Another spark plug question

[Pantherfreak]

Greetings everybody.

I have a set of new AGSF32PM (SP-493) plugs sitting here that a buddy was gonna use in his '01 2-valve Mustang, but he's not gonna need them now, so he gave them to me.

My '04 Marauder could use a new set of plugs...but the manual calls for AWSF32EM plugs.

With constant revisions to part numbers, I'm just not sure - are the SP-493s usable in the 4 valve, or are they a no go?

I could use them in my '05 MGM, but it has recent plugs already.

Any input would be greatly appreciated - I'm getting the itch to spend some time under the hood!

[fastblackmerc]

Go to the spark plug manufacturers web site and see the spec of each.

[Pantherfreak]

Sorry - I forgot to mention that they are Motorcraft plugs. Their website is a bit difficult to navigate, as far as spark plug specs.

[fastblackmerc]

I'll do half the work for you.....

AGSF32PM specs:
Center Electrode Core Material: Copper core
Electrode Core Material: Platinum alloy
Electrode Tip Material: Platinum ball
Ground Electrode Core Material: Nickel alloy
Hex Size: 5/8
Insulator Type: Standard
Length: 3.124
Manufacturer Heat Range: 4
Reach: 0.679 in
Resistor: Yes
Rib Configuration: Standard
Seat Type: Tapered
Side Electrode: Yes
Terminal Top Type: Fixed
Thread Diameter: 14 mm
Tip Configuration: Single platinum

[BLACKMARAUDER04]

Jim, What are the Specs for SP505, AGSF22CA or SP505A? I've been using these for years, now the thread size is too small?
What thread size does the Marauder 4.6L have?
Thanks,

P.S. Does anyone have a telephone number for Motorcraft Parts?

[BLACKMARAUDER04]

Fordparts.com telephone number: 844-589-0060

The only Spark plug they recommended was SP413, or AGSF32N, This is a Platinum-Iridium Spark Plug .

The cs person could not tell me the thread size or any specifications.

Any help would be great. I'm looking for a copper plug with a 1 step colder range. Recommended because of the tune in the car.

I can't even find info on the Motorcraft website.

[RubberCtyRauder]

NGK 4177 gapped to .045.. MO's Speed Shop

[fastblackmerc]

NGK 4177 gapped to .045.. MO's Speed Shop

This is the recommended plug......

[BLACKMARAUDER04]

Ordered from Rock Auto for $1.75ea plus shipping


Sent from my iPhone using Tapatalk

[BLACKMARAUDER04]

So, these plugs were the same as the SP505 plugs. I finally figured out why the #5 plug was different. The cylinder has a helix tap on it. Advance Auto had the correct M14-1.25 thread fixer in stock. You need to attach this permanently . Advance wanted $17 for thread lock. Purchased Harbor Freights’ red thread lock for $2.29.
Put the plug in today with a new COP, DG543. No more engine mis-fires.


Sent from my iPhone using Tapatalk

[musclemerc]

^^^ You should have done some research and utilized a lock-n-stitch or something better than a helicoil.

It will fail just question when.

[BLACKMARAUDER04]

I didn’t do it, my mechanic did the tap.
This was probably over a year ago.
He must have thought this was the most logical way to fix this thread.
This was the second time the #5 cylinder blew the spark plug out.


Sent from my iPhone using Tapatalk

[blazen71]

NGK TR6 or whatever number may supersede is the one step colder copper plug

[musclemerc]

I didn’t do it, my mechanic did the tap.
This was probably over a year ago.
He must have thought this was the most logical way to fix this thread.
This was the second time the #5 cylinder blew the spark plug out.


Sent from my iPhone using Tapatalk

My point exactly. Do it right the first time or don't do it at all.

[M91]

NGK 4177 gapped to .045.. MO's Speed ShopShould i gap it? I just installed mine without gapping it🥲

Sent from my Pixel 6 Pro using Tapatalk