Water Pump: Service and Repair
Coolant Pump
Removal
NOTICE: During engine repair procedures, cleanliness is extremely important. Any foreign material, including any material created while cleaning gasket surfaces, that enters the oil passages, coolant passages or the oil pan may cause engine failure.
1. With the vehicle in NEUTRAL, position it on a hoist.
2. Drain the cooling system. For additional information, refer to Cooling System Draining, Filling and Bleeding Cooling System Draining, Filling and Bleeding.
3. Remove the engine front cover.
4. Remove and discard the engine oil filter.
5. Rotate the crankshaft clockwise and align the timing marks on the Variable Camshaft Timing (VCT) assemblies as shown.
6. NOTE: The Camshaft Holding Tool will hold the camshafts in the Top Dead Center (TDC) position.
Install the Camshaft Holding Tool onto the flats of the LH camshafts.
7. NOTE: The Camshaft Holding Tool will hold the camshafts in the TDC position.
Install the Camshaft Holding Tool onto the flats of the RH camshafts.
8. Remove the 3 bolts and the RH VCT housing.
9. Remove the 3 bolts and the LH VCT housing.
10. Remove and discard the VCT housing seals.
11. Remove the 2 bolts and the primary timing chain tensioner.
12. Remove the primary timing chain tensioner arm.
13. Remove the 2 bolts and the lower LH primary timing chain guide.
14. Remove the primary timing chain.
15. Remove the 2 bolts and the upper LH primary timing chain guide.
16. Remove the RH primary timing chain guide lower bolt.
17. NOTE: The RH primary timing chain guide must be repositioned to allow the coolant pump to be removed.
Loosen the RH primary timing chain guide upper bolt.
- Rotate the guide and tighten the bolt.
18. Place clean lint-free shop towels in the oil pan opening to prevent coolant from entering the oil pan during coolant pump removal.
19. Remove the 8 bolts and the coolant pump.
Installation
1. NOTE: Clean and inspect all sealing surfaces.
Install the coolant pump and the 8 bolts.
- Tighten in the sequence shown to 10 Nm (89 lb-in).
2. Remove all of the shop towels from the oil pan opening.
3. NOTICE: Any coolant that has accumulated in the oil pan must be drained from the pan and any residual coolant cleaned from the front of the engine and oil pan. Failure to remove all traces of the coolant can result in oil contamination and severe engine damage.
Remove the oil pan drain plug and allow any accumulated coolant to drain.
- Remove any residual coolant from the front of the engine and the oil pan using regulated, compressed air and clean, lint-free shop towels.
- Install the oil pan drain plug and tighten to 27 Nm (20 lb-ft).
4. Loosen the RH primary timing chain guide upper bolt.
- Position the RH primary timing chain guide and install the lower bolt.
- Tighten the 2 bolts to 10 Nm (89 lb-in).
5. Install the primary timing chain with the colored links aligned with the timing marks on the VCT assemblies and the crankshaft sprocket.
6. Install the upper LH primary timing chain guide and the 2 bolts.
- Tighten to 10 Nm (89 lb-in).
7. Install the lower LH primary timing chain guide and the 2 bolts.
- Tighten to 10 Nm (89 lb-in).
8. Install the primary timing chain tensioner arm.
9. Reset the primary timing chain tensioner.
- Rotate the lever counterclockwise.
- Using a soft-jawed vise, compress the plunger.
- Align the hole in the lever with the hole in the tensioner housing.
- Install a suitable lockpin.
10. NOTE: It may be necessary to rotate the crankshaft slightly to remove slack from the timing chain and install the tensioner.
Install the primary tensioner and the 2 bolts.
- Tighten to 10 Nm (89 lb-in).
- Remove the lockpin.
11. As a post check, verify correct alignment of all timing marks.
12. Install new VCT housing seals.
13. NOTE: Make sure the dowels on the VCT housing are fully engaged in the cylinder head prior to tightening the bolts.
Install the LH VCT housing and the 3 bolts.
- Tighten in the sequence shown to 10 Nm (89 lb-in).
14. NOTE: Make sure the dowels on the VCT housing are fully engaged in the cylinder head prior to tightening the bolts.
Install the RH VCT housing and the 3 bolts.
- Tighten in the sequence shown to 10 Nm (89 lb-in).
15. NOTE: Lubricate the engine oil filter gasket with clean engine oil prior to installing the oil filter.
Install a new engine oil filter.
- Tighten to 5 Nm (44 lb-in) and then rotate an additional 180 degrees.
16. Install the engine front cover.
17. Fill and bleed the cooling system. For additional information, refer to Cooling System Draining, Filling and Bleeding Cooling System Draining, Filling and Bleeding.