Pontiac 12635427 Chain Assembly, Water Pump & Balancer Shaft

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Start by disconnecting the negative battery terminal and draining the engine oil to remove and inspect the balance shaft chain and balance shafts. The timing chain, timing chain guides, and sprockets will be removed with engine at TDC for cylinder number 1. Remove the upper balance shaft chain guide, small balance shaft chain guide, adjustable balance shaft chain guide, and finally the balance shaft chain tensioner. Then take out the balance shaft drive chain as well as if needed, the balance shafts (note that removing the shaft requires pulling out engine from vehicle and replacing bushings needs automotive machine shop). Check for wear or damage on components and replace any damaged parts as necessary. In installing, ensure crankshaft timing mark is in proper position at 6 o'clock. Install both of them into their bores and then tighten down retainer bolts. Locate arrows up and down on each sprocket used as a marking point for balancing areas make sure they neither move nor rotate by inserting drill bits through holes provided in both sides of each sprocket. Installing the balance shaft chain would involve aligning with colored links with marks on sprocket followed by resetting its tensioner. Timing marks should be rechecked after which the timing chain together with all parts previously removed should be re-installed. After these have been done reconnect battery cable positive side first while negative lastly before putting back oil filter, filling crankcase with oil again before starting up car and check if there are leaks anywhere inside it when running. Remember that unless you are an expert in this area do not attempt to remove any of these shafts because generally it means taking engine out of vehicle which becomes more complicated task to deal with.

This procedure includes the dismantling of a balance shaft chain and balance shafts with the restrictions that the shafts has to be removed from the engine block and that this block is located inside the vehicle so the engine has to be removed first. If there is a problem with the balance shafts that require their pulling out, the engine has to be pulled out anyway since the only fix for balance shaft bushings is in an automotive machine shop. In case, mere chain replacement is being done, other steps that are not necessary can be ignored. Start by removing the battery's negative terminal and dropping the oil pan to drain it. Siants place the engine driving gear at TDC for cylinder no 1, then take off the timing chain, the guides and sprockets and the balance shaft chain tensioner and the guides. The next step is to take off the balance shaft drive chain and keep the camshaft non-rotating. If the balance shafts are being removed, then remove the retainer bolts and the shafts from the engine block, but you'll have to make sure that you note down the position of each shaft as they are unique and cannot be swapped around for the other one. Wash all components and check on the condition of the chain tensioners, guides and sprockets and where necessary replace them. It is recommended that the crankshaft timing mark be positioned at 6 O'clock before fitting the balance shaft chain and the engine should not be turned if it has been moved by mistake. Place the balance shafts properly and fasten the retainer bolts; the sprockets should be adjusted and the chain fitted with the colour coded links to the alignment marks. Once the positioning is done, fits the guides in place then set the tension arcs before fixing the tensioner arc. Double check all the timing marks, replace the timing chain and all other components removed, reconnect the battery, install a new oil filter and refill the crankcase with oil, and finally a road test with and eye out for any leaks.

Start by disconnecting the negative battery terminal and draining the engine oil to remove and inspect the balance shaft chain and balance shafts. The timing chain, timing chain guides, and sprockets will be removed with engine at TDC for cylinder number 1. Remove the upper balance shaft chain guide, small balance shaft chain guide, adjustable balance shaft chain guide, and finally the balance shaft chain tensioner. Then take out the balance shaft drive chain as well as if needed, the balance shafts (note that removing the shaft requires pulling out engine from vehicle and replacing bushings needs automotive machine shop). Check for wear or damage on components and replace any damaged parts as necessary. In installing, ensure crankshaft timing mark is in proper position at 6 o'clock. Install both of them into their bores and then tighten down retainer bolts. Locate arrows up and down on each sprocket used as a marking point for balancing areas make sure they neither move nor rotate by inserting drill bits through holes provided in both sides of each sprocket. Installing the balance shaft chain would involve aligning with colored links with marks on sprocket followed by resetting its tensioner. Timing marks should be rechecked after which the timing chain together with all parts previously removed should be re-installed. After these have been done reconnect battery cable positive side first while negative lastly before putting back oil filter, filling crankcase with oil again before starting up car and check if there are leaks anywhere inside it when running. Remember that unless you are an expert in this area do not attempt to remove any of these shafts because generally it means taking engine out of vehicle which becomes more complicated task to deal with.

These are the following processes in removing the components, connect the cable to the negative terminal of the battery and drain the engine oil. Align the engine at Top Dead Centre for cylinder number 1, then remove the timing chain, and the guide and sprockets . Finally, remove the balance shaft chain tensioner. Just after the removal insert the special tool no .EN50837 into the lever arm and then rotate the same anti clockwise until the tensioner is compressed. Continue slowly releasing the lever arm and when the lever arm reaches the required position for the tensioner which gives three clicking sound, turn the lever arm clockwise till the holes are inline to lock the tensioner. Take out the balance shaft chain guide bolts and the chain guide, and name 'b' the original bolt for the crankshaft pulley, then tighten it. While removing the valve clearance adjustment tool, spin the crankshaft pulley using a special tool to loosen the balance shaft sprocket bolt. Finally having taken out the crankshaft pulley tool, pulley and bolt next, remove the balance shaft sprocket bolt, the crankshaft sprocket the balance shaft chain and having removed the balance shaft sprocket, place the whole assembly aside. Take out all the balance shaft bolts and then lower the balance shaft module from the engine block. Wash down all the parts with the solvent and blowing dry with air compression, check the chain tensioner, the guides for balance shaft chain, the balance shaft chain and the oil pump for signs of wear or damage, should they show signs of damage they have to be replaced. If required, fit the oil pump to the balance shaft module and then the balance shaft module assembly can be fitted to the engine and the mounting bolts tightened by hand. Torque the balance shaft module bolts in the sequence to the early torque. Check to make sure that the crankshaft timing keyway has been rotated to TDC before fitting the balance shaft chain on the crankshaft timing chain sprocket with the small colourcoded link in line with the timing mark on the crankshaft sprocket and the other fitted to the timing mark on the balance shaft driven sprocket. Mount the chain and gear assembly with attention to the timing marks being in the correct position. Reinstall the crankshaft pulley and the old bolt for the time being, then torque it properly; then while using a special tool engaging the crankshaft pulley and tightening the new balance shaft sprocket bolt to the required torque. Take out the crankshaft pulley tool, crankshaft pulley and bolt and fit the balance chain guide with the elongated portion towards the crankshaft as before, securing the bolts to the prescribed torque. Ensure fastening of the balance chain tensioner and both the tensioner bolts to the recommended torque. Take out the retaining pin on the tensioner arm and let it go back release the tension to the chain check all balance shaft chain timing marks. Next, fit in the timing chain and timing chain cover, then the upper oil pan was then fitted in. The rest of the installation steps are opposite of removal steps are follows. Connect the battery again, change the oil filter, put more oil in the crankcase, add more water in the cooling system and finally start the car and look for any signs of leakage.

This procedure includes the dismantling of a balance shaft chain and balance shafts with the restrictions that the shafts has to be removed from the engine block and that this block is located inside the vehicle so the engine has to be removed first. If there is a problem with the balance shafts that require their pulling out, the engine has to be pulled out anyway since the only fix for balance shaft bushings is in an automotive machine shop. In case, mere chain replacement is being done, other steps that are not necessary can be ignored. Start by removing the battery's negative terminal and dropping the oil pan to drain it. Siants place the engine driving gear at TDC for cylinder no 1, then take off the timing chain, the guides and sprockets and the balance shaft chain tensioner and the guides. The next step is to take off the balance shaft drive chain and keep the camshaft non-rotating. If the balance shafts are being removed, then remove the retainer bolts and the shafts from the engine block, but you'll have to make sure that you note down the position of each shaft as they are unique and cannot be swapped around for the other one. Wash all components and check on the condition of the chain tensioners, guides and sprockets and where necessary replace them. It is recommended that the crankshaft timing mark be positioned at 6 O'clock before fitting the balance shaft chain and the engine should not be turned if it has been moved by mistake. Place the balance shafts properly and fasten the retainer bolts; the sprockets should be adjusted and the chain fitted with the colour coded links to the alignment marks. Once the positioning is done, fits the guides in place then set the tension arcs before fixing the tensioner arc. Double check all the timing marks, replace the timing chain and all other components removed, reconnect the battery, install a new oil filter and refill the crankcase with oil, and finally a road test with and eye out for any leaks.

A note at the end stresses that this is a delicate procedure and if undertaken, the engine must be removed from the vehicle although care should be taken since replacement of balance shaft bushings needs a professional machine shop. The removal starts with disconnecting the negative battery cable, draining the oil in the engine, detaching of sprockets, guides and timing chains as well as ensuring that the engine is in TDC for cylinder number 1. Also, chain tensioner and guides of balance shaft are removed after which balance shaft drive chain is released. When removing balance shafts (engine removed), remove balance shaft retainer bolts so as to pull them out carefully from the engine block with caution to mark them for proper reassembly. Various components need to be inspected for damage or wear. The most important thing when installing is to ensure that number one piston is at TDC given that crankshaft has been rotated. Then tighten balance shaft retainer bolts once balance shafts are installed into engine block. This part explains how to align a set of sprockets of balance shaft and how chain fits them using locating marks and colored links on them as references. It consists of installation of chain guides, resetting and reinstalling balance shaft chain tensioner, checking timing marks etc. Finally, put back both timing chain and all other components you had removed earlier then reconnect battery.

Start by disconnecting the negative battery terminal and draining the engine oil to remove and inspect the balance shaft chain and balance shafts. The timing chain, timing chain guides, and sprockets will be removed with engine at TDC for cylinder number 1. Remove the upper balance shaft chain guide, small balance shaft chain guide, adjustable balance shaft chain guide, and finally the balance shaft chain tensioner. Then take out the balance shaft drive chain as well as if needed, the balance shafts (note that removing the shaft requires pulling out engine from vehicle and replacing bushings needs automotive machine shop). Check for wear or damage on components and replace any damaged parts as necessary. In installing, ensure crankshaft timing mark is in proper position at 6 o'clock. Install both of them into their bores and then tighten down retainer bolts. Locate arrows up and down on each sprocket used as a marking point for balancing areas make sure they neither move nor rotate by inserting drill bits through holes provided in both sides of each sprocket. Installing the balance shaft chain would involve aligning with colored links with marks on sprocket followed by resetting its tensioner. Timing marks should be rechecked after which the timing chain together with all parts previously removed should be re-installed. After these have been done reconnect battery cable positive side first while negative lastly before putting back oil filter, filling crankcase with oil again before starting up car and check if there are leaks anywhere inside it when running. Remember that unless you are an expert in this area do not attempt to remove any of these shafts because generally it means taking engine out of vehicle which becomes more complicated task to deal with.

This procedure describes the pulling off of the balance shaft chain and the balance shafts; nevertheless, it is necessary to mention that the shafts can only be withdrawn with the help of the engine removal from the vehicle. In the event that there is ever a problem with the balance shafts that requires them to be removed a full engine removal is needed anyway because the replacement of the balance shaft bushings requires an automotive machine shop. For those people who only study the chain removal or replacement, unrelated steps can be omitted. Start with disabling the car's electrical system by removing the unfavorable terminal of the battery, and then drain the engine oil. For the timing chain to be removed, the chain, guides, sprockets and the crankshaft balancer should be taken of while seeing to it that the engine is at TDC for cylinder number 1 while avoiding to turn the engine unless it has been turned already. Go ahead and take off the balance shaft chain tensioner, adjustable guide, small guide, and upper guide The balance shaft drive chain is to collected at slack between the water pump and crank shaft sprockets. If one is operating on balance shafts, remove the retainer bolts, and the shafts themselves and noting each in order to avoid horrible vibrations from the engine. Wash all the assembly in solvent and check the tensioners, guides, chain, and sprockets for any signs of wear or damage; such parts must be replaced if there is visible damage. To confirm the crankshaft position before fitting of the balance shaft chain make sure that the timing mark is in the 6 o'clock position. Screw on the balance shafts and fasten the retainers bolts so as to align the sprockets and secure temporarily using a drill. Position the balance shaft chain with the bright colored links engaged into the sprocket teeth, position the chain on the water pump sprocket as well as the exhaust balance shaft sprocket. Fit the balance shaft chain guides and torque the bolts then the tensioner will be set by rotating the plunger and locking it with a paper fastener and a drill. When the tensioner has been bolted and had its bolts tightened turn the drill bit to release the plunger and double check the timing marks. Last of all, fit the timing chain and all parts that were removed, reconnect the battery, fit a new oil filter, fill the crankcase with oil and start the engine and check for oil leaks.

A note at the end stresses that this is a delicate procedure and if undertaken, the engine must be removed from the vehicle although care should be taken since replacement of balance shaft bushings needs a professional machine shop. The removal starts with disconnecting the negative battery cable, draining the oil in the engine, detaching of sprockets, guides and timing chains as well as ensuring that the engine is in TDC for cylinder number 1. Also, chain tensioner and guides of balance shaft are removed after which balance shaft drive chain is released. When removing balance shafts (engine removed), remove balance shaft retainer bolts so as to pull them out carefully from the engine block with caution to mark them for proper reassembly. Various components need to be inspected for damage or wear. The most important thing when installing is to ensure that number one piston is at TDC given that crankshaft has been rotated. Then tighten balance shaft retainer bolts once balance shafts are installed into engine block. This part explains how to align a set of sprockets of balance shaft and how chain fits them using locating marks and colored links on them as references. It consists of installation of chain guides, resetting and reinstalling balance shaft chain tensioner, checking timing marks etc. Finally, put back both timing chain and all other components you had removed earlier then reconnect battery.

This procedure includes the removal of the balance shaft chain and balance shafts; the removal of the shafts is only effected if the engine has been extracted from the car. Any time there is a problem with the balance shafts that will require their pull, the engine has to come out anyway, since replacing the balance shaft bushings demands an automotive machine shop. But for those that are only pulling out or splicing the chain such information irrelevant to the activity at hand can be discarded. It is necessary to start by removing the negative terminal cable of the battery, then the engine oil dumping, and placement of the engine into the Top Dead Centre for number one cylinder. Following this, eliminate also the timing chain, the timing chain guides and sprockets and eventually the balance shaft chain tensioner, and the adjustable balance shaft chain guide. Proceed by taking out the small and upper balance shaft chain guides, then the balance shaft drive chain being careful to gather slack in between the water pump sprocket and the crankshaft sprocket. If for some reason the balance shafts are being removed, then remove the balance shaft retainer bolts and then the shafts from the block of the engine. Wipe all components with the solvent and dry the components with compressed air, paying attention to the chain tensioners, balance shaft chain guides and the balance shaft chain and the crankshaft and water pump sprockets for wear or damage if so, change the parts. Therefore, before reinstalling the balance shaft chain, the crankshaft timing mark should be aligned at the bottom most position. Place the balance shafts in their bores and then tighten the retainer bolts to the required specifications. Once everything is prepared, before the balance shaft chain is put in place, align the sprockets to ensure that, with the help of a drill's bit, the intake side sprocket with the arrow pointing upwards is locked, while the exhaust side sprocket has the arrow pointing downwards. The balance shaft chain should be fitted with the Bright copper link positioned on the intake side of the crankshaft and the white or silver links on the exhaust side or crankshaft side of the balance shaft sprocket. Fit the balance shaft chain guides and tighten the bolts, reposition the balance shaft chain tensioner by turning the plunger by 90 degrees in order to compress the chain and lock it in position with the small stock of a drill. Correct the timing of the upper and lower sprockets, set the tension with the tensioner, tighten the upper bolts with a torque wrench and remove the drill bit to free the plunger, All the timing marks should be set correctly. Last but not the least it is necessary to replace the timing chain and all those components which are removed earlier, connect the battery terminals, fix the new oil filter, lubricate the crankcase with oil and start the engine for identification of leakage if any.