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The BMW Range
5 Series
E34
E34 Gear Not Smooth
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<blockquote data-quote="Roberto" data-source="post: 468895" data-attributes="member: 8160"><p>Just read through your initial posts again. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>Its normal for a car to take longer to shift up gears when the engine and g/box is cold. This is to generate more heat, which will bring up the car to operating temperature quickly. However, something is indeed wrong when the distance involved/rpm involved in shifting gears in the morning gets longer and longer. How is your engine temperature? Is the car taking longer than normal to get to operating temp from cold? Has this been happening for the past 2 months? If that's the case, then the solution is fortunately very straightforward. Thermostat. Your thermostate is faulty, and is either open all the time or opening too quickly preventing the coolant in the block from heating up fully before being allowed to circulate through the radiator circuit to cool down. Thus, the gearbox delays gearshifts to generate more heat.</p><p></p><p>Start your car in the morning when cold and leave it at idle. Don't drive. Note the time. You should reach operating temp in less than 5 minutes that way. If its taking longer then you've got a problem with the thermostat.</p><p></p><p>The solution is dirt cheap and equally simple. Change the thermostat (and o ring and thermostat housing gasket too usually) to a new one right away. You can also change your water pump if you haven't done so in the past 2 years...these two items usually have identical lifespans. Your engine belts will also typically have the same lifespan as the water pump so you can change those out too if you like. Use only conti belts not that bando shit. All in all, a cheap and very useful fix that is also a thorough servicing of some of the car's key components so its not really a waste if this doesn't fix the problem.</p></blockquote><p></p>
[QUOTE="Roberto, post: 468895, member: 8160"] Just read through your initial posts again. :) Its normal for a car to take longer to shift up gears when the engine and g/box is cold. This is to generate more heat, which will bring up the car to operating temperature quickly. However, something is indeed wrong when the distance involved/rpm involved in shifting gears in the morning gets longer and longer. How is your engine temperature? Is the car taking longer than normal to get to operating temp from cold? Has this been happening for the past 2 months? If that's the case, then the solution is fortunately very straightforward. Thermostat. Your thermostate is faulty, and is either open all the time or opening too quickly preventing the coolant in the block from heating up fully before being allowed to circulate through the radiator circuit to cool down. Thus, the gearbox delays gearshifts to generate more heat. Start your car in the morning when cold and leave it at idle. Don't drive. Note the time. You should reach operating temp in less than 5 minutes that way. If its taking longer then you've got a problem with the thermostat. The solution is dirt cheap and equally simple. Change the thermostat (and o ring and thermostat housing gasket too usually) to a new one right away. You can also change your water pump if you haven't done so in the past 2 years...these two items usually have identical lifespans. Your engine belts will also typically have the same lifespan as the water pump so you can change those out too if you like. Use only conti belts not that bando shit. All in all, a cheap and very useful fix that is also a thorough servicing of some of the car's key components so its not really a waste if this doesn't fix the problem. [/QUOTE]
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