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sealing header bolts for water leaks? #1579211
02/15/14 12:38 PM 02/15/14 12:38 PM
Joined: Jul 2003
Posts: 3,378
Rancho Cordova, CA
Exit1965 Offline OP
master
Exit1965  Offline OP
master

Joined: Jul 2003
Posts: 3,378
Rancho Cordova, CA
So far we've tried dry.. then teflon tape. Also tried bars leaks and a pellet type of stop leak. Still leaks on at least 3 of the bolts.

We're using the same size bolts we used in the past with no leaks, only difference is that maybe the threads were cleaned out while having a valve job done.

So, if an engine is in-car, with water in it, what is the best sealant method for header bolts? We cannot use studs
Re: sealing header bolts for water leaks? [Re: Exit1965] #1579212
02/15/14 12:45 PM 02/15/14 12:45 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 52,972
Romeo MI
Quote:

So far we've tried dry.. then teflon tape. Also tried bars leaks and a pellet type of stop leak. Still leaks on at least 3 of the bolts.

We're using the same size bolts we used in the past with no leaks, only difference is that maybe the threads were cleaned out while having a valve job done.

So, if an engine is in-car, with water in it, what is the best sealant method for header bolts? We cannot use studs



Drain the water down... then use high temp silicone
and let it set up
EDIT
Also spray the bolt holes out with brake clean

Last edited by MR_P_BODY; 02/15/14 12:51 PM.
Re: sealing header bolts for water leaks? [Re: MR_P_BODY] #1579213
02/15/14 01:17 PM 02/15/14 01:17 PM
Joined: Jan 2003
Posts: 21,076
Niles , Ohio
T
therocks Offline
oh wait.but hey.lets see.oh yeah.
therocks  Offline
oh wait.but hey.lets see.oh yeah.
T

Joined: Jan 2003
Posts: 21,076
Niles , Ohio
When I ran all bolts I used silver anti sieze.It didnt leak.We run studs now.Only place I have a bolt is where the studs wont work.Rocky

Chrysler Firepower
Re: sealing header bolts for water leaks? [Re: Exit1965] #1579214
02/15/14 03:11 PM 02/15/14 03:11 PM
Joined: Jul 2004
Posts: 19,318
State of confusion
T
Thumperdart Offline
I Live Here
Thumperdart  Offline
I Live Here
T

Joined: Jul 2004
Posts: 19,318
State of confusion
Studs and silicone.................

72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: sealing header bolts for water leaks? [Re: Thumperdart] #1579215
02/15/14 03:28 PM 02/15/14 03:28 PM
Joined: Jan 2003
Posts: 3,048
Richmond, Tx. (Houston)
GTSDave Offline
master
GTSDave  Offline
master

Joined: Jan 2003
Posts: 3,048
Richmond, Tx. (Houston)
I use high temp red RTV. Like they said above, drain the water down first.

I usually goop a bit on the end, and along the threads, then let it squish out and wipe off the extra before it drys.

Works fine on two of my cars that use all bolts on the headers.

-Dave

PLEASE Pray for our brothers and sisters in harms way.

If you are the owner of a GTS us at the GTS Registry www.gtsregistry.com
Re: sealing header bolts for water leaks? [Re: GTSDave] #1579216
02/15/14 03:48 PM 02/15/14 03:48 PM
Joined: Oct 2005
Posts: 8,882
Ontario, Canada
S
Stanton Offline
Don't question me!
Stanton  Offline
Don't question me!
S

Joined: Oct 2005
Posts: 8,882
Ontario, Canada
Plumbers run into this problem all the time and for years have been using pipe/thread sealant.
Re: sealing header bolts for water leaks? [Re: Exit1965] #1579217
02/15/14 04:17 PM 02/15/14 04:17 PM
Joined: Apr 2012
Posts: 18,880
-
R
RSNOMO Offline
Moparts Torchbearer
RSNOMO  Offline
Moparts Torchbearer
R

Joined: Apr 2012
Posts: 18,880
-
Permatex Hi-temp thread sealant on a stainless bolt...
Re: sealing header bolts for water leaks? [Re: Exit1965] #1579218
02/15/14 06:59 PM 02/15/14 06:59 PM
Joined: Jan 2003
Posts: 6,531
Jacksonville, FL
Chris2581 Offline
master
Chris2581  Offline
master

Joined: Jan 2003
Posts: 6,531
Jacksonville, FL
Pipe thread sealant with Teflon or Permatex Aviation sealant.

Nautilus Racing-
We use Superformance gaskets and Turbo Action converters/products.
Re: sealing header bolts for water leaks? [Re: Exit1965] #1579219
02/15/14 09:41 PM 02/15/14 09:41 PM
Joined: Nov 2013
Posts: 712
Southern Alberta
Uberpube Offline
super stock
Uberpube  Offline
super stock

Joined: Nov 2013
Posts: 712
Southern Alberta
Masters metallic thread sealant.
Re: sealing header bolts for water leaks? [Re: Chris2581] #1579220
02/15/14 10:37 PM 02/15/14 10:37 PM
Joined: Dec 2012
Posts: 1,824
Wind Gap,Pa.
S
Sammy Offline
top fuel
Sammy  Offline
top fuel
S

Joined: Dec 2012
Posts: 1,824
Wind Gap,Pa.
Quote:

Pipe thread sealant with Teflon or Permatex Aviation sealant.




I like this the best. The one in the jar with the brush. No leaks ever.
Re: sealing header bolts for water leaks? [Re: Sammy] #1579221
02/15/14 11:08 PM 02/15/14 11:08 PM
Joined: Jul 2003
Posts: 3,378
Rancho Cordova, CA
Exit1965 Offline OP
master
Exit1965  Offline OP
master

Joined: Jul 2003
Posts: 3,378
Rancho Cordova, CA
Quote:

Quote:

Pipe thread sealant with Teflon or Permatex Aviation sealant.




I like this the best. The one in the jar with the brush. No leaks ever.



Which, the aviation sealant(brown stuff), or the pipe thread sealant with teflon?
Re: sealing header bolts for water leaks? [Re: Exit1965] #1579222
02/15/14 11:38 PM 02/15/14 11:38 PM
Joined: Dec 2012
Posts: 1,824
Wind Gap,Pa.
S
Sammy Offline
top fuel
Sammy  Offline
top fuel
S

Joined: Dec 2012
Posts: 1,824
Wind Gap,Pa.
Quote:

Quote:

Quote:

Pipe thread sealant with Teflon or Permatex Aviation sealant.




I like this the best. The one in the jar with the brush. No leaks ever.



Which, the aviation sealant(brown stuff), or the pipe thread sealant with teflon?




The permatex pipe thread sealant with Teflon, the white paste. once it hardens,it won't leak.
Just let it set up over night.
Re: sealing header bolts for water leaks? [Re: Thumperdart] #1579223
02/16/14 12:03 AM 02/16/14 12:03 AM
Joined: Jul 2003
Posts: 4,085
The Wet Coast, Canada
megajoltman Offline
master
megajoltman  Offline
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Joined: Jul 2003
Posts: 4,085
The Wet Coast, Canada
Quote:

Studs and silicone.................





1969 Dart 383/727/D60

CTD Ram 4x4 Mega Cab

Procharged 350Z
Re: sealing header bolts for water leaks? [Re: Sammy] #1579224
02/16/14 12:35 AM 02/16/14 12:35 AM
Joined: Aug 2010
Posts: 343
S.E.Mich
D
drew72 Offline
enthusiast
drew72  Offline
enthusiast
D

Joined: Aug 2010
Posts: 343
S.E.Mich
Quote:

Quote:

Quote:

Quote:

Pipe thread sealant with Teflon or Permatex Aviation sealant.




I like this the best. The one in the jar with the brush. No leaks ever.



Which, the aviation sealant(brown stuff), or the pipe thread sealant with teflon?




The permatex pipe thread sealant with Teflon, the white paste. once it hardens,it won't leak.
Just let it set up over night.



"The Green Stuff" pipe dope works even better. It's high temp. Get it at the hardware store.
Re: sealing header bolts for water leaks? [Re: drew72] #1579225
02/16/14 02:01 AM 02/16/14 02:01 AM
Joined: Oct 2005
Posts: 8,882
Ontario, Canada
S
Stanton Offline
Don't question me!
Stanton  Offline
Don't question me!
S

Joined: Oct 2005
Posts: 8,882
Ontario, Canada
Guys, the whole purpose of Teflon is "high temp"! They don't make no-slip frying pans with Teflon because it's slippery, they make it with Teflon because it can take the heat!
Re: sealing header bolts for water leaks? [Re: Exit1965] #1579226
02/16/14 02:02 AM 02/16/14 02:02 AM
Joined: Jan 2003
Posts: 6,531
Jacksonville, FL
Chris2581 Offline
master
Chris2581  Offline
master

Joined: Jan 2003
Posts: 6,531
Jacksonville, FL
Quote:

Quote:

Quote:

Pipe thread sealant with Teflon or Permatex Aviation sealant.




I like this the best. The one in the jar with the brush. No leaks ever.



Which, the aviation sealant(brown stuff), or the pipe thread sealant with teflon?



I usually use the teflon on the intake bolts and the Permatex Aviation on the header bolts,but I have used both either way with great results.

Nautilus Racing-
We use Superformance gaskets and Turbo Action converters/products.
Re: sealing header bolts for water leaks? [Re: Stanton] #1579227
02/16/14 02:01 PM 02/16/14 02:01 PM
Joined: Aug 2010
Posts: 343
S.E.Mich
D
drew72 Offline
enthusiast
drew72  Offline
enthusiast
D

Joined: Aug 2010
Posts: 343
S.E.Mich
Quote:

Guys, the whole purpose of Teflon is "high temp"! They don't make no-slip frying pans with Teflon because it's slippery, they make it with Teflon because it can take the heat!



You don't have a clue, do you. Of course teflon is used in frying pans because it's slippery. THATS WHAT IT DOES! I used to use white teflon on copper pipe threads, then sweat the fitting next to it. The teflon would sometimes melt and form a leak. When I switched to the "Green Stuff" I have never had a leak since. So I guess it works.
Re: sealing header bolts for water leaks? [Re: drew72] #1579228
02/16/14 05:36 PM 02/16/14 05:36 PM
Joined: Mar 2006
Posts: 9,856
MI, usa
dvw Offline
master
dvw  Offline
master

Joined: Mar 2006
Posts: 9,856
MI, usa
I use GM teflon sealer available at the Dealer. Since I started using it 10 years ago, I've never had another leak.
Doug
Re: sealing header bolts for water leaks? [Re: dvw] #1579229
02/16/14 06:57 PM 02/16/14 06:57 PM
Joined: Oct 2005
Posts: 8,882
Ontario, Canada
S
Stanton Offline
Don't question me!
Stanton  Offline
Don't question me!
S

Joined: Oct 2005
Posts: 8,882
Ontario, Canada
Quote:

Quote:

Guys, the whole purpose of Teflon is "high temp"! They don't make no-slip frying pans with Teflon because it's slippery, they make it with Teflon because it can take the heat!



You don't have a clue, do you. Of course teflon is used in frying pans because it's slippery. THATS WHAT IT DOES! I used to use white teflon on copper pipe threads, then sweat the fitting next to it. The teflon would sometimes melt and form a leak. When I switched to the "Green Stuff" I have never had a leak since. So I guess it works.



Actually, I have a VERY good clue. Teflon has a melting point of 621 degrees. So while it may have melted in your plumbing exercise, it will generally hold up on a frying pan and most certainly as a sealant on any engine.

Furthermore, just about every plastic has a low coefficient of friction and some even lower than teflon, UHMW being one of them. What they lack however, is the high continuous operating temperature and melting point of teflon. So the MAIN reason teflon is used in frying pans is because of its ability to stand up to heat. And as a matter of fact, teflon is VERY SELDOM used "because its slippery". The fact is, teflon is very soft and cannot withstand much force before deforming. When you want "slippery" you use a dense plastic, like UHMW.
Re: sealing header bolts for water leaks? [Re: Stanton] #1579230
02/16/14 07:05 PM 02/16/14 07:05 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 52,972
Romeo MI
Being that he tried the teflon already I really doubt
he will try it a gain
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