How I Diagnosed Faulty Water Pump 07 Ford Edge 3.5L

In this video I'll take you along as I show and explain the diagnostic process I used to diagnose my faulty water pump on my 07 Ford Edge 3.5L.

When I first got the vehicle for diagnosis it was running very poorly. It had no power and seemed to misfire a bit. The check engine light was on with code P0016 "Cam crank correlation" stored in the PCM. I checked the coolant and the oil. The coolant level was way down and the engine oil was way overfilled and had coolant in it.

Sometimes when there is evidence of coolant in the oil it could mean that a head gasket is blown or that the engine has a cracked head or block. It could also mean that coolant could be entering the engine oil through other components, like an oil cooler if you vehicle is equipped with one. However, in my experience, it is not typical to see these kinds of faults on the Ford 3.5L engine that is used on the vehicle shown in the video. I typically see that coolant gets into the engine oil due to a leaking water pump. With the coolant being low and code P0016 set it made sense that the water pump was shot and leaking coolant into the engine. (The water pumps on these Ford 3.5L are timing chain driven and mount behind the timing cover.) If the water pump bearing goes out this could cause the water pump pulley to ride a bit crooked in the timing chain drive throwing the timing off a bit, thus the code P0016.

Armed with this information I felt confident enough to tear down the engine to point of failure by taking the timing chain cover off the engine to inspect the chain and water pump. Once I got into it my suspicions were confirmed. The water pump pulley bearing had gone out. The water pump was leaking coolant and because the pulley was crooked just a bit it was throwing the valve timing off causing the code P0016.

Now, I'm in the process of replacing the water pump, primary timing chain, and the primary timing chain tensioner. I'll have links of "how to" videos for this repair posted in this description whenever they become available.

Note: There are two weep holes that the water pump can leak from. One is discussed in the video and is typically the one that leaks. The other weep hole weeps into the intake valley under the intake.

Note: This is not necessarily a "how to" video. While it does contain a lot of good information in it and can be useful to you for diagnosing you own vehicle it may not lead you in the right direction. What is outlined in the video is the diagnostic process I used to diagnose the vehicle featured in the video. This may not be what is wrong with your vehicle. Experience is very useful when tackling a task such as the one shown in the video. You also must have an repair manual suited for the vehicle you are working on. Repair your vehicle at your own risk.

Warning! Always wear safety glasses or goggles and protective gloves. I did not wear gloves in this video. That does not mean it's OK not to wear gloves. Nitrile gloves work great.

Here is a link to a video made my Scotty Kilmer where he talks about 3.5L water pump leaks. It was uploaded just a few weeks after my video was uploaded. He speaks about it for the first 1.5 minutes of the video. I thought it was interesting. Here is the link: https://youtu.be/U9r-dV5Zc6A

DISCLAIMER
Barbour's Auto Help is not responsible for any damage or personal injury incurred in the process of performing any auto repairs done by you the viewer. Automotive repair is extremely dangerous. Repair your vehicle at your own risk. It is the viewers responsibility to verify all information and procedures as outlined in YOUR REPAIR MANUAL AND OWNERS MANUAL FOR YOUR VEHICLE. Owning and using a repair manual suited for your vehicle is essential for correctly and safely performing ANY repair to your vehicle. Always wear safety glasses and heed all instructions for use applicable to any piece of equipment you may use. Due to circumstances out of the control of Barbours Auto Help, Barbours Auto Help makes no guarantee that by the use of the information given in this video a quality repair will be made. Barbour'sAutoHelp makes no guarantee that the information provided is totally complete, syncronized and accurate. Verify everything using an appropriate repair manual.

Repair your vehicle at your own risk! Barbour's auto help does not guarantee a proper repair using these techniques.