standard bore size of a 98 4.6

[jasons_98gt]

does anyone know what it is? reason im asking is im buying new pistons and i noticed theres a bunch of different sizes

3.551, 3.552 3.556, 3.558 in etc etc.
really appreciate it. thanks

[Ares]

3.552 is standard for all 4.6 and 5.4

[jasons_98gt]

thanks really appreciate it

[jasons_98gt]

im looking at hypereutectic piston on summit racing and dont want to spend a bunch of money on forged pistons.
I know you said the standard bored is 3.552 but these pistons are only offered in a 3.551 whats the deal?
they only have the expensive shit in
this is what i was looking at
http://www.summitracing.com/parts/SLP-H591CP/
can they still be used or?

[sinful rides]

Yes you can use them. .001" will give you a nice slip fit like the piston should be. The rings make up for the difference in size.

[jasons_98gt]

awesome thanks alot!

another question, sorry this is the first motor i ever did.
I bought piston rings, standard size cause i was going to re-use the old pistons before i noticed the teflon surface was worn out.

the oil rings and center rings fit on all pistons but the top compression ring was to thick to fit in the rail???
i checked over and over and these are the right rings. 1.5 1.5 and 3mm
i thought there might of been a difference between mustang and lincoln 4.6's but i get the same part number every website i look on.

[Ares]

1.5mm top and 2nd ring with 3mm Oil ring is the normal size. Sounds like the ring set you have is wrong. What are you doing with motor. Just a general rebuild?

[SK@StreetLethal]

Jason feel free to give us a call at the shop monday and I can help guide you thru this with some advise.

[jasons_98gt]

thats what i thought for sure i got the wrong rings. I put the rings side the by side and the middle and upper ring are the same thickness.
Im wondering if ford used different pistons because first of all im using a 4.6 from a lincoln towncar.

granted its still the 4.6 i ordered rings for the lincoln NOT the mustang.
The top ring fits in the piston groove of the mustang, but not the lincoln.
I got new pistons on the way anyways so maybe that will clear this up