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

Cooling Jacket Pitting Idea's?

  • Thread starter Thread starter BoostedRed89gt
  • Start date Start date Aug 9, 2026

BoostedRed89gt

Member
Dec 19, 2019
11
1
13
Albany, OH
Aug 9, 2026
#1
  • Aug 9, 2026
  • #1
Pulled intake on the car yesterday to get it cleaned up and resealed and found #1 cooling jacket has minor pitting, #8 has pretty severe.

The intake bolt that goes through the coolant pipe didn't feel good when removing and upon inspection looks like a helicoil has come loose? Assuming since Edelbrock aluminum head and relatively low torqued to hold an intake probably wasn't helicoil from Edelbrock and is a failing repair?

I have had people say to pull the head and get it welded and also JB weld and send it?
You all experienced this before and what paths to repair did you take?

Pull one head I guess I should pull both and send out to get gone through?
Engine has approximately 20-25 years on it originally Keith Craft 306 with vortech.
I don't know prior history. Guessing old coolant allowed current path to do this pitting damage.

Looking for help, ideas, experience, thanks.

Worst jacket back of driver side head, heads are ported worth saving or would newer heads flow better?


Falied helicoil repair?


Front pass side by #1 cooling jacket just minimal
 

limp

wrap a little cheese around it and its a done
5 Year Member
Oct 4, 2020
5,517
2,937
173
Florida
Aug 9, 2026
#2
  • Aug 9, 2026
  • #2
Minor??? Who rated that? Look kinda bad to me
 

BoostedRed89gt

Member
Dec 19, 2019
11
1
13
Albany, OH
Aug 9, 2026
#3
  • Aug 9, 2026
  • #3
Compared to #8 jacket nightmare
 

AeroCoupe

lube between the nut and the face. I know my lubes
Founding Member
Oct 28, 2001
6,178
4,271
183
Claremore, OK
Aug 9, 2026
#4
  • Aug 9, 2026
  • #4
You can remove the failed heli-coil and replace that yourself. YouTube that.

I would pull the heads with that many years and have them gone through and fixed properly. Do you know the pecs on the cam as the machine shop will need them to put the right spring gs on the heads.

As for replacing the heads it all depends on what is on there. I would have them put on a bench and flowed before I made any decisions.
 
Reactions: BoostedRed89gt

BoostedRed89gt

Member
Dec 19, 2019
11
1
13
Albany, OH
Aug 9, 2026
#5
  • Aug 9, 2026
  • #5
F303 is what I read when car was in the magazine. Appreciate it. Leaning towards pulling both pressure check, rebuild and weld/mill. Still way cheaper than $4k all in to swap to new tags and ancillary required parts. Just have to fine competent machine shop. Not easy especially living in rural SE OH.
 

BoostedRed89gt

Member
Dec 19, 2019
11
1
13
Albany, OH
Aug 9, 2026
#6
  • Aug 9, 2026
  • #6
Think I can reuse the gasket at least lol.

 

BoostedRed89gt

Member
Dec 19, 2019
11
1
13
Albany, OH
Aug 9, 2026
#7
  • Aug 9, 2026
  • #7
I’m into this car for $5k in parts already. Hope it runs good once back together starting to get overwhelming. Still have to redo fuel system. No way I trust anything on car I haven’t installed now.
 
Reactions: gkomo

BoostedRed89gt

Member
Dec 19, 2019
11
1
13
Albany, OH
Aug 9, 2026
#8
  • Aug 9, 2026
  • #8
You guys have any idea where I can get intake lower stripped all of that spray paint while off and about to be stripped of parts?
 

AeroCoupe

lube between the nut and the face. I know my lubes
Founding Member
Oct 28, 2001
6,178
4,271
183
Claremore, OK
Aug 9, 2026
#9
  • Aug 9, 2026
  • #9
Hot tank it at the machine shop.
 
Reactions: General karthief

Bullitt347

I have been doing it wrong this whole time
15 Year Member
Mar 23, 2007
4,028
3,040
204
Middle of Maine
Aug 9, 2026
#10
  • Aug 9, 2026
  • #10
If this were my engine, in a car that was not being raced, but a daily driver that was used for normal driving, I would clean the cylinder head and intake gasket surface thoroughly, lay a bead of Permatex Ultra Grey around the coolant port, use a good Fel-Pro gasket and bolt it together and drive it. Then, years later, when I wanted to rebuild the whole engine or perform significant upgrades, then I would address the corrosion concern.
That area only sees coolant pressure and engine temperature. A good gasket and Ultra Grey silicone will last just fine.
 
Reactions: General karthief and Blackhawkxx

Blackhawkxx

Mustang Master
Mar 3, 2023
558
556
103
Aug 9, 2026
#11
  • Aug 9, 2026
  • #11
I have seen some minor pitting in the same areas before and have wondered if it wasn't from the RTV I always use around them as it never had old nasty coolant in the engine.
 

BoostedRed89gt

Member
Dec 19, 2019
11
1
13
Albany, OH
Aug 16, 2026
#12
  • Aug 16, 2026
  • #12
Lower intake at machine shop / welder.
Cylinder heads I schlepped up there Friday to get welded. Have to follow up on monday the heads have receiver grooves cut into them for the felpro 1006 head gaskets that run $100 each. Going to see about getting these machined off milling the heads so I can use felpro $60 a pair composite head gaskets.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,347
18,081
224
Massachusetts
Aug 17, 2026
#13
  • Aug 17, 2026
  • #13
I've JB welded repaired similar pitting. Plug the port, apply the JB weld and stand by as it cures. Eventually it reached a point where it's very easy to sand it down. I'd do that with a vac handy, and then let it fully cure. Some cleanup and seal.

Both repairs of i've have held fine for years.
 
Reactions: General karthief and BoostedRed89gt
You must log in or register to reply here.

Similar threads

M
Progress Thread mnky99 2001 V6 evap core, ac compressor, heater core replacement
  • mnky99
  • Sep 5, 2025
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
1
Views
649
1996 - 2004 SN95 Mustang -General/Talk- Sep 5, 2025
mnky99
M
Place to Avoid: Jamison Auto Group in Gulfport, MS
  • D Durden
  • Oct 20, 2025
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • 2 3
Replies
46
Views
3K
1965 - 1973 Classic Mustangs -General/Talk- Jul 16, 2026
Noobz347
For Sale 3-owner 1987 Mustang GT, $18K obro, Lancaster CA
  • Bill Cool
  • Oct 6, 2024
  • Fox Body Mustangs For Sale (1979-93)
Replies
4
Views
2K
Fox Body Mustangs For Sale (1979-93) Oct 13, 2024
nickyb
J
1995 Mustang V6 - Cyl #3 Misfire - Help!
  • JasonBlue
  • Aug 30, 2023
  • 1994 - 1995 Specific Tech
  • 2
Replies
34
Views
5K
1994 - 1995 Specific Tech Oct 20, 2023
def_68
D
Fox Build ideas for the 'Hudson Heap' (87 GT)
  • MadSquirrelTech
  • Sep 19, 2023
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
20
Views
5K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Sep 27, 2023
MadSquirrelTech
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
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?