Question about 1999 Daewoo Nubira

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I just finished repairing the valves in a 1999 Daewoo Nubira after the cam belt broke. It now has new cam belt, pulleys, tensioners, head gasket, head bolts, and valves. I put it all back together and hooked up the battery and it started right up! Only problem is that it runs wide open all the time and won't idle. The throttle linkage is not stuck, and is sitting in the idle position against the idle speed screw. I can't find any sensor connection plugs that got missed, and my ODBII reader doesn't read that there are any indicated problems at all! Any ideas what I should try next?

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  • 40 Answers

Map sincer check that if shorted to low or high it will make it do that check your throttle return spring it may be broken or out of ajustment

Posted on Sep 08, 2010

  • mr_maint Sep 08, 2010

    devoncruse, thank you for your help... The throttle return spring is fine. What exactly is a MAPP sensor, and where is it located on the engine?

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Timing belt diagram daewoo nubira 1998


Here are the written instructions, i do not have the pictures, it is a very good set of instructions and clearly written.

Required tools:

13mm open end wrench 10mm shallow and deep socket 8mm socket long flathead screwdriver 17mm deep socket T50 torx socket 1/4", 3/8ths and 1/2" ratchets and extensions E10 inverted torx sockets 6mm Allen wrench 15mm open end wrench 7mm socket 12mm open end wrench 14mm socket 12mm socket 8mm, 9mm and 10mm Allen head sockets 19mm socket pry bar needle nose pliers

If you are doing this because your timing belt broke you will also need to buy a complete cylinder head, head gasket set, and both idler pulleys. ALL DAEWOO MODELS WILL BREAK THE INTAKE AND EXHAUST VALVES WHEN THE TIMING BELT BREAKS.

Start by removing the air cleaner assembly from the throttle body, remove the air filter and housing jack up the vehicle and remove the wheel, remove the plastic shielding in front of the accessory drive belt assembly, remove the accessory drive belt, place a jack with a block of wood on top underneath the engine oil pan remove the front engine mount, remove the crank shaft pulley ( the 4 Allen head bolts only not the 17mm bolt in the center.) remove the metal plate behind the engine mount bracket on the engine, remove the plastic timing belt cover 3 clips on top 2 10mm bolts on bottom. Rotate the engine until the #1 cyl. is at Top Dead Center on the compression stroke or line up the crankshaft timing mark with the mark on the inner timing belt cover ( notch in cover with notch in pulley) on the camshaft pulleys -- ( intake cam line up the line on the pulley with the line on the inner cover)( exhaust cam line up the arrow on the pulley with the arrow on the inner cover) loosen the 13mm bolt in the belt tensioner and using the Allen wrench rotate the tab until there is slack in the belt. Remove the belt. At this time I would recommend you replace the water pump, both plastic idler pulleys as they tend to overheat and lockup, and the belt tensioner. Make sure all your marks are lined up, you may need a helper to hold the Exhaust Cam in place as it tends to move during belt installation. Put the timing belt underneath the crankshaft pulley, install the belt leaving the intake cam for last and NO BELT SLACK on the right side between the crank and the exhaust cam. Once the belt is installed rotate the crankshaft over 2 revolutions and make sure is rotates freely, and your timing marks are aligned perfectly if not the engine will not run properly, tension the belt as needed. Installation is the same as removal.

Nov 15, 2011 | 1999 Daewoo Nubira

1 Answer

Hello emissionwiz it looks that you know about this vehicle. I just purchased a Daewoo Lanos 2001. They advised me that the timing belt broke and that the tension pulley broke. I went to a u pull yard and...


if the timming belt broke when the engine was running most of the time the valves get bent and leak (head off repair) you could check this once you have replaced the belt before you start remove rocker cover and check for gaps between cam lobe and valve bucket when lobe is not pushing bucket down if there is a gap valve is bent.
these vehicles came out with a single cam or twin cam engine also so which one have you got?
valves bent on both engines when belt broke while running

on single cam engines you lock the tensioner with pin and loosen water pump and turn to obtain correct belt tension then release lock pin in tensioner and check that marks on tensioner align up if not turn water pump to get correct. some times this then causes the seal on the water pump to fail if its been there for some time because they corrode in block and its only a "O" ring so you might need a waterpump and "O" ring and coolant use grease on waterpump and "O" ring to make sealing and turning if needed eazier.

ifyou need any more info let me know even if twin cam can send pics also

Feb 15, 2011 | 2001 Daewoo Lanos

1 Answer

How to set Timing


To set the timing on your 2001 Daewoo Nubira, follow these instructions:

You will need these tools:

13mm open end wrench 10mm shallow and deep socket 8mm socket long flathead screwdriver 17mm deep socket T50 torx socket 1/4", 3/8ths and 1/2" ratchets and extensions E10 inverted torx sockets 6mm Allen wrench 15mm open end wrench 7mm socket 12mm open end wrench 14mm socket 12mm socket 8mm, 9mm and 10mm Allen head sockets 19mm socket pry bar needle nose pliers.

If you are doing this because your timing belt broke, you will also need to buy a complete cylinder head, head gasket set, and both idler pulleys. ALL DAEWOO MODELS WILL BREAK THE INTAKE AND EXHAUST VALVES WHEN THE TIMING BELT BREAKS.
Start by removing the air cleaner assembly from the throttle body, remove the air filter and housing jack up the vehicle and remove the wheel, remove the plastic shielding in front of the accessory drive belt assembly, remove the accessory drive belt, place a jack with a block of wood on top underneath the engine oil pan remove the front engine mount, remove the crank shaft pulley (the four Allen head bolts only not the 17mm bolt in the center.) Remove the metal plate behind the engine mount bracket on the engine, remove the plastic timing belt cover, three clips on top and two 10mm bolts on bottom. Rotate the engine until the #1 cyl. is at Top Dead Center (TDC) on the compression stroke or line up the crankshaft timing mark with the mark on the inner timing belt cover (notch in cover with notch in pulley) on the camshaft pulleys (intake cam line up the line on the pulley with the line on the inner cover) (exhaust cam line up the arrow on the pulley with the arrow on the inner cover) Now loosen the 13mm bolt in the belt tensioner and using the Allen wrench, rotate the tab until there is slack in the belt. Remove the timing belt. At this time I would recommend you replace the water pump, both plastic idler pulleys as they tend to overheat and lockup, and the belt tensioner. Make sure all your marks are lined up, you may need a helper to hold the exhaust cam in place as it tends to move during belt installation. Put the timing belt underneath the crankshaft pulley, install the belt leaving the intake cam for last and NO BELT SLACK on the right side between the crank and the exhaust cam. Once the belt is installed, rotate the crankshaft over two revolutions and make sure is rotates freely, and your timing marks are aligned perfectly. If not, the engine will not run properly, tension the belt as needed. Installation is the same as removal.

To clarify, on the DOHC engine, the intake cam gear has a line on it, and the exhaust cam gear has an arrow on it. These should be lined up with the corresponding line and arrow on the VALVE COVER, pointing straight up. I just went through this process over the weekend, and spent quite a bit of time looking for these marking as I had removed the valve cover. Once I found them, it was plain and simple.
In addition, be sure to not over tighten the belt when reinstalling. The tensioner has markings on it for "old" and "new". DO NOT adjust past "new", as the car will sound like a jet engine, and the belt will not last for very long. One more item that you might as well replace while you are in there is the cam position sensor if you have not already replaed it as there have been issues with them, and the timing housing has to be opened to get to it. The timing is set at: 8 degrees (both manual and automatic transmission)


Feb 05, 2011 | 2001 Daewoo Nubira

1 Answer

How to set the timing on a 2000 daewoo nubira


You will need these tools:
13mm open end wrench 10mm shallow and deep socket 8mm socket long flathead screwdriver 17mm deep socket T50 torx socket 1/4", 3/8ths and 1/2" ratchets and extensions E10 inverted torx sockets 6mm Allen wrench 15mm open end wrench 7mm socket 12mm open end wrench 14mm socket 12mm socket 8mm, 9mm and 10mm Allen head sockets 19mm socket pry bar needle nose pliers.

If you are doing this because your timing belt broke, you will also need to buy a complete cylinder head, head gasket set, and both idler pulleys. ALL DAEWOO MODELS WILL BREAK THE INTAKE AND EXHAUST VALVES WHEN THE TIMING BELT BREAKS.
Start by removing the air cleaner assembly from the throttle body, remove the air filter and housing jack up the vehicle and remove the wheel, remove the plastic shielding in front of the accessory drive belt assembly, remove the accessory drive belt, place a jack with a block of wood on top underneath the engine oil pan remove the front engine mount, remove the crank shaft pulley (the four Allen head bolts only not the 17mm bolt in the center.) Remove the metal plate behind the engine mount bracket on the engine, remove the plastic timing belt cover, three clips on top and two 10mm bolts on bottom. Rotate the engine until the #1 cyl. is at Top Dead Center (TDC) on the compression stroke or line up the crankshaft timing mark with the mark on the inner timing belt cover (notch in cover with notch in pulley) on the camshaft pulleys (intake cam line up the line on the pulley with the line on the inner cover) (exhaust cam line up the arrow on the pulley with the arrow on the inner cover) Now loosen the 13mm bolt in the belt tensioner and using the Allen wrench, rotate the tab until there is slack in the belt. Remove the timing belt. At this time I would recommend you replace the water pump, both plastic idler pulleys as they tend to overheat and lockup, and the belt tensioner. Make sure all your marks are lined up, you may need a helper to hold the exhaust cam in place as it tends to move during belt installation. Put the timing belt underneath the crankshaft pulley, install the belt leaving the intake cam for last and NO BELT SLACK on the right side between the crank and the exhaust cam. Once the belt is installed, rotate the crankshaft over two revolutions and make sure is rotates freely, and your timing marks are aligned perfectly. If not, the engine will not run properly, tension the belt as needed. Installation is the same as removal.
To clarify, on the DOHC engine, the intake cam gear has a line on it, and the exhaust cam gear has an arrow on it. These should be lined up with the corresponding line and arrow on the VALVE COVER, pointing straight up. I just went through this process over the weekend, and spent quite a bit of time looking for these marking as I had removed the valve cover. Once I found them, it was plain and simple.
In addition, be sure to not over tighten the belt when reinstalling. The tensioner has markings on it for "old" and "new". DO NOT adjust past "new", as the car will sound like a jet engine, and the belt will not last for very long. One more item that you might as well replace while you are in there is the cam position sensor if you have not already replaed it as there have been issues with them, and the timing housing has to be opened to get to it. The timing is set at: 8 degrees (both manual and automatic transmission)

Sep 08, 2010 | 2000 Daewoo Nubira

2 Answers

How to change the timing belt on a 2001 daewoo nubira


follow these instructions exactly, be sure u get it right or u will bend the engine valves this is an interference engine, if u have a broken belt u most likey have bent valves, about 90% of the time the valves do get bent.
here are the instructions.

Required tools:
13mm open end wrench 10mm shallow and deep socket 8mm socket long flathead screwdriver 17mm deep socket T50 torx socket 1/4", 3/8ths and 1/2" ratchets and extensions E10 inverted torx sockets 6mm Allen wrench 15mm open end wrench 7mm socket 12mm open end wrench 14mm socket 12mm socket 8mm, 9mm and 10mm Allen head sockets 19mm socket pry bar needle nose pliers
If you are doing this because your timing belt broke you will also need to buy a complete cylinder head, head gasket set, and both idler pulleys. ALL DAEWOO MODELS WILL BREAK THE INTAKE AND EXHAUST VALVES WHEN THE TIMING BELT BREAKS.
Start by removing the air cleaner assembly from the throttle body, remove the air filter and housing jack up the vehicle and remove the wheel, remove the plastic shielding in front of the accessory drive belt assembly, remove the accessory drive belt, place a jack with a block of wood on top underneath the engine oil pan remove the front engine mount, remove the crank shaft pulley ( the 4 Allen head bolts only not the 17mm bolt in the center.) remove the metal plate behind the engine mount bracket on the engine, remove the plastic timing belt cover 3 clips on top 2 10mm bolts on bottom. Rotate the engine until the #1 cyl. is at Top Dead Center on the compression stroke or line up the crankshaft timing mark with the mark on the inner timing belt cover ( notch in cover with notch in pulley) on the camshaft pulleys -- ( intake cam line up the line on the pulley with the line on the inner cover)( exhaust cam line up the arrow on the pulley with the arrow on the inner cover) loosen the 13mm bolt in the belt tensioner and using the Allen wrench rotate the tab until there is slack in the belt. Remove the belt. At this time I would recommend you replace the water pump, both plastic idler pulleys as they tend to overheat and lockup, and the belt tensioner. Make sure all your marks are lined up, you may need a helper to hold the Exhaust Cam in place as it tends to move during belt installation. Put the timing belt underneath the crankshaft pulley, install the belt leaving the intake cam for last and NO BELT SLACK on the right side between the crank and the exhaust cam. Once the belt is installed rotate the crankshaft over 2 revolutions and make sure is rotates freely, and your timing marks are aligned perfectly if not the engine will not run properly, tension the belt as needed. Installation is the same as removal.

To clarify, on the DOHC engine, the intake cam gear has a line on it, and the exhaust cam gear has an arrow on it. These should be lined up with the corresponding line and arrow on the VALVE COVER, pointing straight up. I just went through this process over the weekend, and spent quite a bit of time looking for these marking as I had removed the valve cover. Once I found them, it was plain and simple.
In addition, be sure to not over tighten the belt when reinstalling. The tensioner has markings on it for "old" and "new". DO NOT adjust past "new", as the car will sound like a jet engine, and the belt will not last for very long.
One more item that you may as well replace while you are in there is the cam position sensor if you have not already, as there have been issues with them, and the timing housing has to be opened to get to it

Apr 22, 2010 | 2001 Daewoo Nubira

1 Answer

Daewoo nubira injectors arent firing ...the timing belt broke which bent the valves ive had the head fixed and put back to gether and it still wont start....afte some tests we found the injectors are...


if timming marks were set correctly and it is single cam engine were lifters bleed out before assembly? it may not have any compression
may have to remove top rocker cover only and use lever to push down on rockers to there is clearance between cam

Jun 10, 2009 | 1999 Daewoo Nubira

3 Answers

Timing Belt Tensioner bolt broken off.


You may have a serious problem (timing belt tensioner). This tensioner keeps the belt 'taut' so it won't jump time. Daewoo engines are 'interferrence' engines (this means if the valve timing is 'off' (out of syncronization) you can damage/bend the valves in the head -- valve timing (timing belt ensures this). The solution is to take the vehicle into the shop and have it diagnosed to be sure/to know if any damage has occured -- if none, replace the tensioner... it's pretty simple to do, if you have the service manual.

May 26, 2009 | 2000 Daewoo Nubira

1 Answer

Broke timing belt and bent valves . i have reconditioned the head and replaced timing belt but have no oil presure . how do i get to the oil pump to check


When you put on the head there are two oil pressure plugs under the cams with reverse torque heads. Did you put them in the new head?

Mar 14, 2009 | 1999 Daewoo Nubira

1 Answer

Cannot figure out timing marks on a 2000 daewoo nubira


Required tools:
13mm open end wrench 10mm shallow and deep socket 8mm socket long flathead screwdriver 17mm deep socket T50 torx socket 1/4", 3/8ths and 1/2" ratchets and extensions E10 inverted torx sockets 6mm Allen wrench 15mm open end wrench 7mm socket 12mm open end wrench 14mm socket 12mm socket 8mm, 9mm and 10mm Allen head sockets 19mm socket pry bar needle nose pliers
If you are doing this because your timing belt broke you will also need to buy a complete cylinder head, head gasket set, and both idler pulleys. ALL DAEWOO MODELS WILL BREAK THE INTAKE AND EXHAUST VALVES WHEN THE TIMING BELT BREAKS.
Start by removing the air cleaner assembly from the throttle body, remove the air filter and housing jack up the vehicle and remove the wheel, remove the plastic shielding in front of the accessory drive belt assembly, remove the accessory drive belt, place a jack with a block of wood on top underneath the engine oil pan remove the front engine mount, remove the crank shaft pulley ( the 4 Allen head bolts only not the 17mm bolt in the center.) remove the metal plate behind the engine mount bracket on the engine, remove the plastic timing belt cover 3 clips on top 2 10mm bolts on bottom. Rotate the engine until the #1 cyl. is at Top Dead Center on the compression stroke or line up the crankshaft timing mark with the mark on the inner timing belt cover ( notch in cover with notch in pulley) on the camshaft pulleys -- ( intake cam line up the line on the pulley with the line on the inner cover)( exhaust cam line up the arrow on the pulley with the arrow on the inner cover) loosen the 13mm bolt in the belt tensioner and using the Allen wrench rotate the tab until there is slack in the belt. Remove the belt. At this time I would recommend you replace the water pump, both plastic idler pulleys as they tend to overheat and lockup, and the belt tensioner. Make sure all your marks are lined up, you may need a helper to hold the Exhaust Cam in place as it tends to move during belt installation. Put the timing belt underneath the crankshaft pulley, install the belt leaving the intake cam for last and NO BELT SLACK on the right side between the crank and the exhaust cam. Once the belt is installed rotate the crankshaft over 2 revolutions and make sure is rotates freely, and your timing marks are aligned perfectly if not the engine will not run properly, tension the belt as needed. Installation is the same as removal.

To clarify, on the DOHC engine, the intake cam gear has a line on it, and the exhaust cam gear has an arrow on it. These should be lined up with the corresponding line and arrow on the VALVE COVER, pointing straight up. I just went through this process over the weekend, and spent quite a bit of time looking for these marking as I had removed the valve cover. Once I found them, it was plain and simple.
In addition, be sure to not over tighten the belt when reinstalling. The tensioner has markings on it for "old" and "new". DO NOT adjust past "new", as the car will sound like a jet engine, and the belt will not last for very long.
One more item that you may as well replace while you are in there is the cam position sensor if you have not already, as there have been issues with them, and the timing housing has to be opened to get to it

Mar 04, 2009 | 2002 Daewoo Nubira

1 Answer

Timing marks for a daewoo nubira cdx


Here is a pic if the timing marks two small marks on the cam pulleys and one small cut away on the crank pulley .
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Dec 14, 2008 | 1999 Daewoo Nubira

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