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Caravan/Voyager Engine Problems

92 messages,  Last post on Nov 21, 2009 at 7:42 AM

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What is this discussion about? Dodge Caravan, Chrysler Voyager, Plymouth Voyager, Engine, Van

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#24 of 92 Re: To Shipo. About remanufactured transmission from Chrysler [lovecd] by shipo Oct 14, 2007 (6:41 am)
Replying to: lovecd (Oct 13, 2007 11:06 pm) One, question. Does the noise coincide with a drop in RPMs on the tachometer?   As far as I know, all Gen 3 and Gen 4 minivans with 3.3 and 3.8 liter engines go into torque converter lock between 35 and 45 mph (warmed up and under light throttle load), and when that happens it isn't unusual to hear some resonance from the exhaust system.   In the case of both of our vans, assuming a light application of the accelerator pedal when on a level road, the engine RPMs will drop from ~2000 to ~1500 when in the 38 to 45 mph range. Occasionally, depending upon loading and such I'll hear some engine and exhaust resonance.   A good way to rule this out is to take a test drive and manually select "3" with the gear selector for all speeds under 50. If you do this and you hear your "noise" then it's a fair assumption that the problem is simple resonance.   Best Regards, Shipo Replies to this message: lovecd (Oct 14, 2007 7:45 am) shipo (Oct 14, 2007 8:58 am)
#25 of 92 Re: To Shipo. About remanufactured transmission from Chrysler [shipo] by lovecd Oct 14, 2007 (7:45 am)
Replying to: shipo (Oct 14, 2007 6:41 am) Thanks for your advise! I will do this test later on. By the way, if it is resonance, will that goes away after driving few thousands mile (break-in period) or will stay forever? It is kind of annoying to me. Replies to this message: shipo (Oct 14, 2007 8:58 am)
#26 of 92 Re: To Shipo. About remanufactured transmission from Chrysler [lovecd] by shipo Oct 14, 2007 (8:58 am)
Replying to: lovecd (Oct 14, 2007 7:45 am) If it's resonance, then it probably won't go away as the problem isn't the transmission. What is happening is that when the torque converter locks up, the engine RPMs drop to a point where the engine is almost lugging, and that in turn sets up a vibration through the exhaust system and other components attached to the engine.   Typically resonance isn't a problem, however, if the exhaust system has been damaged at some time in the past, and/or one or more of the exhaust hangers is missing/damaged, the problem can manifest itself as a noise or even an amplified vibration.   Keep us posted.   Best Regards, Shipo
#27 of 92 Re: engine rattle [goldrench] by goldrench Oct 15, 2007 (4:46 am)
Replying to: goldrench (Aug 18, 2007 3:29 am) Has anyone else seen/heard this problem? I sure could use some help here. Replies to this message: shipo (Oct 15, 2007 5:25 am) toadrn (Nov 05, 2007 8:01 am)
#28 of 92 Re: engine rattle [goldrench] by shipo Oct 15, 2007 (5:25 am)
Replying to: goldrench (Oct 15, 2007 4:46 am) I'm thinking probably not as there haven't been any responses to your original query.   Grasping at straws here, you might want to consider buying a premium belt from Napa/Gates, Mopar or Dayco (and by "premium" I mean the best of whatever they sell, usually costing somewhere north of $40 for the belt), as cheap belts have a tendency to slip a bit causing a ringing or chirping sound.   Best Regards, Shipo
#29 of 92 rattler by goldrench Oct 15, 2007 (5:38 am)
Thanks...we've changed the belts to premium with no change. Only happens when warm, and it's definately a metal rattle. Replies to this message: shipo (Oct 15, 2007 5:41 am) bobshep (Jan 15, 2008 7:53 am) shipo (Jan 15, 2008 7:58 am) and 3 more...
#30 of 92 Re: rattler [goldrench] by shipo Oct 15, 2007 (5:41 am)
Replying to: goldrench (Oct 15, 2007 5:38 am) I find it highly unlikely that it is the timing chain as they are quite robust. I know of a couple of instances where the factory chain and gear set lasted over 300,000 miles with no problems or noise.   Best Regards, Shipo Replies to this message: bobshep (Jan 15, 2008 7:53 am) shipo (Jan 15, 2008 7:58 am) bobshep (Jan 15, 2008 8:02 am) and 2 more...
#31 of 92 rattler2 by goldrench Oct 15, 2007 (5:57 am)
Ok...thanks again...we'll do further testing and I'll let you know.
#32 of 92 2006 Caravan whirring noise by pjeanneb Oct 16, 2007 (9:03 am)
My '06 Grand Caravan makes a whirring kind of whining noise. It changes pitch when gears shift and I can hear it on the highway, around town as well as when idling. It happens when engine is warm but outside temp is cool. Dealer said he has 2 that do this and it has something to do with battery re-charging. My reliable mechanic has agreed. No one has offered a solution to this very annoying situation. This is my 3rd Caravan and I am ready to drive it into a tree to get the noise to quit. Any suggestions? Replies to this message: pjeanneb (Dec 04, 2007 4:57 am)
#33 of 92 Re: engine rattle [goldrench] by toadrn Nov 05, 2007 (8:01 am)
Replying to: goldrench (Oct 15, 2007 4:46 am) I have a 2005 Grand Caravan, and I have the same problem. A horrible rattling noise. It started at about 48,000 miles. The first time that I took it in to the dealer I was told it was the harmonic balancer, and it would cost me 250.00 to replace it. I was assured that the noise would then be gone....only it was not. When I took it back again they told me that the noise was normal by Dodge standards. I took it to another dealership, and was told that the noise is an internal engine noise....is not normal, but ok per dodge standards. I am still fighting with dodge to attempt to get the new engine that I am entitled under my warranty. I am taking it to another shop this week.....can't wait to hear what they have to say.

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