THE CAR RAN FINE BUT THE TIMING CHAIN WAS MAKING...

  • Tiny
  • Anonymous
  • 2002 Saturn L200
  • 140,000 miles

The car ran fine but the timing chain was making a knocking sound from too much slack. So I replaced the timing chain. Now it runs rough and shows P0301 misfire cyl 1. I checked compression and it has zero compression on cyl 1. I didn't find any coolant in oil. Any help would be a big help.

Monday, April 8th, 2013 AT 1:50 AM

5 Answers

  • Tiny
  • saturntech9
  • Expert
  • 28,260 posts

How did it run before you replaced the timing chain?Was everything timed correctly when replacing the timing chain?

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Monday, April 8th, 2013 AT 4:01 AM
  • Tiny
  • chrisbad89m
  • Member

It ran fine before. I even tore it all back down and redid the timing to make sure it was right.

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Monday, April 8th, 2013 AT 11:32 AM
  • Tiny
  • saturntech9
  • Expert
  • 28,260 posts

Sounds like a valve issue if its timed correctly doesn't make sense that it ran fine before unless it bent some valves before the chain replacement. I have never had that happen to me from just replacing chain on those cars.

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Monday, April 8th, 2013 AT 2:01 PM
  • Tiny
  • chrisbad89m
  • Member

I took the valve cover off and cranked the motor over. All the valves seemed to be moving normally.

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Monday, April 8th, 2013 AT 10:02 PM
  • Tiny
  • saturntech9
  • Expert
  • 28,260 posts

You can use a cylinder leak down tester to see where the compression is going.

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Tuesday, April 9th, 2013 AT 3:03 AM

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