T-housing: use gasket or RTV

my2monkeys

NAXJA Member

Location

Mission Viejo, CA

• Mar 6, 2017

• #1

My t-housing keeps leaking with a new gasket. thinking of using RTV only.

What do you think?

The gaskets have a glue on one side like a sticker and that just aint sealing it well.

I have even sanded the housing flat to remove low spots from corrosion and still leaks.

 

Johnnie Walker

Piece of Fish!

NAXJA Member

Location

WA state

• Mar 6, 2017

• #2

The past few times I have used gasket and gasgachinch sp? But some blue RTV would be fine

 

H

Heavyopp

NAXJA Forum User

Location

Middlesex, NJ

• Mar 6, 2017

• #3

Why not use both?

I'll usually coat the gasket with rtv -- a thin coat, spread with my fingers, both sides coating the entire gasket

Works every time

 

M

md21722

NAXJA Forum User

Location

TN

• Mar 6, 2017

• #4

I just use the gasket. If it ain't sealing well, your t-stat housing may be warped. If the thermostat slips down out of its place and the bolts are tightened, its nearly a sure bet that your t-stat housing is warped.

 

J

Jeep Driver

NAXJA Forum User

Location

Parrottsville

• Mar 6, 2017

• #5

Permatex 2 where water and pressure are present.

 

ehall

NAXJA Member

NAXJA Member

Location

Southern Maryland

• Mar 6, 2017

• #6

with two flat surfaces, you should not need anything more than paper gasket

 

S

sinat01

NAXJA Forum User

Location

Preston county, WV

• Mar 6, 2017

• #7

Just use a felpro gasket, never had a leak with it

 

I

iwannadie

NAXJA Forum User

Location

Gilbert, Az

• Mar 6, 2017

• #8

I always use the permatex theremostat housing rtv junk. My surface is kinda pitted and it always seems to seal up fine.

 

M

ManNamedJed

NAXJA Forum User

Location

Reno

• Mar 6, 2017

• #9

Have you tried a new housing? They can get warped. Doesn't take much to have it never seal right.

 

X

XJalltheway85

NAXJA Forum User

Location

Colorado

• Mar 6, 2017

• #10

I agree, check to see if your housing is warped. Nothing wrong with using just rtv, or rtv and the gasket. Last time I did mine I used the gasket and sprayed both sides and surfaces with permatex high tack gasket sealant, https://www.permatex.com/products/gasketing/gasket-sealants/permatex-high-tack-gasket-sealant/ , I prefer the aerosol version, but this is the same stuff. Works great, never had an issue with leakage.

 

Ecomike

NAXJA# 2091

NAXJA Member

Location

MilkyWay Galaxy

• Mar 7, 2017

• #11

RTF alone is tricky and can leak, Sounds like you have a bad T-stat housing. Or trash in the bolts holes and the bolts are not clamping the housing down tight as they are bottoming out on trash in the threads or hole bottom? Have you cleaned the threads on the holes and bolts properly? I use a tap, a wire brush and a vacuum.