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I’ve got a bit of aviation experience and appreciate the philosophy of replacing items before they are due to fail. Never experienced a water pump failure in my life in my Alfas and hope to keep it that way.
I can definitely appreciate the philosophy in aviation. Parts fail...people die.
 

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2015 4C Launch Edition
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What kind of car was it? I had a 335i coupe have a water pump fail. It immediately warned me of the temp, went into limp mode and told me to pull over immediately. No damage done.
It was an early VW Rabbit that was heavily moded. This was way before cars with electronics that could put them in limp mode if a problem happens. I am not a fan of relying on a cars electronics to save itself. At full chat when tracking things can go wrong in an instant.
 

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I changed my water pump when I did the 5 year service in April. There's really no right or wrong answer here...

While some of you have never had a water pump fail, I have experienced it on a VW, an Audi, and my 911. In all cases I caught a small leak before it became a problem, but for me, the decision to swap out the 5yr old one was a no brainer. Everyone comes to these type of decisions with their own experience. If I never had one fail, I probably wouldn't have changed it out.

Also, for those of you not yet at 5 years, this is what your car looks like during the service. While I love and implicitly trust my local tech, seeing my car like this almost gave me a stroke. Looking at this photo now is cool AF, but back then not so much.

Point is, replacing a cheap part while the car was already disassembled seemed like another good reason to do it.

109995
 

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Hey guys so I did my own timing belt replacement. And listen to me when you want to ensure every pulley, tensioner, water pump, and belt are replaced. I performed this maintenance on my 2015 4c with 15k miles at the time of service and there was signs of wear into the belt.

Old belt on the left and new on the right.
Would be great of someone could do a Youtube video of how to change the timing belt/waterpump.
 

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I changed my water pump when I did the 5 year service in April. There's really no right or wrong answer here...

While some of you have never had a water pump fail, I have experienced it on a VW, an Audi, and my 911. In all cases I caught a small leak before it became a problem, but for me, the decision to swap out the 5yr old one was a no brainer. Everyone comes to these type of decisions with their own experience. If I never had one fail, I probably wouldn't have changed it out.

Also, for those of you not yet at 5 years, this is what your car looks like during the service. While I love and implicitly trust my local tech, seeing my car like this almost gave me a stroke. Looking at this photo now is cool AF, but back then not so much.

Point is, replacing a cheap part while the car was already disassembled seemed like another good reason to do it.

View attachment 109995
Those panels come off pretty easy and makes it a LOT easier to work on the car. My mechanic said that the 4C is quite easy to work on for that reason.
 

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Perhaps someone can help... I have been looking up part numbers on the forum for the job, and there appears to be some discrepancy on them. Specifically around the tensioner... I have seen multiple part numbers listed... Not sure which one to order...

NoTitleU.S. PartEu PartDealerRockAutoFactoryMopardirect.com
Timing Belt (2015 – 2018)68270265AA
$68.79​
$59.17​
Tensioner (2015 – 2016)68122839-AA
$86.79​
$79.00​
Tensioner (2016 – 2018)68330825AA
$80.79​
$74.78​
Tensioner (2015 – 2018)68237772AA
$91.99​
$85.44​
Tensioner – Engine Timing Belt (Drive) (2015)68189934AA
$43.79​
$39.62​
Water Pump68259379AA
$143.79​
$135.60​
Idler Pulley68122812AA
Idler Pulley (2015 – 2018)68237454AA
$13.44​
$13.42​
Serpentine Belt (2015 – 2018)68237775AA
 

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Perhaps someone can help... I have been looking up part numbers on the forum for the job, and there appears to be some discrepancy on them. Specifically around the tensioner... I have seen multiple part numbers listed... Not sure which one to order...

NoTitleU.S. PartEu PartDealerRockAutoFactoryMopardirect.com
Timing Belt (2015 – 2018)68270265AA
$68.79​
$59.17​
Tensioner (2015 – 2016)68122839-AA
$86.79​
$79.00​
Tensioner (2016 – 2018)68330825AA
$80.79​
$74.78​
Tensioner (2015 – 2018)68237772AA
$91.99​
$85.44​
Tensioner – Engine Timing Belt (Drive) (2015)68189934AA
$43.79​
$39.62​
Water Pump68259379AA
$143.79​
$135.60​
Idler Pulley68122812AA
Idler Pulley (2015 – 2018)68237454AA
$13.44​
$13.42​
Serpentine Belt (2015 – 2018)68237775AA
This is the kit I used.
 

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On my service statement receipt, the timing belt tensioner is listed as part #68330825AA. The accessory belt tensioner is part #68237772AA. Idler pulley is listed as part #68237454AA.

Timing belt is part #68270265AA. Serpentine belt is #68237775AA.

There is a small gasket behind the cam cover (battery side of engine) that I ended up needing as well. Not sure the part number but it is right here.

110783


Make sure you put the cover on correctly, with the part numbers/mercedes looking symbol facing out and visible.

110784


There is another gasket behind the vacuum pump that may also be a good idea to replace since its only around $10 I believe...

I remember when I first dropped the car off they mentioned something about initially ordering the wrong timing belt tensioner...not sure which one that was...but the numbers I listed are on my statement and should be the parts now in my car. Hopefully....!

Good luck!
 

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@Rainier G - Your car is a 2015, and that kit worked fine? It is a bit cheaper than buying the parts separately...
 

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@Rainier G - Your car is a 2015, and that kit worked fine? It is a bit cheaper than buying the parts separately...
Yeah Doc, it is the OEM kit that worked perfectly. I also ordered the OEM serpentine belt, and pump with metal impellers. Jason is a solid dude, and easy to communicate with.
 

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FFS.... water pump failure is low in high-performance applications because they are replaced pro-actively by obsessive fanatics who know why a timing belt must be changed proactive, and have been for decades... and now people can come into a thread and tell us how reliable water pumps are, based on data that is built on the backs of people who replaced the damn things.

Overheating a modern engine is way more catastrophic than it was when more iron was in play. Aluminum and overheating = hella trouble...

And again.... after 10 years, when someone does their first WP replacement, taking the poor man's route, they are saving like 10 bucks a year in maintenance with that move.

But anyone in the 'defer water pump replacement' camp should stop citing data or anecdotally referencing reliability. You cannot do the former (use data built on the back of the people being proactive), and the latter (being anecdotal) is worthless in making a case.

/end rant

(side note: when something falls into the 'whatever makes you sleep at night category', just do whatever the hell it is you need to do to sleep. Some sleep well knowing they saved 10 bucks per year... and some sleep spending 10 extra per year on something. So, choose the plan that makes you rest your head on your pillow and sleep through the night)
 

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My car was registered in March 2014.
I just had my first timing belt replacement (after 56.000 Km) @ 6.5 years.
The timing belt looked in perfect shape together with everything else around it --> I know, I should have replaced it 1.5 years earlier.

My car was also tracked (like a lot).
 
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