Grey smoke from exhaust

Tiny
MANUEL RENTERIA
  • MEMBER
  • 1985 CHEVROLET SILVERADO
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 89,000 MILES
How do I stop it? Plugs are fouling out.
Do you
have the same problem?
Yes
No
Sunday, October 6th, 2019 AT 3:50 PM

2 Replies

Tiny
94 TRANSAM
  • EXPERT
Hi and welcome.

Gray or white smoke is caused by burning oil. The 3 main causes are:

1: Worn out piston rings. (Rebuild motor)
2: Worn out valve guides. (Replace guides or whole head)
3: A cracked engine block.

Are all 8 plugs fouling out or are some okay?

Rich
Was this
answer
helpful?
Yes
No
Sunday, October 6th, 2019 AT 4:39 PM
Tiny
AL514
  • EXPERT
Are the plugs coming out wet when you check them? The engine could be running very rich, fouling out plugs. Especially considering how old the vehicle is.
Was this
answer
helpful?
Yes
No
Sunday, October 6th, 2019 AT 7:38 PM

Please login or register to post a reply.

Recommended Guides