MacMP

Hello,

Would someone with the repair manual post a “How To” for replacing the lower radiator hose on a W222?

The part number is A 222 501 51 01 64

I’ve been dealing with a slow leak for a year and finally found it where the lower hose connects to the engine. It is an odd set-up in that the hose is vertical at this point, but it is also a hose that slides into something else (perhaps where the thermostat is).

I’d be thankful for the help. I purchased the manual off eBay, yet I have fallen short of figuring out how to make it work on my MacBook.

Mac

Katie22

I dont have your vin number but I looked up the directions on a s550. It shows a curcular spring clip that engages a flange when the hose is installed. You simply gently pry the spring clip to free the hose. The directions say that if ther is a leak to replace the hose. IF you choose to replace the hose then you could simply cut it loose and pay little attention to the spring clip. remember the new one simply snaps onto the flanges.

Nice Ride

Is there anywhere to drain to do a flush on the S550? or is that hose removal the only way. Thanks Katie,

Katie22

The drain on my v12 is accesses by removing the plastic pan that attaches to bumper. There is a drain **** at bottom of drivers side radiator.

ps you need special rad fluid I don’t have the name in front of me but G40 is what I remember. It’s sold at orileys auto. Distilled water ya need as well.

seamus2154

I just took both belly pans off yesterday on my 2016 S550 looking for a leak. Saw some antifreeze on the floor after moving cars around in the garage. I thought it was the S but I could not find a leak or any fluid in the pans. BUT I did see a stain on that exact hose. The stain was on the motor side where Katie described the spring clip. IDK maybe it leaked when hot, although no fluid to be found, only the stain. With the pans off- up on the lift- it looks very straight forward and simple. Pull that spring and pull the hose at the connect should be all that is needed. What year is your car? I may order that hose and change it for good measure.

seamus2154

Well looking at the part online is showing part#14 as not just that lower hose. It does connect easily at the motor but there is a medly of hoses on the pass side radiator. I noticed they were crimped fittings. So apparently that hose connects in 3 spots and these small hoses are factory crimped, but it comes as one part.? If you google the part# it shows the diagram. Good luck

MacMP

Thanks to all.

Yes, this hose connects in four places. The point of leakage is odd, as there is a rubber gasket as part of a metal sleeve that slides inside. I believe it is this rubber gasket that failed.


My car is a 2016. Of course the warranty expired Last June... I complained of a leak while still under warranty, but they were unable to find one. I am sure this has been the problem all along as it is so small and doesn’t leave a noticeable trace until you get underneath and look up with a flashlight.

I will take a shot at changing tomorrow.

MacMP

Yes, my leak is on the backside/engine side too. When I removed the pans today, there was actually a small drip waiting to fall and a tiny puddle of antifreeze in one pan. On prior explorations I had only noticed what looked like a little corrosion one the metal part of the hose that slides into the above. I bet you need the same hose.

seamus2154

Mine is a 2016 also 41,000 miles. Yep, thats exactly where the stain/corrosion is! I'll bet that one clamp will be the big PITA and the other 3 spring clips will be easy. Funny not one drop in there only the stain. I'm going to order the part and do it while its cool here. Do you know if the 4 matic hose the same as the RWD?? Thanks!
Good luck tomorrow, give an update on how it went.

MacMP

There was only one part listed for all 2015 - 2017. That is all I know.

konigstiger

Same: 2225015101 or 222501510164

seamus2154

Thank you my friend!

MacMP

Mission accomplished. It took about 2.5 hours, but I move deliberately and have nerve damage that leaves my left hand with about 10% of normal strength/dexterity. Your time may vary.

Steps:

Drain radiator through drain spout.
Remove lowest point of the hose you are replacing to minimize fluid spillage.
I also removed a few other hose ends to ease access to the PITA end of the new hose.
Lubricate the rubber gasket (I used high temp synthetic grease).
Clean all points of attachment for hose ends.
Reattach all hoses, including the new one.
Have 2 to 3 gallons of fresh antifreeze on hand (I used about 9 quarts)
Gert all air out of coolant system.
Drive, and then top off coolant.

Easy peasy, but rather messy.

seamus2154

Good stuff, thanks for posting!!!

chassis

@MacMP How was working with the hose clips/clamps? The photos seem to show at least two types of clamps: wire-spring type and band-spring type, is this correct? Or something else? What tips or advice do you have for releasing and attaching the clamps? Which tool did you use to release and install the clamps?

MacMP

I used various pliers, from 16 inch long needle nose, to 8 inch needle nose, to regular slip-joint pliers for the spring clamps.

This set will come in handy to release the old hoses:

https://www.fcpeuro.com/products/4-p...products-13096

I used an 18 inch long flathead screwdriver to release the existing spring clamp at the leaking joint. It is easy to reset this clamp by pushing it into place with your fingers.

I hope this helps you.