problem with an audi a5 3.0 tdi

Asked by Pedro Apr 29, 2018 at 08:37 AM about the 2008 Audi A5 quattro Coupe AWD

Question type: Maintenance & Repair

good afternoon, I'm from portugal and I'm using the translator may have some
mistranslated words
  I have a problem with an audi a5 3.0 tdi
I bought an audi a5 3.0 tdi but the car did not pick up, I measured the
compression ratio of the engine and it gave different in all the cylinders, in a
cylinder even to zero, I started to disassemble and I noticed that there are
marks on the piston of the valves to have touched the piston so there may be
the hypothesis of having valves empenadas, I think they mounted the
distribution out of point and tried for the car to work and I do not know if for
having tried for the car to work with the distribution out of point if it affected
the cames or only affects the valves, does anyone know what can be treated?

6 Answers

26,290

What you are describing is a complex problem. I can explain in Spanish if you prefer, it is closer to Portuguese.

1 people found this helpful.
26,290

Si el distribuidor de electricidad fue montado mal, el motor funciono fuera de tiempo y si continuo asi por kilometros, las valvulas se doblaron. La desigualdad en compresion entre los cilindros indica que, las valvulas de admision como las de escape, no se asientan correctamente. Usted dice que ha empezado a desarmar el motor, mi recomendacion, por experiencia personal, es que haga una reparacion completa de las valvulas para evitarse mayores porblemas. Inspeccione bien los pistones y fijese que todos los anillos de compresion esten bien, si no es asi, vale la pena reponerlos ahora. Espero esto le sirva de alguna ayuda.

¿existe la probabilidad de que las cames estén dañadas por haber puesto el motor fuera de punto?

26,290

Pedro, si te refieres a los vastagos (levas) que mueven las valvulas, es posible que no esten dañados. Si el motor funciono por tiempo o muchos kilometros con las valvulas despues que se doblaron, puede haber dañado el (los) arbol de levas (cames o camshafts en ingles) debido al continuo golpeo contra las levas al tratar estas de mover las valvulas.

26,290

Pedro, hable hoy con mi amigo que es supervisor de mecanica en la agencia VW-Audi local y me dice que si los cames (camshafts) no estan doblados, no es necesario cambiarlos; con un papel de lija suave se debe limar los puntos donde hacen contacto con las valvulas y funcionaran bien.

Your Answer:

A5

Looking for a Used A5 in your area?

CarGurus has 181 nationwide A5 listings starting at $6,977.

Postal Code:

CarGurus Experts

  • #1
    Guru9TWSF
    Reputation
    2,210
  • #2
    AudiGuruJP
    Reputation
    1,540
  • #3
    Sha Kidd
    Reputation
    940
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Audi A4
38 Great Deals out of 696 listings starting at $4,750
Used Audi S5
4 Great Deals out of 126 listings starting at $11,995
Used Audi A6
4 Great Deals out of 118 listings starting at $3,950
Used Audi Q5
59 Great Deals out of 2,205 listings starting at $4,995
Used BMW 3 Series
71 Great Deals out of 1,168 listings starting at $1,795
Used Mercedes-Benz C-Class
98 Great Deals out of 1,450 listings starting at $3,799
Used Audi A3
21 Great Deals out of 421 listings starting at $3,977
Used BMW 5 Series
18 Great Deals out of 323 listings starting at $4,500
Used Ford Mustang
65 Great Deals out of 1,258 listings starting at $4,995
Used Audi A8
3 Great Deals out of 31 listings starting at $15,990

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. Content will be removed if CarGurus becomes aware that it violates our policies.