Timing chain and sprockets — removal, inspection and installation
Warning: Wait until the engine is completely cool before beginning this procedure. Caution: The timing system is complex. Severe engine damage will occur if you make any mistakes. Do not attempt this procedure unless you are highly experienced with this type of repair. If you are at all unsure of your abilities, consult an expert. Double-check all your work and be sure everything is correct before you attempt to start the engine.
Removal
1. Disconnect the cable from the negativebattery terminal (see Engine electrical systems).
2. Set the engine to TDC on the compression stroke for cylinder number 1 (see Top Dead Center (TDC) for number one piston — locating).
3. On 2015 and later CR-V models, removethe high-pressure fuel pump (see Fuel and exhaust systems).
4. Remove the valve cover (see Valve cover — removal and installation).
5. Remove the timing chain cover (see Timing chain cover — removal and installation).
6. Rotate the crankshaft counterclockwiseslightly to compress the chain tensioner. Install a 0.06-inch (1.5 mm) pin into the alignment holes (see illustration) and rotate the crankshaft slightly clockwise, returning it to TDC, to secure the pin.
i.6 Align the hole on the lock with the hole in the tensioner, then insert a 0.06-inch (1.5 mm) pin or drill bit through both components to lock the tensioner
7. Remove the mounting bolts and the timing chain tensioner.
8. Remove the upper timing chain guidefrom between the camshaft sprockets.
9. Remove the camshaft timing chain guideand the tensioner arm (chain guide).
10. Remove the timing chain.
Inspection
11. Clean all parts with solvent. Dry withcompressed air, if available.
12. Inspect the chain tensioner for excessive wear or other damage. Be sure to drain all the oil out of the chain tensioner if it is to be reused.
13. Inspect the timing chain guides for deep grooves, excessive wear, or other damage.
14. Inspect the timing chain for excessive wear or damage.
15. Inspect the crankshaft and camshaft sprockets for chipped or broken teeth, excessive wear, or damage. Replace any component that is in questionable condition.
Installation
Caution: Before starting the engine, carefully rotate the crankshaft by hand through at least two full revolutions (use a socket and breaker bar on the crankshaft pulley center bolt). If you feel any resistance, STOP! There is something wrong — most likely, valves are contacting the pistons. You must find the problem before proceeding. Check your work and see if any updated repair information is available.16 Make sure the timing mark (triangle) on the crankshaft sprocket is aligned with the pointer on the engine block.
17. Make sure the chain alignment dots (circular indentation) on the Variable valve Timing Control (VTC) actuator and the exhaust camshaft sprocket are approximately at the 12 o’clock position. The TDC alignment marks on the sprockets should be opposite each other at the 9 and 3 o’clock positions (see illustration).
i.17 When the engine is at TDC compression for cylinder no. 1, the bright links (A) on the timing chain must align with the marks (B) on the sprockets. (C) are the camshaft sprocket TDC marksand (D) are the crankshaft sprocketTDC marks
18. Install the timing chain around the crankshaft sprocket with the colored link on the chain aligned with the dot (circular indentation) on the crankshaft sprocket (see illustration 17).
19. Install the timing chain over the exhaust camshaft sprocket and the VTC actuator (intake camshaft sprocket) with the marks aligned with each pair of colored chain links.
20. Install the camshaft timing chain guide and the tensioner arm. Tighten the bolts to the torque listed in this Chapter’s Specifications.
21. Install the timing chain tensioner. Tighten the bolts to the torque listed in this Chapter’s Specifications.
22. Install the upper timing chain guide. Tighten the bolts to the torque listed in this Chapter’s Specifications.
23. Remove the pin from the timing chain tensioner.
24. Slowly turn the crankshaft clockwise two revolutions and recheck the timing marks and camshaft sprocket index marks for proper alignment.
Caution: If the crankshaft binds or seems to hit something, do not force it, as the valves may be hitting the pistons. If this happens, valve timing is incorrect. Remove the chain and repeat the installation procedure and verify that the installation is correct.
25. Install the valve cover (see Valve cover — removal and installation).
26. Install the timing chain cover (see Timing chain cover — removal and installation).
27. The remainder of installation is the reverse of the removal steps.
28. Reconnect the battery (see Engine electrical systems).
29. Run the engine and check for leaks.