Water pump location and replacement

PACKERS27

MEMBER
2007 PONTIAC G5
2.4L
4 CYL
2WD
AUTOMATIC
140,000 MILES

I just want to know if anyone has a diagram that you guys could share with me because it is so compact under the hood and it's hard to see down the left side of the motor to see which one the water pump actually is. I see a little bit of water running now do there so I know it's leaking, but I may have to take the passenger side tire off to even have a chance to access it. I just need a little help please.

5 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Good morning,

Below is the procedure and there are some pictures.

This is an involved job. Not very easy as the timing cover has to be removed.

Roy

Tools Required

J 43651 Water Pump Holding Tool

Removal Procedure

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1. Remove the thermostat housing.
2. Remove the water pump access plate from the front cover.
3. Remove the right hand fender liner.

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Important: A drain plug has been provided at the bottom of the water pump assembly for additional coolant drainage from the engine block and water pump.

4. Drain the coolant from the water pump using the plug at the bottom of the pump.

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Important: The water pump holding tool supports the sprocket and chain during water pump service. The tool must be used or the balance shaft must be re-timed.

5. Install the J 43651 into position.
6. Tighten the bolts on the water pump holding tool into the threads on the water pump sprocket.
7. Install the access cover bolts that were removed earlier to secure the water pump holding tool to the front cover assembly.
8. Remove the 3 inner water pump sprocket to water pump blots.

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Important: Be sure to remove both water pump bolts from the front of the engine block.

9. Remove the 2 water pump bolts.

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10. Remove the rear 2 water pump bolts.

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11. Remove the water pump.
12. Remove and discard the water pump O-ring seal.

Installation Procedure

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Important: Prior to installing the water pump, read the entire procedure. This will help avoid balance shaft chain re-timing and ensure proper sealing.

1. Install a NEW water pump O-ring seal.

Important: A guide pin can be created to aid in water pump alignment. Use a M6 m x 6 mm stud. Thread the pin into the water pump sprocket.

2. Using the guide pin, align the pin with the water pump holding tool.
3. Position the water pump against the engine block and hand tighten the water pump bolts.

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Thursday, September 12th, 2019 AT 10:36 AM

PACKERS27

MEMBER
187 POSTS

Wow! So I guess my next question is, could the car possibly have jumped time and created this problem?

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Thursday, September 12th, 2019 AT 11:26 AM

ASEMASTER6371

MECHANIC
52,797 POSTS

What is the problem?

Roy

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Thursday, September 12th, 2019 AT 11:45 AM

PACKERS27

MEMBER
187 POSTS

Losing coolant rapidly. I have to refill overflow tank every 3 days. Coolant is coming from the area around the tensioner but its hard to tell exactly where. I know it's a water pump. As for the codes, I get a 02 sensor which I knew about and a random misfire (which could be associated with the O2 failing) Also a lean code. The car idles rough.

Also, I cant get the A/C compressor to stay on longer than a second without cutting off. I need to check the Freon. No cool air but if you drive a while you can feel the air cool just a little bit but not enough to cool it off.

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Thursday, September 12th, 2019 AT 6:36 PM

ASEMASTER6371

MECHANIC
52,797 POSTS

Okay, to be sure, I would do a pressure test to confirm. It will leak externally if it is the pump.

https://www.2carpros.com/articles/radiator-pressure-test

Roy