Question about 2001 Chrysler Sebring

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Replaced a timing belt and car wont start.

2.4l DOHC. A friends timing belt broke and I replaced the belt and water pump. Lined everything up as per maint. manuel and turned it by hand 2x. Felt smooth and the marks seemed to Line up. Car wont start. Checked for spark. Good. Smell fuel so I feel that its getting gas. Wants to fire but wont. Double checked timing marks and they look good to me. Any Ideas???

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  • krlok Apr 01, 2014

    The belt was broken. Its a friends car and I offered to help. I pulled the valve cover while setting the belt to confirm the #1 valves were closed and they were. I lined up the timing mark on the crank pulley with the mark on the block, I assumed that was TDC but did not confitm it by pulling the plug to check. the only electrical plugs removed where the coil pack connector (no distributer) and the water temp. connector. I checked compression and #1 is 60 lbs, #2-75, #3-50, and #4-45. Done dry and cold since I couldn't start it, but if I had bent valves I dont think I'd get anything would I? I was hoping that maybe something just needed to be reset something. I read something about when a belt brakes you need to "reflash" but had never heard of that before. Also I checked for codes and I got a P0340- Cam position sensor. I cleared the code and I't didn't come back but again I couldn't start it so not sure if that makes a difference (asumming probably). I guess I have to tear it down again. What do you mean by counting the teeth? Each cam gear has two marks opposed 180 degrees and on one of the spokes its marked with arrows and says "up". I used a straight edge to line up all four marks while setting the belt. After giving tension I ran it around by hand and checked all four marks with a straight edge again and they all lined up. Dont want to have to tear it down again. Can you explain how I can count the teeth?

  • Casey Rodriguez
    Casey Rodriguez Apr 01, 2014

    I should have been more clear, I'm referring to the teeth of the belt. The compression is low enough it won't start. Below 120 it'll struggle, it should be 150 dry. Bent valves can result in varying compression returns. If it was broken, it's possible the valves were struck, and it only takes one valve to compromise it's ability to hold compression. I just read that the valves clear the pistons on 2.4l engines, but the valves can interfere with each other if the cams move independently. Valves are easier then you think to replace, you only need a valve compressor, some lapping compound, and a lapping tool. You can look up how to lap valves, and replace the valves yourself. I did it on my sentra successfully on my first try.

  • krlok Apr 01, 2014

    Yes, from my understanding, valve to piston is non-interferance and valve to valve is interferance. I've replaced valves before.I'm trying to avoid pullin the head but if I must, I will.
    I still dont quite understand how you count the teeth. Belt or gear. Whats your reference point? Count the ribs from where to where?May I ask, and please don't take offense. Whats your background? Are you a Dodge, Chrysler Mechanic?

  • Casey Rodriguez
    Casey Rodriguez Apr 01, 2014

    Most chiton manuals will give you a rib count in between exhaust cam and crank pulley as well as intake cam to crank pulley. They use it to confirm it's position, it's not likely the issue though. I have only worked on older dodges and chryslers, and no I'm not certified. I've just been fixing anything and everything since I was in middle school.

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Sometimes it's wise to count the teeth to make sure you're right on. Usually if the timing is a little off it'll still ignite fuel a little and pop. If it ran prior to doing the work, you may have forgotten to plug something back in, I do it quite often. If the timing belt broke, it may have bent valves. If you're smelling fuel, it's unlikely it's being ignited. I'd check compression just in case, and make sure you're not 180deg off. If you're going to remove the belt again, check the #1 piston is all the wAy up, check to make sure the distributor rotor is pointing to #1, and check to make sure cyl #1s valves are closed.

Posted on Mar 31, 2014

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