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302 oil consumption mystery

  • Thread starter Thread starter Austin5.0
  • Start date Start date Sep 27, 2020
A

Austin5.0

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North Carolina
Sep 27, 2020
#1
  • Sep 27, 2020
  • #1
I have a 1988 mustang that I just put a used bottom end in. I put gt40p heads along with a f303 cam and edelbrock performer rpm intake. Its been using a quart of oil every 150 miles. the oil is burning only on cylinder 6. I put new valve seals in and it still didn't fix the problem. Compression is 140 (cold) across the board. just changed the pcv valve out, and it changed nothing. oil puddles up in cylinder 6. smokes only when it gets into higher revs.
 

General karthief

wonder how much it would cost to ship you a pair
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Sep 27, 2020
#2
  • Sep 27, 2020
  • #2
Worn valve guides?
 
A

Austin5.0

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Sep 27, 2020
#3
  • Sep 27, 2020
  • #3
Could be. Thats about the only thing i could think of.
 
A

Austin5.0

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Sep 28, 2020
#4
  • Sep 28, 2020
  • #4
Do gt40p heads have pressed in valve guides?
 

Dan02gt

mazing how much gas smell came from that tiny hole
20+ Year Stangneter
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Greenville, NC
Sep 29, 2020
#5
  • Sep 29, 2020
  • #5
You sure it's not sucking oil through the PVC? It's a common problem with some intakes. In fact Ford revised the baffle to address the issue for the Explorers.
 
Reactions: 7991LXnSHO

Wayne Waldrep

Before I post a pic, do you have one of yours?
20+ Year Stangneter
Apr 14, 2003
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Cuba, AL
Oct 2, 2020
#6
  • Oct 2, 2020
  • #6
Dan02gt said:
You sure it's not sucking oil through the PVC? It's a common problem with some intakes. In fact Ford revised the baffle to address the issue for the Explorers.
Click to expand...
And unfortunately stopped making the large better baffle!
 

nickyb

I gotta say i never painted my nuts, Never Ever
15 Year Member
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nevada
Oct 3, 2020
#7
  • Oct 3, 2020
  • #7
If it is your pcv valve ,this guy on utube makes a catch can ,looks simple enough.let us know what you find
 

Foxslider

im not that much of a idiot
Oct 25, 2019
543
156
53
Houston, TX
Oct 3, 2020
#8
  • Oct 3, 2020
  • #8
I burn a qt a night if i go out for a drift session. Lol.
 
J

junkyardwarrior

Well-Known Member
Jan 10, 2011
400
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Oct 5, 2020
#9
  • Oct 5, 2020
  • #9
oil rings? Compression and leakdown test won't indicate worn oil rings
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
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Massachusetts
Oct 5, 2020
#10
  • Oct 5, 2020
  • #10
Wayne Waldrep said:
And unfortunately stopped making the large better baffle!
Click to expand...

Yup. Was a common issue so much so that Ford did change the baffle design. It's part number F6TZ-6L678-AA but it's been discontinued for a while.



Try a separator on the PCV to see if that is the cause of your consumption
 
Reactions: 7991LXnSHO

7991LXnSHO

wanna catch the space herp
10 Year Member
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Oct 5, 2020
#11
  • Oct 5, 2020
  • #11
Is this also an issue on the Exploder intakes? If so, is there a part number for that bigger baffle?

Mustang5L5 said:
Yup. Was a common issue so much so that Ford did change the baffle design. It's part number F6TZ-6L678-AA but it's been discontinued for a while.



Try a separator on the PCV to see if that is the cause of your consumption
Click to expand...
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
27,923
10,569
203
polk county florida
Oct 5, 2020
#12
  • Oct 5, 2020
  • #12
I have several lower intakes lay'n about, let me do some comparing tomorrow.
 
Reactions: 7991LXnSHO
M

Monkeybutt2000

Mustang Master
Aug 11, 2019
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Lafayette,IN
Oct 5, 2020
#13
  • Oct 5, 2020
  • #13
You're burning a quart every 150 miles? The smoke trail must be insane
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,254
17,937
224
Massachusetts
Oct 5, 2020
#14
  • Oct 5, 2020
  • #14
7991LXnSHO said:
Is this also an issue on the Exploder intakes? If so, is there a part number for that bigger baffle?
Click to expand...

the explorer intakes already have the new baffle. Ford started adding them in 96 on the explorer, but not the kit intakes.

My 93 cobra lower, bought around 2000 or so, has the small baffle. The 96 explorer lower i ported and installed in its place has the big baffle
 
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A

Austin5.0

New Member
Mar 2, 2020
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1
North Carolina
Apr 25, 2021
#15
  • Apr 25, 2021
  • #15
Dan02gt said:
You sure it's not sucking oil through the PVC? It's a common problem with some intakes. In fact Ford revised the baffle to address the issue for the Explorers.
Click to expand...
Would it sucking oil in from the pcv be only on cylinder 6? I have new guides put in and new seals still burning oil.
 
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