difference between s4/s5 intake irons
#2
MODERATOR
iTrader: (137)
the only irons to date in the 2nd gens that are diffrent are the s4t2 and s5 t2 rear irons otherwise you just have a 6port = n/a or 4 port = turbo, because the s5 are made with a wider casting
#5
HAILERS
Join Date: May 2001
Location: FORT WORTH, TEXAS,USA
Posts: 20,563
Likes: 0
Received 21 Likes
on
19 Posts
See the intermediate housing? Right below the two primary intake ports is a Round hole. This hole on a series four has a *freeze plug* covering that hole. I know it's Not a real freeze plug. Just a descripiton of what it looks like. Well on a series five its a rectangular hole and open and that hole is for the ACV air to the exhaust ports on a series five.
The rear side housing for a series four is to the left. Compare it with what you have.
#6
Rotary Freak
iTrader: (7)
The S4 center iron has a EGR port next to the primary injectors while the S5 is cast completely flush and closed.
The S4 and S5 irons also have different front cover o-ring pedestals. The S4 is just big enough for the o-ring while the S5 is big enough for the o-ring and the tephlon retainer.
The casting around the oil filter pedestals are thicker on S5s as well. The last motor I tore down was an S5 NA block and there was a noticable difference in reinforcement between it and the S4 NA rear iron I had next to it.
The S4 and S5 irons also have different front cover o-ring pedestals. The S4 is just big enough for the o-ring while the S5 is big enough for the o-ring and the tephlon retainer.
The casting around the oil filter pedestals are thicker on S5s as well. The last motor I tore down was an S5 NA block and there was a noticable difference in reinforcement between it and the S4 NA rear iron I had next to it.
#7
HAILERS
Join Date: May 2001
Location: FORT WORTH, TEXAS,USA
Posts: 20,563
Likes: 0
Received 21 Likes
on
19 Posts
The S4 center iron has a EGR port next to the primary injectors while the S5 is cast completely flush and closed.
The S4 and S5 irons also have different front cover o-ring pedestals. The S4 is just big enough for the o-ring while the S5 is big enough for the o-ring and the tephlon retainer.
The casting around the oil filter pedestals are thicker on S5s as well. The last motor I tore down was an S5 NA block and there was a noticable difference in reinforcement between it and the S4 NA rear iron I had next to it.
The S4 and S5 irons also have different front cover o-ring pedestals. The S4 is just big enough for the o-ring while the S5 is big enough for the o-ring and the tephlon retainer.
The casting around the oil filter pedestals are thicker on S5s as well. The last motor I tore down was an S5 NA block and there was a noticable difference in reinforcement between it and the S4 NA rear iron I had next to it.
Trending Topics
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
07-01-23 04:40 PM
stickmantijuana
20B Forum
8
08-18-15 02:46 PM