problem with an audi a5 3.0 tdi

Asked by 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


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.

Yes, explain in Spanish


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?


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.


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:


Looking for a Used A5 in your area?

CarGurus has 317 nationwide A5 listings starting at $9,450.

Postal Code:

Audi A5 Experts

  • #1
  • #2
  • #3
    Jorge Vazquez
View All

Find great deals from top-rated dealersTM


Related Models For Sale

Used Audi A4
55 Great Deals out of 1,023 listings starting at $2,495
Used Audi S5
20 Great Deals out of 136 listings starting at $12,900
Used Audi A6
15 Great Deals out of 256 listings starting at $1,950
Used BMW 3 Series
123 Great Deals out of 2,544 listings starting at $2,985
Used Audi Q5
57 Great Deals out of 1,034 listings starting at $8,990
Used Mercedes-Benz C-Class
67 Great Deals out of 1,689 listings starting at $3,300
Used Mercedes-Benz E-Class
53 Great Deals out of 824 listings starting at $4,415
Used BMW 5 Series
29 Great Deals out of 716 listings starting at $2,999
Used Ford Mustang
53 Great Deals out of 1,784 listings starting at $3,995
Used Audi S4
11 Great Deals out of 157 listings starting at $6,490
Used Audi A3
28 Great Deals out of 370 listings starting at $2,850

Used Cars for Sale

2019 Audi A5 For Sale
44 listings starting at $45,995
2018 Audi A5 For Sale
32 listings starting at $38,999
2017 Audi A5 For Sale
6 listings starting at $32,995
2016 Audi A5 For Sale
33 listings starting at $23,988
2015 Audi A5 For Sale
5 Great Deals out of 73 listings starting at $13,995

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.