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02-05-2008, 01:16 PM | #1 | |
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It's like Magic
RE: 99 Avalon 3.0 V6 w/83k miles
When I turned off the car, the engine stopped with a little shudder. Has been doing that for a long time. After replacing timing belt, idler pulleys and water pump, engine shudder disappeared. When I turn off the ignition, engine now dies smoothly and quietly. Can anyone explain this? |
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02-07-2008, 06:38 AM | #2 | ||
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Re: It's like Magic
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I just spent an hour reading Google info on timing belt stretch. Very controversial with some saying timing belts ABSOLUTELY DO NOT stretch while others say they do stretch enough to retard timing and affect engine performance. One person actually said Toyota had a history of timing belt stretch problems but did not give any reference to back-up his claim. Since I did not check timing before, I can not prove anything; but, I'm convinced that the new timing belt noticeably improved engine performance, for whatever reason. |
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02-07-2008, 02:51 PM | #3 | |
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Re: It's like Magic
Timing is a critical element in a smooth running engine. It insures the valves open and close in sync with the rise and fail of the pistons. If the timing is slightly off, fuel can be exploding within a cylinder and/or the exhaust not quite expelled, as you shut down. These forces are pushing on heavy pistons and cranshafts. The momentum of this weight moving at shut down creates your shudder. Here's a little back ground info: http://www.carbibles.com/fuel_engine_bible.html There are 3 pages.
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**We took the time to answer your post. Please give us some time and post the fix. It will help hundreds. **Follow prescribed safety practices before attempting any procedures. Doubts? Consult a maintenance manual. 07 Fusion / 06 RAV4 / 06 Accord / 96 Gr Caravan |
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02-07-2008, 03:12 PM | #4 | ||
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Re: It's like Magic
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