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Duratec water pump failure / replacement, what a PIA!


Chipster

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Wow! For all you guys that have complained about the internal water pump design, you were right!!! What a design! And that's the LONGEST darn timing chain I have EVER seen!! I am for sure going to keep doing regular coolant changes on schedule and hope for the best!

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I will say over all the 1.5 Gen is a much better version for the long haul than the 1st gen. I feel like it can just keep going and going.

I'll get back to you in about 25 years. I have a little over 110K on my Gen-1 and put on about 5-6k a year. {smile}

Edited by enigma-2
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My owners manual for my 2017 3.5L AWD Titanium says the following.

 

“Initial replacement at six years or 100000 miles (160000 kilometers), then every three years or 50000 miles (80000 kilometers).”

 

If there are so many water pump failures with 3.5L engines, why wouldn’t Ford recommend earlier coolant changes if that is an easy, cost effective way to extended the water pump life?

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Absolutely. While ethylene glycol never wears out, the other ingredients such as rust and corrosion inhibitors age and wear out. The most common inhibitors, silicates for aluminum protection, are used up faster than others. Green for example is recommended to be replaced at 24,000 mile/24 month intervals. Others are rated at 100k to 150k but that's the rating of the coolant and doesn't accout for acid, rust, corrosion and dirt buildup in the cooling system. Every system needs to be flushed at no more than 3-5 years. Three if you pull a trailer or overheat (fan failure, etc).

 

In addition to keeping the coolant in good condition, I can't help wonder how long those reporting water pump failures allowed their engines to go between oil changes. (No one ever fesses up to lax maintenance. Instead it's always Ford builds junk, etc.) Timing chain stretch is a natural part of aging, but some will slack more than others. I wonder how much the slack on the timing chain has on bearing failure (which leads to seal failure).

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