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All four cylinders have zero compression

Tiny
MIKETKACH
  • MEMBER
  • 2004 VOLVO V40
  • 1.8L
  • 4 CYL
  • TURBO
  • 2WD
  • AUTOMATIC
  • 142,000 MILES
Our Volvo quit running. In trying to diagnose we discovered that all four cylinders have zero compression. The timing belt is in place and turning when starter is operated. When you turn the crank over with a wrench it stops and doesn't want to turn freely even with the plugs taken out. It stops about 180 degrees either direction. With the starter it will crank through. My question is, what marks are supposed to align on timing gears and crank to confirm whether or not the timing belt has jumped teeth? The marks on gears that I see don't seem to align with marks on timing cover as I would suspect. I have a feeling belt may have jumped a few teeth and since it's an interference engine it may be damaged.
Thanks
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Monday, February 25th, 2019 AT 6:30 AM

9 Replies

Tiny
MIKETKACH
  • MEMBER
  • 19 POSTS
I don't think I can see an answer. I saw a general compression information sheet. What I need is the timing mark's and how to align everything.
Thanks
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Monday, February 25th, 2019 AT 9:18 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

I attached the marks for your engine for proper alignment of the cams and crank.

The engine has been damaged and the head will have to come off and the valves replaced. Once that is done then the new belt and associated parts can be installed correctly to get the car to run again.

Roy
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Tuesday, February 26th, 2019 AT 2:36 AM
Tiny
MIKETKACH
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  • 19 POSTS
Thanks a bunch. I suspected it was damaged. When you turn it over and check the alignment of the cam gears to the cover with notches in it they clearly are not aligned.
You guys are the best.
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Tuesday, February 26th, 2019 AT 6:53 AM
Tiny
MIKETKACH
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  • 19 POSTS
BTW. What would have caused this malfunction in the first place would you guess?
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Tuesday, February 26th, 2019 AT 6:55 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
The belt most likely jumped a few teeth.

Roy
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Tuesday, February 26th, 2019 AT 7:03 AM
Tiny
MIKETKACH
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  • 19 POSTS
Agreed, but something else must have also failed to make it jump right? It is probably not worth fixing sadly.
Thanks Roy
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Tuesday, February 26th, 2019 AT 7:06 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Age of the belt, tensioner failure or pulley failure would also be reasons.

Roy
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Tuesday, February 26th, 2019 AT 7:08 AM
Tiny
MIKETKACH
  • MEMBER
  • 19 POSTS
Yeah. Seems like a bad design when a belt falls and totally ruins the engine. Lol. Good for the mechanic I guess.
Much appreciated.
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Tuesday, February 26th, 2019 AT 7:10 AM
Tiny
ASEMASTER6371
  • MECHANIC
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You are welcome.

Always glad to help.

Roy
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Tuesday, February 26th, 2019 AT 8:03 AM

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