• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 1994 - 1995 Specific Tech

Car burning oil? (Thinking of replacing valve seals)

  • Thread starter Thread starter Labora
  • Start date Start date Jul 26, 2010

Labora

Founding Member
Jun 11, 2000
1,854
26
69
Dallas, Texas
Jul 26, 2010
#1
  • Jul 26, 2010
  • #1
I've probably put around 2000~ miles on my car since I got it running and have noticed it is burning a decent amount of oil.

The story with the engine is I had it in my 95 and moved it to this 94 it is around 90k miles (stock longblock) and never burned any oil in my 95. When I had the motor out I had to have the heads off to remove a broken intake bolt so I had the machine shop rebuild the heads.

Anyhow I'm thinking they did a crappy job and one or many of the valve seals are bad. Is there anyway to check (while leaving the heads on) if my problem is rings or valve seals?

What size are the valve seals on GT40s? Any recommendations on some to get?

Right now I'm considering just installing new seals to give it a shot since they aren't too expensive.

I did check the PVC/screen and it is getting good vacuum and is clean/flows air.
 
G

GDTrumbo

Member
Jan 22, 2009
199
0
17
Nashville, TN
Jul 27, 2010
#2
  • Jul 27, 2010
  • #2
Do a compression test on it. Remember, a chain is only as strong as it's weakest link. Since you rebuilt the heads, the piston rings are now the weak link & may fail. I have seen a few engines drop the rings due to valve jobs in my time. Good luck....

GT
 
You must log in or register to reply here.

Similar threads

T
Oil burning on my recently buil 302
  • The blk67
  • May 15, 2026
  • Fox 5.0 Mustang Tech
Replies
3
Views
161
Fox 5.0 Mustang Tech May 15, 2026
Noobz347
J
'04 3.8L V6 mineral deposits and oil on #3 cylinder. Does it need a rebuild or something simpler?
  • joeybuddy96
  • Mar 18, 2026
  • SN95 V6 Mustang Tech
Replies
7
Views
298
SN95 V6 Mustang Tech Jul 24, 2026
gkomo
O
8.8 Pinion Nut Leak
  • OX1
  • Jan 3, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
15
Views
823
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jan 5, 2026
OX1
O
O
Sooty/Oily Front Engine & Pulleys
  • ozenator
  • Jun 15, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
12
Views
298
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jun 22, 2026
Blackhawkxx
D
Question about EGR valve, replacement, and a part on the valve.
  • DPP
  • May 9, 2026
  • SN95 V6 Mustang Tech
Replies
1
Views
137
SN95 V6 Mustang Tech May 23, 2026
DPP
D
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 1994 - 1995 Specific 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?