Go Back   Ford Mustang Forums > Mustang > 5.0 Mustang > 5.0L Tech

Welcome to our Mustang forums where Mustangers come together to hang out, discuss and enjoy their favorite Mustang hobby with fellow Mustang enthusiasts. We invite everyone to read, post, and enjoy our Mustang forum as well as the many other sections of our site.

You are currently viewing our forums as a guest. By joining our community you gain access to post topics, communicate with members, upload your photos and access many other special features. Registration is fast, simple and free so why wait, join our Mustang community today! If you have any problems with registration or your account login, please contact support.

5.0 Mustangs Tech Forum

5.0L Talk | 5.0L Tech | 94-95 Tech | 1979-1993   1994   1995   Upload Pictures | Timeslips | Power Adders | Mustang Tech 


Reply   Post New Thread
Unread 10-12-2012   #1 (permalink)
joshuastangs is offline Apprentice

Classic Member


Joined: Feb 2010
Posts: 82 Threads: 52
 joshuastangs's Country Flag
Los Angeles   California
joshuastangs is on a distinguished road
Default Changing Thermostat and using Sealer?

So im going to be changing my 1988 302 thermostat and i noticed in a few videos on youtube of people replacing it. They use some sort of sealer on the housing that they put the gasket over once they've replaced and are ready to put everything back together. They use some sort of silicone? or rtv sealer?

So before i replace my thermostat, can anyone recommend the proper sealer i should use to seal this thing right please.
joshuastangs is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Unread 10-12-2012   #2 (permalink)
need4spd90 is online now SHELBY GT 350 Member

5.0L Member


Joined: Apr 2009
Posts: 6,358 Threads: 45
 need4spd90's Country Flag
Mountain Top   Pennsylvania
need4spd90 is on a distinguished road
Default

permatex ultrablack rtv or "the right stuff". you dont even need a gasket with either of the two
__________________
1987 Notchback - N/A stock 302, TFS heads, Holley Systemax, FTI cam, Astro A5
Best so far: 10.92 @ 123mph with a 1.49 60ft
need4spd90 is online now  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 10-12-2012   #3 (permalink)
cmc87 is offline Banned

5.0L Member


Joined: Jan 2010
Posts: 480 Threads: 29
 cmc87's Country Flag  View cmc87's HomePage
Montreal   Quebec
cmc87 is on a distinguished road
Default

I didn't use any sealant, just the gasket. Made sure all surfaces were nice and clean first. Spray of gasket remover and a razor blade.
img1
http://www.fiveohinfo.com/img/9ndRFsgH/
img 2 http://www.fiveohinfo.com/img/1BWqbSMkew/
No leaks.

Anyways to actually answer your question, like need4spd said, Permatex ultra black RTV.
cmc87 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 10-12-2012   #4 (permalink)
robs91fox is offline PONY Member

5.0L Member


Joined: Oct 2007
Posts: 333 Threads: 47
 robs91fox's Country Flag
Pomfret   Connecticut
robs91fox is on a distinguished road
Default

Personally, I like to use the Permatex high heat RTV (The red stuff) buts thats just personal preference.

Also, specifically on the thermostat housing make sure its SUPER clean. This is a spot that loves to leak if you don't clean it up perfect.
__________________
1991 GT: Trick Flow Track Heat Heads, Trick Flow Stage 1 cam, Ported GT40 Intake, 1.6 Rockers, 24 lb. injectors, 190 LPH Fuel Pump, BBK 70mm TB, BBK Headers, Off-road H, Flowmasters, 3.73's, Eibach Springs, Hotchkis Control Arms, FRPP Alumuinum D/S

2007 GT California Special: Steeda axle-back, K&N cold air
robs91fox is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 10-12-2012   #5 (permalink)
Smurf stang is offline SHELBY GT 500 Member

5.0L Member


Joined: Apr 2009
Posts: 14,080 Threads: 67
 Smurf stang's Country Flag
Miami   Florida
Smurf stang is on a distinguished road
Default

If you use one don't use the other. It always works best with either just the gasket or just the rtv.

Once you go ultra black you never go back.
__________________
2014 V6 Deep Impact Blue Mustang, Borla Type S, 2.73 (Uughh need 3.73)
1989 Sonic Blue Mustang LX Coupe, 349 ci,
392 rwhp 424 rwtq....Mustang Dyno
"There are three kinds of men. The one that learns by reading. The few who learn by observation. The rest of them have to pee on the electric fence for themselves." -Will Rogers-
Smurf stang is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 10-12-2012   #6 (permalink)
RotaryStang is offline Apprentice


Joined: Jun 2010
Posts: 191 Threads: 39
 RotaryStang's Country Flag  View RotaryStang's 12 photos
Wilmington   Delaware
RotaryStang is on a distinguished road
Default

Iv found what works the best is to yes clean the surface very well where the gasket lays. Be careful not to ruin the surface with sandpaper, razor blade, etc..very easy to make the surface uneven. If you look closly there are little levels where the thermo and gasket lay perfectly. Next take the smalliest amout possible of the gasket maker and put it on the lower intake where the gasket would lay. You only want to use it for the gasket to stick in place. You just want it sticky not globbed on or even a layer. Just sticky enough for the gasket to stay. If anything put three pin size dots of the goo. thats all you need. Then continue the rest of the procedure like you would normally. If its going to be cold where you live i would suggest not putting a 180 thermo in for the winter. Your car will never get up to running temp and winter. not good!!!! A lot of people make that mistake. The thermostat is a very cheap part like spak plugs but is very important to your motor like plugs!!!
__________________
98 merc mountaineer short block, E7 heads, b cam, 19lb. EV6 injectors, 75mm tb, 75mm EGR delete spacer, stock maf, screamin demon coil, ford racing 8.8mm. plug wires, autolite #25's, 3.73 rear, refurbed t-5 trans, steeda tri-ax shifter, stage 2 clutch kit, lakewood drag suspension, sve upper and lower control arms, v6 contour fan, bbk shorty headers, bbk catless x-pipe, flowmaster 40s to dumps, 3G 130 alt, welded and bolted subframe connectors
RotaryStang is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Reply   Post New Thread



Thread Tools



Mustang Photos
Mustang Links    Top Sites    RSS    Link To Us    Add to Favorites    Archive    Terms of Use    Site Rules    Privacy    Contact    Sponsors    Advertise   
AllFordMustangs is not affiliated with or endorsed by Ford Motor Company. ©Copyright 2002-2011 All Auto Enthusiasts Network

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162