Answers

• zaken1 09/03/11 1:03 am PST

  Edit Answer (for another 7 minutes) Your description is a perfect example of what an engine sounds like when the timing chain has broken or jumped out of position. This often will not set a trouble code. Time for a new timing set; which on the 4.7 SOHC engine contains 3 different timing chains, 2 guides, 3 tensioners, and 2 timing arms. The deluxe timing set for the sport engine also contains 2 cam sprockets; a crank sprocket, and an idler sprocket. I don't have enough information to be able to make an intelligent comment about the marks on the secondary chains. But if you ran a cylinder compression test, and found that the compression is less than 110 psi; this would prove that there is a problem in the timing drive. It might be a sheared woodruff key, or maybe there is something about the marks on the chains which is critical. A problem in the crank or cam position sensors would not make the motor crank as if there was no compression; and if there was low or no compression in a compression test; it could not possibly have anything to do with sensor problems. Source:  (0)(0) Report It

• steve_ 09/03/11 8:33 pm PST

  Edit Answer (for another -22 minute) You can reply in this thread by clicking the Answer this Question button and that will help keep all the information in one spot. Thanks! (0)(0) Report It

• zaken1 09/03/11 9:04 pm PST

  Edit Answer (for another 9 minutes) If you tried to open a new question to post a response; it will not be able to be seen here. Please click the "answer this question" button under THIS response, and post the information here. Then click the "submit answer" button. (0)(0) Report It

• turboford928 09/08/11 5:13 pm PST

  Edit Answer (for another -43 minute) new timing chain on and in time! but still same thing could i have an oil pressure problem ie: bad oil pump, bad sending unit, excessive sludge on pump pick up as dodge 4.7 is known for that even with regular oil changes. (0)(0) Report It

• turboford928 09/08/11 5:38 pm PST

  Edit Answer (for another -18 minute) oh and by the way this is why i dont like newer cars with overhead cam engines!!! just give me an old school V-8 any day!! thanks for the help! (0)(0) Report It

• zaken1 09/08/11 10:51 pm PST

  Edit Answer (for another -5 minute) If you just ran a compression test, and posted the pressures you got; we would know a lot more about what is going on here. Why muddle around in speculation and theories; when tests can be done so easily? (0)(0) Report It

• zaken1 09/12/11 4:42 am PST

  Edit Answer (for another -14 minute) There is one other thing that can make the motor have no compression; and that would be if a camshaft broke. I would strongly recommend pulling the valve covers and cranking the motor; while watching to see if the valves are being opened and closed in all the cylinders. I would also independently confirm by inserting a rod in the spark plug opening of # 1 cylinder that the piston in # 1 cylinder is actually at TDC when the timing marks on the crank pulley say it is. Sometimes the damper in a crank pulley comes loose and the marks move to a different position. (0)(0) Report It