• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

Lower Intake Gasket??

  • Thread starter Thread starter asecretfile
  • Start date Start date Apr 23, 2008

asecretfile

New Member
Feb 11, 2007
228
0
0
Apr 23, 2008
#1
  • Apr 23, 2008
  • #1
I have read about how on the lower intake some people use the little rubber gaskets, some use RTV only, and some use RTV AND the gaskets. Which color of RTV is best if I was going to use the RTV alone on the ends...is it the ultra blue?

thanks
 

vikingpower

New Member
Dec 6, 2004
656
0
0
CWU Ellensburg, WA
Apr 23, 2008
#2
  • Apr 23, 2008
  • #2
I use Ultra Black. But only use a little bit, because excess will squeeze into the intake port when you torque the manifold.
 

asecretfile

New Member
Feb 11, 2007
228
0
0
Apr 23, 2008
#3
  • Apr 23, 2008
  • #3
vikingpower said:
I use Ultra Black. But only use a little bit, because excess will squeeze into the intake port when you torque the manifold.
Click to expand...

still only use a little if Im using the RTV only? Cause I have also read on here said use a nice size 3/8 bead...cause there is like an 1/8" gap there right now

thanks
 

BlownFiveLiter

have car, will race....wait, it doesn't run
15 Year Member
Nov 29, 1999
3,133
18
108
Chicagoland
Apr 23, 2008
#4
  • Apr 23, 2008
  • #4
You're referring to the two end gaskets where the intake meets the block, right? Just lay down a nice thick bead of black RTV, so the intake will seal when you set it down against the heads. Some do have luck with the cork or rubber gaskets, but I like knowing it's not going to leak the first time. There's a guy in 94-95 who swears by using them, but he's found a method to keep them from blowing off. Use some weatherstripping adhesive to stick them to the block, then put the intake on.
 
8

86bluecobra

Advanced Member
Dec 20, 2004
4,265
12
69
B.C. Canada
Apr 23, 2008
#5
  • Apr 23, 2008
  • #5
yah u need a descent bead. let it setup for 24hrs before firing the car.
 

asecretfile

New Member
Feb 11, 2007
228
0
0
Apr 25, 2008
#6
  • Apr 25, 2008
  • #6
I bought the Felpro MS93334 one and it also leaked a little around the larger gaskets near the top also. Is there a better gasket set I can get for this?

thanks
 

vristang

15 Year Member
Mar 31, 2005
4,933
101
124
Seattle
Apr 25, 2008
#7
  • Apr 25, 2008
  • #7
If you can find the rubber "U" channel gaskets, then you won't need to use silicone.
Just make sure they actually seal against the intake...
 
You must log in or register to reply here.

Similar threads

D
Resolved Intake question
  • d fed
  • Aug 19, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
11
Views
384
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Aug 24, 2025
mattcrp1
M
Engine Explorer - Lower intake internal cleaning
  • R82148V
  • Nov 11, 2025
  • Fox 5.0 Mustang Tech
  • 2 3
Replies
42
Views
1K
Fox 5.0 Mustang Tech Dec 6, 2025
rednotch
Engine Felpro 9333 pt1 (with 8psi boost)
  • JD1964
  • Jan 14, 2026
  • Fox 5.0 Mustang Tech
Replies
18
Views
831
Fox 5.0 Mustang Tech Feb 1, 2026
Qtrhrse23
Engine Catch Can or not?
  • R82148V
  • Mar 4, 2026
  • Fox 5.0 Mustang Tech
Replies
9
Views
387
Fox 5.0 Mustang Tech Mar 6, 2026
ctandc
C
Engine Cleaning Intake valves with lower intake off
  • R82148V
  • Mar 4, 2026
  • Fox 5.0 Mustang Tech
Replies
13
Views
483
Fox 5.0 Mustang Tech Mar 11, 2026
limp
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?