|
Ideas on sealing header bolt?
#2422126
12/22/17 12:35 AM
12/22/17 12:35 AM
|
Joined: Oct 2008
Posts: 370 Suffolk County, New York
1mean340
OP
enthusiast
|
OP
enthusiast
Joined: Oct 2008
Posts: 370
Suffolk County, New York
|
Ever since I fired this new motor up with the w2 econo heads I've been having issues with the passenger rear header bolt leaking coolant. At first, it was trickling out a little bit when I used ARP thread sealant. I put it back in using copper RTV instead and I had no more wetness/dripping on the outside, but I was still getting occasional little puffs of white smoke out from around that primary almost as if it was leaking inside of primary. I pulled the header gasket out and it looks like it was wet all around the bolt and possibly caused the gasket to leak where the antifreeze softened it (which would explain the smoke trails).
Not really sure what to use at this point, anything thicker/more durable than RTV? Never had this issue before, and even the front header bolt which is also a wet hole never has any issues with just using the Arp sealant.. No cracks I can see around the port or bolt area, just seems like it's pushing out the threads. Could excessive pressure in the coolant system cause this? Compression test showed all cylinders within 5 psi of eachother but haven't done a leakdown yet.
Thanks!
Last edited by 1mean340; 12/22/17 12:38 AM.
|
|
|
Re: Ideas on sealing header bolt?
[Re: 1mean340]
#2422145
12/22/17 01:08 AM
12/22/17 01:08 AM
|
Joined: Dec 2007
Posts: 12,592 Great Neck,LI,new york
hemi-itis
I Live Here
|
I Live Here
Joined: Dec 2007
Posts: 12,592
Great Neck,LI,new york
|
I use the silver solder,same results as the Bars Leak.No header gasket just high temp RTV.
HEMI-ITIS has no cure. My condition is fully BLOWN!!
|
|
|
Re: Ideas on sealing header bolt?
[Re: humpty]
#2422146
12/22/17 01:09 AM
12/22/17 01:09 AM
|
Joined: Feb 2005
Posts: 20,201 PA.
pittsburghracer
"Little"John
|
"Little"John
Joined: Feb 2005
Posts: 20,201
PA.
|
An old pipefiter taught me a trick. Use Teflon tape making sure you put the tape on right so it gets tighter as you screw it in but then he would wipe a light coat of Teflon pipe dope on the tape. Works for me but I also use a stud whenever possible which really seems to help. I just hope your W2 Head isn’t cracked like mine was
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
|
|
|
Re: Ideas on sealing header bolt?
[Re: pittsburghracer]
#2422193
12/22/17 03:14 AM
12/22/17 03:14 AM
|
Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
|
I also use a stud whenever possible that is what I would do, is get a regular OE type fine/coarse double end shouldered stud. You can shorten the outer fine thread end so only enough remains so when the nut is torqued, it is flush with the end of the stud as any more is a waste & hampers header fitment over the stud. & use some viscous sealer on the threads that go into the head.
live every 24 hour block of time like it's your last day on earth
|
|
|
Re: Ideas on sealing header bolt?
[Re: 1mean340]
#2422530
12/23/17 12:56 AM
12/23/17 12:56 AM
|
Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
master
|
master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
|
Indian head / aviation sealant on a stud.
"use it 'till it breaks, replace as needed"
|
|
|
Re: Ideas on sealing header bolt?
[Re: MR_P_BODY]
#2422626
12/23/17 12:36 PM
12/23/17 12:36 PM
|
Joined: Oct 2011
Posts: 3,036 bean town ....Ca
WHITEDART
master
|
master
Joined: Oct 2011
Posts: 3,036
bean town ....Ca
|
I use a can of Bars Leak in all my builds... it should stop it I use the bars with a copper flake. Also have had really good results with alumaseal powder...🤘
In the 8s N/A.with Brett miller W8's 5.07 at 133 at 2700lb
|
|
|
Re: Ideas on sealing header bolt?
[Re: 1mean340]
#2422943
12/24/17 01:15 AM
12/24/17 01:15 AM
|
Joined: Oct 2003
Posts: 7,506 Az
Crizila
master
|
master
Joined: Oct 2003
Posts: 7,506
Az
|
Stud it with good ole hardening permatex.
Last edited by Crizila; 12/24/17 01:16 AM.
Fastest 300
|
|
|
|
|
|