Removing
Removal in the following order:
- remove the timing chain and sprocket from the crankshaft;
Pic. 3.90. Setting the crankshaft key to the left horizontal position (A) after turning the engine crankshaft 90°counterclockwise and the location of the bolt (IN) oil pump drive chain tensioner
- turn the engine crankshaft 90°counterclockwise (from TDC) and install key A (pic. 3.90) crankshaft to the left horizontal position, then unscrew bolt B and remove the oil pump drive chain tensioner;
Pic. 3.91. Removing the sprocket with the oil pump drive chain from the crankshaft
- remove the sprocket with the oil pump drive chain from the crankshaft (pic. 3.91);
Pic. 3.92. The location of the oil pump mounting bolts
- Remove the 3 bolts securing the oil pump to the cylinder block (pic. 3.92). Use a screwdriver to separate the oil pump from the cylinder block.
Installation
Use a hard plastic or wooden scraper to remove any old sealant from the mating surfaces of the oil pump and cylinder block and clean with solvent.
Check the oil pump for damage.
Pic. 3.62. Measuring the distance between chain links: X = 122.6 mm for the timing chain between 16 rollers or 8 chain links; X = 52.4 mm for oil pump drive chain between 8 rollers or 4 chain links
Check chain links for cracks, worn rollers and side plates. Check the condition of the sprocket teeth, which should be symmetrical. Tension the chain and measure the distance between 8 rollers or 4 chain links, which should be 52.4 mm (see fig. 3.62). Carry out this check on several sections of the chain. If the chain lengthens, replace the chain and sprockets as a set.
Pic. 3.63. Measuring the sprocket diameter using the chain rollers
Wrap a chain around each sprocket and measure the diameter of the sprocket against the chain rollers (see fig. 3.63). If the resulting size exceeds the minimum chain diameter, replace the chain and sprockets as a set.
Pic. 3.93. Places for measuring the depth of the recesses on the oil pump drive chain guide: X = no more than 0.5 mm
Pic. 3.94. Chain guide lubrication hole location
Check the chain guide for excessive wear. Keep in mind that slight wear on the guide is normal. The depth of the grooves on the chain guide should be no more than 0.5 mm (pic. 3.93). If there is excessive wear, check the chain guide lube hole on the front of the cylinder block for dirt or blockage (pic. 3.94). If the hole is blocked, then the wear of the timing chains and the oil pump will increase dramatically.
Install in the following order:
- fill the oil pump with oil, for which pour a small amount of clean engine oil into the pump inlet and rotate the pump drive shaft;
- install the oil pump with a new gasket on the cylinder block and secure with bolts, tightening them crosswise with a torque of 19 Nm;
Pic. 3.95. Matching the colored marks on the chain with the marks on the sprockets
- make sure the crankshaft is rotated 90°counterclockwise, the crankshaft key is in the left horizontal position, and the oil pump drive sprocket is with the index mark up. Install the oil pump drive chain onto the sprockets so that the colored marks on the chain line up with the marks on the sprockets (pic. 3.95);
- screw in and tighten the oil pump sprocket bolt to 30 Nm;
- install the chain tensioner and secure it with a bolt, tightening the bolt with a torque of 12 Nm.
Further installation is carried out in the reverse order of removal, taking into account the following.
Check and, if necessary, top up the oil level.
Start the engine and check the pressure and check for oil leaks.