be along to clear things up.

[Edited on 9/7/10 by jabbahutt]

Stott - 9/7/10 at 04:40 PM

My leaded head from an '86 sierra looked like it was stamped 1/l/7 to me, the proper unleaded one I replaced it with was unmistakebly 'R'

blakep82 - 9/7/10 at 07:35 PM

quote:
Originally posted by jabbahutt
double check this information is correct

SOHC Pinto Engines
All engines produced after 01/89 are suitable for use with unleaded fuel. For all other engines, an identification mark (adjacent to No 4 spark plug) must be present to designate suitability for unleaded. These are:
* 1.6 - M, MM or N, NN
* 1.8 - S, SS
* 2.0 - P, PP or R, RR

so from your post I'd assume rightly or wrongly that it isn't an unleaded head.

Hopefully someone more knowledgeable wll be along to clear things up.

[Edited on 9/7/10 by jabbahutt]


i'd agree with that.
however, i heard somewhere that leaded engines, if they have a build up of leaded fuel deposits, will be fine for a few thousand miles on unleaded fuel. that was from mini enthusiasts, so, i don't know if its really the same for pintos

Jimtay07 - 9/7/10 at 08:07 PM

Thanks for your help guys, think i'll have to run it on unleaded when the time comes and see.