Msd Distributor Cap

[THEUNDERCOATER]

my 91 has an msd cap. I want to replace when I do tune up but not sure how to determine proper fitment for the car. The msd site was confusing.

Anyone know of the specie model # for MSD 91 5.0?

Any recommendations on plugs would be appreciated too

Thank you

John

 

[mikestang63]

pretty simple.. Make sure the sqaure notch on the outside of the cap is in the same position as the old cap. The part # is 8482.

Unclip the old cap and lift it out of the way with the wires still on it
Remove the old rotor
Install the new rotor
Install the new cap and clip it down,
Remove one wire at a time off the old cap- put a dab of dielectric grease in the boot and install it on the new cap. Repeat for the remaining 7 plug wires going in a clock wise position,then the coil wire. Make sure you have a solid connection on the cap with the wires.

For plugs, it depends on what your setup is. As a general rule- if you are running a stock engine, most likely you will want autloite 25's unless it's a burning oil or really high mile and then you might want one step hotter to 26. If you run aliminum heads, put some anti sieze on the threads The gap is going to be .55. Do not overtighten the plugs. Just snug and then maybe an 1/8 turn. Again, put some dielectric grease in the spark plug boot.

 

[THEUNDERCOATER]

Thank you appreciate the response!

I'm going to have to soak my current plugs I believe. They are a little rusty looking on the outside I wanna play it safe backing out the old plugs

 

[Mustang5L5]

Stock iron heads? I wouldn't worry too much about it. Spray a little PB blaster and crack em loose.


Sent from my big ass iPhone 6 using Tapatalk

 

[THEUNDERCOATER]

pretty simple.. Make sure the sqaure notch on the outside of the cap is in the same position as the old cap. The part # is 8482.

Unclip the old cap and lift it out of the way with the wires still on it
Remove the old rotor
Install the new rotor
Install the new cap and clip it down,
Remove one wire at a time off the old cap- put a dab of dielectric grease in the boot and install it on the new cap. Repeat for the remaining 7 plug wires going in a clock wise position,then the coil wire. Make sure you have a solid connection on the cap with the wires.

For plugs, it depends on what your setup is. As a general rule- if you are running a stock engine, most likely you will want autloite 25's unless it's a burning oil or really high mile and then you might want one step hotter to 26. If you run aliminum heads, put some anti sieze on the threads The gap is going to be .55. Do not overtighten the plugs. Just snug and then maybe an 1/8 turn. Again, put some dielectric grease in the spark plug boot.

Autolite 25 what I got to replace and all the stats show to gap to .50. Pulled two out of the car already and they say autolite 25 and they look like they were gapped at .46/.47