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

Scratched Up Piston

  • Thread starter Thread starter TorchRed_4.0
  • Start date Start date May 7, 2021
  • Tags Tags
    cylinder head foxbody help piston

TorchRed_4.0

Member
Mar 2, 2019
67
2
8
Georgia
May 7, 2021
#1
  • May 7, 2021
  • #1
Finally pulled the heads off to address my oil burning issue and piston #8 looks like this. Need a new piston or can this one be fixed?

 

7991LXnSHO

wanna catch the space herp
10 Year Member
Sep 1, 2010
7,387
2,745
194
Kearney, NE
May 7, 2021
#2
  • May 7, 2021
  • #2
What was loose in there? How do the head and valves look? If the bore is scored from the shrapnel that did this, you will need more than a new piston and three rings.
(I am putting money on a loose spark plug electrode.)
 

TorchRed_4.0

Member
Mar 2, 2019
67
2
8
Georgia
May 7, 2021
#3
  • May 7, 2021
  • #3
7991LXnSHO said:
What was loose in there? How do the head and valves look? If the bore is scored from the shrapnel that did this, you will need more than a new piston and three rings.
(I am putting money on a loose spark plug electrode.)
Click to expand...
Dude I found a damn valve guide in there LOL previous owner was on something.
 
Reactions: 7991LXnSHO

TorchRed_4.0

Member
Mar 2, 2019
67
2
8
Georgia
May 7, 2021
#4
  • May 7, 2021
  • #4
7991LXnSHO said:
What was loose in there? How do the head and valves look? If the bore is scored from the shrapnel that did this, you will need more than a new piston and three rings.
(I am putting money on a loose spark plug electrode.)
Click to expand...
Also the valves on cylinder 8 are totally black from oil the car has been burning since I got it.
 

Ryuk

I love your drawers
5 Year Member
Apr 22, 2017
1,680
1,599
133
May 7, 2021
#5
  • May 7, 2021
  • #5
I'd bet the bore is scratched up pretty good too.
 
M

Monkeybutt2000

Mustang Master
Aug 11, 2019
1,387
849
133
Lafayette,IN
May 7, 2021
#6
  • May 7, 2021
  • #6
What does the cylinder look like?
 

nickyb

I gotta say i never painted my nuts, Never Ever
15 Year Member
Apr 3, 2009
2,972
1,618
153
nevada
May 7, 2021
#7
  • May 7, 2021
  • #7
Awww
 

7991LXnSHO

wanna catch the space herp
10 Year Member
Sep 1, 2010
7,387
2,745
194
Kearney, NE
May 7, 2021
#8
  • May 7, 2021
  • #8
TorchRed_4.0 said:
Also the valves on cylinder 8 are totally black from oil the car has been burning since I got it.
Click to expand...
If it had aluminum heads, they would need at least touch up. I’m curious to see how cast iron did against the valve guide. IMO a cast or hyper piston that looks like that is waiting to blow chunks.
 

HemiRick

I'd be looking at jacking under the house
Jun 28, 2020
723
272
73
Memphis TN
May 7, 2021
#9
  • May 7, 2021
  • #9
When I had my heads off last piston 8 was all marked up from some small piece of metal, I smoothed the worst of it....the cyl still seals fine and doesn't burn oil. With yours burning oil and dark exhaust valve it needs attention.
 

General karthief

wonder how much it would cost to ship you a pair
5 Year Member
Aug 25, 2016
27,845
10,522
203
polk county florida
May 7, 2021
#10
  • May 7, 2021
  • #10
I'm willing to bet that piston has some hair line fractures and needs to be repurposed as an ash tray
JMO
 

nickyb

I gotta say i never painted my nuts, Never Ever
15 Year Member
Apr 3, 2009
2,972
1,618
153
nevada
May 8, 2021
#11
  • May 8, 2021
  • #11
General that would be an asstray
 

General karthief

wonder how much it would cost to ship you a pair
5 Year Member
Aug 25, 2016
27,845
10,522
203
polk county florida
May 8, 2021
#12
  • May 8, 2021
  • #12
nickyb said:
General that would be an asstray
Click to expand...
And just what are you trying to say there Nick?
 

nickyb

I gotta say i never painted my nuts, Never Ever
15 Year Member
Apr 3, 2009
2,972
1,618
153
nevada
May 8, 2021
#13
  • May 8, 2021
  • #13
The previous owner who dropped the guide in there was an ASS, and now all that piston is good for is a Tray, hence AssTray...
 

2000xp8

SN Certified Technician
Aug 8, 2003
8,016
1,613
194
NJ
May 8, 2021
#14
  • May 8, 2021
  • #14
I would not put this engine back together without a complete overhaul.
Burning oil, dropping valve's, piston damage combined with a questionable previous owner makes anything other than a complete rebuild a gamble. That is how cars get left to rot. You do a bunch of labor to fix something, then it's not right again and motivation is gone to do it again.
The heads should also get a valve job and repair.
 
M

Monkeybutt2000

Mustang Master
Aug 11, 2019
1,387
849
133
Lafayette,IN
May 8, 2021
#15
  • May 8, 2021
  • #15
I'd grab a JY Exploder engine.
 
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