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

best way to install gaskets?

  • Thread starter Thread starter deadlast
  • Start date Start date Aug 6, 2006

deadlast

New Member
Mar 30, 2005
495
0
0
Belmont, MA
Aug 6, 2006
#1
  • Aug 6, 2006
  • #1
when im installing my lower intake manifold, should i put a bead of gasket maker on the gasket itself, on the intake, or at all?
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,237
17,922
224
Massachusetts
Aug 6, 2006
#2
  • Aug 6, 2006
  • #2
When i do lower intakes, i put a bead of thin silicone around all the water jackets on the heads on both sides of the intake gaskets to really seal them up.

I also used the cork gaskets, but i run a thick bead of silicone on them. Some guys eliminate the cork front and rear gaskets and run a thick bead of silicone there.

To lower the intaske do yourself a favor and go to a hardware store and buy some long 6" or so bolts or threaded studs the same size as the intake bolt threads. You only need two. Cut the heads off the bolt and lightly thread them into the block at the front and rear. Then use them as a guide to lowering the intake down into the engine.
 

04sleeper

Founding Member
Jun 22, 2002
2,674
14
89
Dallas, TX
Aug 6, 2006
#3
  • Aug 6, 2006
  • #3
The best way I have found is to clean every surface to bare metal and spray it clean with brake cleaner.

Then I just use some Blue Permatex to just fill in the imperfections in the metal with my finger around the water ports only. This is for the head surface and the intake surface as well. You do not need a lot of silicone at all, just enough to fill in the imperfections like I said.

I also put a few dabs of silicone in between a few ports to help hold the gasket in place.

For the front and rear of the intake I do not use a gasket. I use a large bead of silicone and set the intake down and let it dry overnight.

I have used this method for many years with no problems.
 

deadlast

New Member
Mar 30, 2005
495
0
0
Belmont, MA
Aug 6, 2006
#4
  • Aug 6, 2006
  • #4
04sleeper said:
The best way I have found is to clean every surface to bare metal and spray it clean with brake cleaner.

Then I just use some Blue Permatex to just fill in the imperfections in the metal with my finger around the water ports only. This is for the head surface and the intake surface as well. You do not need a lot of silicone at all, just enough to fill in the imperfections like I said.

I also put a few dabs of silicone in between a few ports to help hold the gasket in place.

For the front and rear of the intake I do not use a gasket. I use a large bead of silicone and set the intake down and let it dry overnight.

I have used this method for many years with no problems.
Click to expand...

what type of silicone do you use for the front and rear?
 
R

R2D2

Aug 6, 2006
#5
  • Aug 6, 2006
  • #5
black rtv around water jackets, and black rtv for the end seals
 

Blk91stang

Member
Jan 3, 2003
607
0
16
North Brunswick, NJ
Aug 6, 2006
#6
  • Aug 6, 2006
  • #6
04sleeper said:
The best way I have found is to clean every surface to bare metal and spray it clean with brake cleaner.

Then I just use some Blue Permatex to just fill in the imperfections in the metal with my finger around the water ports only. This is for the head surface and the intake surface as well. You do not need a lot of silicone at all, just enough to fill in the imperfections like I said.

I also put a few dabs of silicone in between a few ports to help hold the gasket in place.

For the front and rear of the intake I do not use a gasket. I use a large bead of silicone and set the intake down and let it dry overnight.

I have used this method for many years with no problems.
Click to expand...

GREAT INFO!!!!

I just heard about using some silicone to first push into the metal before laying a bead on to fill in any imperfections and make sure to get good adhesion.
 

04sleeper

Founding Member
Jun 22, 2002
2,674
14
89
Dallas, TX
Aug 8, 2006
#7
  • Aug 8, 2006
  • #7
deadlast said:
what type of silicone do you use for the front and rear?
Click to expand...
I have always used RTV Blue or Black.
 

QDRHRSE

New Member
Dec 31, 2002
1,590
0
0
Palmdale, CA
Aug 8, 2006
#8
  • Aug 8, 2006
  • #8
04sleeper said:
The best way I have found is to clean every surface to bare metal and spray it clean with brake cleaner.

Then I just use some Blue Permatex to just fill in the imperfections in the metal with my finger around the water ports only. This is for the head surface and the intake surface as well. You do not need a lot of silicone at all, just enough to fill in the imperfections like I said.

I also put a few dabs of silicone in between a few ports to help hold the gasket in place.

For the front and rear of the intake I do not use a gasket. I use a large bead of silicone and set the intake down and let it dry overnight.

I have used this method for many years with no problems.
Click to expand...


.....same here. Except I don't let the intake sit over night. Almost any automotive silicone will work....I like blue and black but ultra grey is good too. Just look on the package and will tell you what the intended uses are.
 
B

blue92lx

New Member
Jun 15, 2006
14
0
0
Aug 8, 2006
#9
  • Aug 8, 2006
  • #9
Mustang5L5 said:
When i do lower intakes, i put a bead of thin silicone around all the water jackets on the heads on both sides of the intake gaskets to really seal them up.

I also used the cork gaskets, but i run a thick bead of silicone on them. Some guys eliminate the cork front and rear gaskets and run a thick bead of silicone there.

To lower the intaske do yourself a favor and go to a hardware store and buy some long 6" or so bolts or threaded studs the same size as the intake bolt threads. You only need two. Cut the heads off the bolt and lightly thread them into the block at the front and rear. Then use them as a guide to lowering the intake down into the engine.
Click to expand...

Yeah do yourself a favor and put that silicone around the water ports. The guys I took mine to didn't do that and water trailed out all the way to the intake ports. When I put my lower intake back on I also used an assload of RTV on the intake and block for the front and rear seals. Everyone usually says to just throw out the cork gaskets.

I also wish I knew about that bolt technique as guides to drop the intake down. It's a real pain in the ass to get it perfect just doing it by eye.
 
T

TheUser

Active Member
Jul 25, 2003
1,859
1
36
Springfield, MO
Aug 8, 2006
#10
  • Aug 8, 2006
  • #10
you can get the intake gasket set w/ the rubber ends instead of cork ends: Fel Pro part number MS 93334, but whatever works, I suppose. The studs to align it really helps...I've been doing that for a couple years and it helps a ton.
 
You must log in or register to reply here.

Similar threads

Engine Retorque lower intake manifold bolts
  • 91GTstroked
  • Sep 8, 2025
  • Fox 5.0 Mustang Tech
Replies
3
Views
293
Fox 5.0 Mustang Tech Sep 8, 2025
Noobz347
Engine Catch Can or not?
  • R82148V
  • Mar 4, 2026
  • Fox 5.0 Mustang Tech
Replies
9
Views
351
Fox 5.0 Mustang Tech Mar 6, 2026
ctandc
C
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
E
Chasing Vacuum leak 99 GT
  • EBNS_2005
  • May 2, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
2
Views
142
1996 - 2004 SN95 Mustang -General/Talk- May 3, 2026
X-cam34
X
Engine 95 GT and 95 Cobra sensors and TB gasket
  • Sonic
  • Dec 21, 2025
  • 1994 - 1995 Specific Tech
Replies
1
Views
326
1994 - 1995 Specific Tech Dec 23, 2025
WhiteCobra95
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?