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

Question about head bolts

  • Thread starter Thread starter redneck15431
  • Start date Start date Dec 24, 2006
R

redneck15431

Member
May 13, 2006
83
3
9
Dec 24, 2006
#1
  • Dec 24, 2006
  • #1
I put gt-40 irons on my car and I forgot to put pipe dope or thread sealer on my lower head bolts...after i almost got everything on the engine assembled...ahhhh! Should/can I take the lower head bolts out and put some pipe dope on them without unbolting everything else? As long as the top bolts are still torqued to spec it would be alright I'd imagine, just as long as I take them out and put them back in one at a time, right?. Or should I not worry about it?
Thanks.
 

Blk91stang

Member
Jan 3, 2003
607
0
16
North Brunswick, NJ
Dec 24, 2006
#2
  • Dec 24, 2006
  • #2
Take one out at a time starting with the middle one.

Here are the steps to go by redoing the LOWER headbolts, not uppers as they are ok.

1) Drain coolant from motor as BEST as you can. The more gone the less chance of having a leak. If possible, unscrew the drain from block on the drivers side, under the car on the side.

2) Pull out middle headbolt from one side

3) Spray brake cleaner in hole, use air compressor or let air dry to dry out the holes. Make sure not to use too much air since it may splash coolant back onto the threads.

4) Use a generous amount of ULTRA BLACK RTV on the head bolt threads. I HIGHLY recommend this stuff because I had a problem with teflon products and this stuff sealed it NO PROBLEM!

5) Torque directly to your torque setting whatever that may be. No need to do it in steps this time.

6) Continue this procedure for the rest going from the inside bolts, out.

Let the car sit for a couple hours to make sure the RTV drys well and start it up. Keep an eye out near top of the headbolts for leaks.

Shouldn't have any problems after this as I followed this same procedure with no leaks and 8psi of boost!
 
R

redneck15431

Member
May 13, 2006
83
3
9
Dec 24, 2006
#3
  • Dec 24, 2006
  • #3
Phew, thats a relief. The engine has not been run yet and I haven't filled it up with fluids yet so I think it will be okay. I have been using the red high temp silicone but I think I also have a tube of black laying around somewhere.
Anyways thanks a lot
 
R

redneck15431

Member
May 13, 2006
83
3
9
Dec 24, 2006
#4
  • Dec 24, 2006
  • #4
One more question. Is it also necessary to retorque the upper head bolts after I do this? It's not really a big deal if I have to because all I have to do is unbolt the valve covers.
Thanks again.
 
T

TheUser

Active Member
Jul 25, 2003
1,859
1
36
Springfield, MO
Dec 25, 2006
#5
  • Dec 25, 2006
  • #5
If you've already torqued the top bolts and haven't loosened them since, then they should be ok. Once you get the bottom ones torqued down, you might go back over all of them (top and bottom) in the proper sequence to make sure they're all satisfactory.
 
You must log in or register to reply here.

Similar threads

G
Engine Pushrod Length Question
  • germain101
  • Sep 22, 2025
  • Fox 5.0 Mustang Tech
Replies
12
Views
507
Fox 5.0 Mustang Tech Sep 25, 2025
Noobz347
6
Hey all,I’m putting together a 302 for my 1968 Mustang and wanted to post the combo + some questions to make sure I’m not missing crucial
  • 68_Disgustang
  • Feb 22, 2026
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
4
Views
699
1965 - 1973 Classic Mustangs -General/Talk- Today at 9:06 AM
gray owl
G
A
Discussion on mild budget build/ top end
  • Acesario
  • Feb 21, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
20
Views
655
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Feb 23, 2026
General karthief
9
Milton Questions, 351 swap newedge
  • 996stang
  • Jul 20, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
1
Views
197
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jan 25, 2026
Killer351w
K
C
1965 Mustang Lower Control Arm Question.
  • chopper1876
  • Nov 9, 2024
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
19
Views
828
1965 - 1973 Classic Mustangs -General/Talk- Dec 7, 2024
GOvert
G
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?