I have a 91 turbo and it is blowing smoke out of the exhaust. I think the rings are bad. Do any one know what the compression in lbs suppose to be in the cylinders?

20

Asked by Apr 20, 2014 at 10:02 PM about the 1991 Dodge Stealth 2 Dr R/T Turbo AWD Hatchback

Question type: Maintenance & Repair

10 Answers

122,635

What color smoke.? White is coolant. Blue is oil. And black is unburnt fuel.

20

Not white, its not the coolant, but its alot of oil on sparkplugs and they was just changed. They are black now and I dida compression check and its at 120 in two of the front cylinders 110 in the other. Havent checked the back yet. The smoke looks grey.

1 people found this helpful.
122,635

Your compression psi should be 120 psi to 160 psi. For a stock 8:1 compression ratio.

1 people found this helpful.
122,635

That's on the lower side of what it should be.

122,635

Sounds like oil. Add a little oil in cylinders and re do check. If numbers stay the same your rings are probably ok. If numbers rise then you do have a ring issue. I suspect valve guide seals. Just had to replace the ones in my 91 3000 gt for smoke issues.

122,635

If it was mine and the numbers stayed the same with the wet compression check I would pull the heads have valve guide seals installed and have the valves checked and re seated. Doing this should bring your psi numbers back up to the 160 range.

20

Ok thanks for the advice. So you think the seals in the heads might be bad if the compression stays the same?

1 people found this helpful.
122,635

If numbers stay the same typically mean that the rings are ok. And if they are ok that leads me to believe that the smoke is coming from the seals and that the low compression numbers is coming from the valves not seating properly due to carbon build up. Having the valves checked and reseated will cause the compression to come back up.

1 people found this helpful.
20

Thanks!!!!

35

I agree these motors are not known for bad rings.If the engine has super high miles they usually will spin a crank shaft bearing first. Check your seals and guides first.

Your Answer:

Stealth

Looking for a Used Stealth in your area?

CarGurus has 22 nationwide Stealth listings and the tools to find you a great deal.

ZIP:

Dodge Stealth Experts

  • #1
    Daniel Foster
    Reputation
    960
  • #2
    dandyoun
    Reputation
    640
  • #3
    TopShadeTree
    Reputation
    150
View All

Related Models For Sale

Used Mitsubishi 3000GT
71 listings starting at $4,000
Used Ford Mustang
266 Great Deals out of 37,717 listings starting at $1,350
Used Chevrolet Camaro
237 Great Deals out of 27,289 listings starting at $2,077
Used Dodge Viper
256 listings starting at $28,995
Used Mitsubishi Eclipse
22 Great Deals out of 859 listings starting at $1,350
Used Mitsubishi Lancer Evolution
10 Great Deals out of 446 listings starting at $9,995
Used Chevrolet Corvette
96 Great Deals out of 15,044 listings starting at $3,620
Used Nissan 300ZX
134 listings starting at $3,995
Used Acura Integra
83 listings starting at $2,495
Used Toyota Supra
60 listings
Used Toyota MR2
21 listings
Used BMW M3
23 Great Deals out of 1,488 listings starting at $6,399

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.