All four cylinders have zero compression

2004 VOLVO V40
142,000 MILES • 1.8L • 4 CYL • TURBO • 2WD • AUTOMATIC
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MIKETKACH
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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
Feb 25, 2019 at 6:30 AM
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MIKETKACH
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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
Feb 25, 2019 at 9:18 PM
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ASEMASTER6371
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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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Feb 26, 2019 at 2:36 AM
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MIKETKACH
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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.
Feb 26, 2019 at 6:53 AM
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MIKETKACH
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BTW. What would have caused this malfunction in the first place would you guess?
Feb 26, 2019 at 6:55 AM
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ASEMASTER6371
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The belt most likely jumped a few teeth.

Roy
Feb 26, 2019 at 7:03 AM
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MIKETKACH
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Agreed, but something else must have also failed to make it jump right ? It is probably not worth fixing sadly.
Thanks Roy
Feb 26, 2019 at 7:06 AM
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ASEMASTER6371
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Age of the belt, tensioner failure or pulley failure would also be reasons.

Roy
Feb 26, 2019 at 7:08 AM
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MIKETKACH
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Yeah. Seems like a bad design when a belt falls and totally ruins the engine. Lol. Good for the mechanic I guess.
Much appreciated.
Feb 26, 2019 at 7:10 AM
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ASEMASTER6371
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You are welcome.

Always glad to help.

Roy
Feb 26, 2019 at 8:03 AM