Engine Mechanical problem
2002 Dodge Caravan 6 cyl Two Wheel Drive Automatic 77000 miles
I have an '02 Dodge Grand Caravan 3.3L V6 with 77k miles on it. Bought it with 58k. Have only used synthetic oil since then & it has always run smoothly. Recently I went a bit long between changes (maybe 2k mi. Overdue) & it started to tick slightly. Now that I have changed the oil, it is ticking worse. Sounds like it's coming from the back of the engine (right bank?) And I can hear it better from underneath. I used a stethoscope (long piece of flexible tubing) to try locating the sound and can hear it loudest when the tube is over a freeze plug (but the water pump sounds fine). I put in oil additive (the thick stuff used to reduce smoking), but it's made no difference. It has never smoked and doesn't now, but I thought it might help with the tick. Oil level is correct on the dipstick. I have a P0420 code. Could it be a bad rocker or lifter and be misfiring and causing the sensor to pick it up in the exhaust? The tick is easy to hear at idle but can't be heard at high RPMs. It's practically impossible to hear from inside the vehicle. Power & mileage still seem OK.
Saturday, October 25th, 2008 AT 3:17 PM