Question about Oldsmobile Cars & Trucks
Bolt head stripped use locking pliers or chisel/hammer to remove
bolt thread stripped use new bolt and a bolt thread shim foil from autoparts store
Posted on Oct 20, 2013
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Posted on Jan 02, 2017
SOURCE: Tensioner Removal
the 15 mm that is on the tension pulley is not to be taken off. put the bolt back in snug. put the 15mm back on it and pull upwards on the bolt/pulley and that will remove the tension fro the belt enough to remove the belt. and do the same thing to install the new belt. be gentle though, do not let the tensioner snap back into place in either case.
Posted on Sep 23, 2008
The serpentine belt tensioner / pulley is on the front of the engine, and part of the belt 'routing'.
Its job is to put tension on the belt as it drives the other devices like the power steering pump, water pump, air conditioning compressor.
It is an aluminum casting that mounts with a single bolt to the engine. The pulley is attached to the arm.
There are a few ways to move / pry the arm inwards, thus releasing the tension on the belt for removing/installing: grab on the pulley bolt (15mm?) with a wrench, or some later models have an opening for a 3/8th socket wrench to attach to directly without a socket.
Posted on May 10, 2009
if this happened you bent the valves in the engine and the cylinder head must be removed, here are full instructions for a timing belt replacement.
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
Posted on May 26, 2009
your daewoo does not have an interference engine which means that if timing belt slips or breaks there wont be any valve or piston damage
Posted on May 26, 2009
was this the bolt in center of the tensioner pulley? if so you will need to remove and replace the tensioner assembly, if not which bolt did you break?
Posted on May 26, 2009
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