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

did too much crankcase pressure blow my motor up?

  • Thread starter Thread starter 94gts
  • Start date Start date Nov 14, 2006

94gts

Member
Jul 4, 2004
873
0
16
Carmel, New York
Nov 14, 2006
#1
  • Nov 14, 2006
  • #1
this may be hard to answer, but im wondering if poor crankcase venting led to my problems.....

right now under wot, my car blows massive clouds of oil out the tailpipes. oil also shoots out of the breather, dipstick, rear main, etc. i know it has bad rings on the 1 and 2 cylinder.

now, i am wondering if the bad rings came from all the nitrous i USED to have or from the way my crankcase release is set up.

i ran an untuned converted carb kit 150 wet shot (unsafe, YES!) for a year and a half with no problems. this was from like 90k-110k. this was with iron gt40's and a stock cam. the intake was an explorer piece with a BIG baffle. At 114k i did twisted wedge heads and a fti cam. the intake is an perfomer rpm with a tiny baffle. everything was fine for 1k (until 115k) until my current problems started.

with my iron gt40's were set up with pcv and a breather on the oil fill neck with NO vaccum on the filler neck. when i did the tw's i kept pcv but i had to switch my valve covers (due to my 75mm tb), so now the breather is on the driver side. so 1k before my problems started i put the oil fill vc on the drivers side(not sure if that makes a difference?). it still has no vacuum to it.

so my question is, Is my crankcase release system set up to blame (or the new top end), or is it just a coincidence that the nitrous killed it after i put the new top end on?
 

94gts

Member
Jul 4, 2004
873
0
16
Carmel, New York
Nov 15, 2006
#2
  • Nov 15, 2006
  • #2
is this too much tech?
 

20new5.0

New Member
Sep 16, 2005
125
0
0
Camarillo, CA
Nov 15, 2006
#3
  • Nov 15, 2006
  • #3
I dont know if this helps, I was getting the exact same symtoms after installing my intake. Whenever I guned it smoke would blow out the back and oil would blow out of my dipstick. After tearing it all apart I found that when I put my intake on I forgot to install the PCV valve baffle and the PCv was sucking oil into the intake creating excess crankcase pressure. After installing the baffle, everything ran great.

You might want to check and see if the baffle is still in place and check to see if the PCV valve is good.
 
You must log in or register to reply here.

Similar threads

New Member with a 1992
  • Clutchfork
  • Oct 18, 2025
  • The Welcome Wagon
Replies
5
Views
309
The Welcome Wagon Oct 19, 2025
Clutchfork
Progress Thread Progress Thread- From6to8's 1994 Cobra Supercharger install
  • from6to8
  • Sep 25, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 20 21 22
Replies
420
Views
10K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- May 6, 2026
from6to8
Exceasive crankcase pressure
  • Driver460sz
  • Mar 30, 2023
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
25
Views
6K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Apr 3, 2023
manicmechanic007
3
Eight inches is enough for me...
  • 351MooseStang
  • Nov 27, 2025
  • 1974 - 1978 Mustang II Talk & Tech
Replies
5
Views
588
1974 - 1978 Mustang II Talk & Tech Mar 2, 2026
Bullitt347
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
931
1965 - 1973 Classic Mustangs -General/Talk- Jun 20, 2026
gray owl
G
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?