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  • SN95 4.6L Mustang Tech

Engine Blue Smoke when leaving stop, help diagnose

  • Thread starter Thread starter Erik98
  • Start date Start date Sep 11, 2022
E

Erik98

Member
May 16, 2021
2
1
13
California
Sep 11, 2022
#1
  • Sep 11, 2022
  • #1
First time I’ve ever replied hopefully I did it correctly and no one gets upset. Anyways I have an 03 Gt, I’ve had this issue for I’d say 2 weeks. It happened after I installing the clutch, took me about a 2 weeks to get it done. That being said it was sitting for 2 weeks straight so maybe that’s why, I tested compression everything looked great. I replaced pcv and installed a oil catch can, to see if that would fix the issue hoping it isn’t valve seals. Oil level has stayed the same, I tried doing a synthetic bled. Now I’m confused because wouldn’t compression mean rings, and valve would cause oil consumption? If it’s not those two why does my car throw a could of blue smoke after accelerating from a stop. I’m getting ready to install cams/springs/ rockers, and valve seals. But if anyone has any other idea of what may be the issue I much rather wait than to just toss money at it.
 
Reactions: Thomas Hodges

Potomus Pete

I'm still waiting for the fully nude shots
5 Year Member
Mar 7, 2019
3,308
1,223
153
Sarasota Florida
Sep 11, 2022
#2
  • Sep 11, 2022
  • #2
It could be the blend. High mileage engine may be burning more with synthetic. I would run it for a week or so. Then go back to slightly thicker dino oil. It's not always recommended, but I use STP oil treatment in my 302.
 
F

Floydian100

Member
Dec 17, 2022
13
1
13
Maryland
Jan 4, 2023
#3
  • Jan 4, 2023
  • #3
I always run conventional oil in older vehicles, helps with oil pressure to.
 
D

Deleted member 38176

Jan 4, 2023
#4
  • Jan 4, 2023
  • #4
Valve seals
 
E

EricBitt

New Member
Jan 4, 2023
4
0
1
Phoenix
Jan 5, 2023
#5
  • Jan 5, 2023
  • #5
there are many reasons, damaged piston rings, or worn cylinder walls. Time to have a qualified technician check things out.
 
D

Deleted member 38176

Jan 5, 2023
#6
  • Jan 5, 2023
  • #6
EricBitt said:
there are many reasons, damaged piston rings, or worn cylinder walls. Time to have a qualified technician check things out.
Click to expand...

Qualified technician here.....its the valve seals
 
S

Shuttleman83

Active Member
Jun 30, 2019
239
13
28
USA
Jan 22, 2023
#7
  • Jan 22, 2023
  • #7
Seals for sure, but they seem to do this 150k and above. Also, running rich and catless will intensify this.
 
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