Ac Mr44t Or Mr43t

[krisnowicki]

I was reading my manual and got ac mr43t plugs per the manual and every ones advice here. I was pulling the old pugs out and they are mr44t what is the difference? Is 43t the application for my engine. 95 5.0?

 

[Don S]

Re: Ac Mr44t Or Mr43t

The 44 is a hotter plug, the manual calls for a 43. Who knows why you have the 44's in there, maybe the previous owner installed the wrong ones.

 

[krisnowicki]

Re: Ac Mr44t Or Mr43t

thanks as always don. Is there anything you dont know?

 

[JustJason]

Re: Ac Mr44t Or Mr43t

I bet he doesn't know my middle name

 

[jhonster]

Re: Ac Mr44t Or Mr43t

The 44 is a hotter plug, the manual calls for a 43. Who knows why you have the 44's in there, maybe the previous owner installed the wrong ones.

My shop manual says the 5.0 for 87 OMC takes an MR44T. MR43T is for the 3.0, 4.3 & 5.7 GM motors. Not sure why they wanted a hotter plug for the 5.0. Less compression? Intake lobe centerline advanced over the 5.7? Wider intake to exh lobe centers?