612 coolant hose failure - Ferrari Life
 
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post #1 of 19 Old 09-23-2014, 05:45 PM Thread Starter
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612 coolant hose failure

Guys,

Lost coolant suddenly on the freeway. Took the plenum off at the shop and here is a pic of the failed hose.

Any of you familiar with this ? Is there an upgraded hose available ? It's a very sharp bend and you can see the stress on it. I will replace all the hoses now that the plenum is off, but this is the only one I'm concerned about for a long term solution.

Thanks,
Shiv
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post #2 of 19 Old 09-23-2014, 05:49 PM
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The hoses under the plenum have a long history of failure on the V12's. That is a new hose so I doubt there is an aftermarket replacement yet. Look up Scuderia Rampante Innovations in Colorado and talk to Dave. He makes a line of very high quality replacement hoses. Maybe he can use yours as a sample for an addition to the line if he isn't already working on it.
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post #3 of 19 Old 09-23-2014, 07:33 PM Thread Starter
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Brian, I just dropped them an email. I've looked on both Ricambi and Eurospares and I can't find a part number or picture of that hose. It's not 207763, it's below it and it's not on the diagrams anywhere I can find.
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post #4 of 19 Old 09-23-2014, 09:12 PM
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-> SHAPED TUB Part No 199505 on
Ricambi America : Site Restricted : The Ferrari, Maserati, and Lamborghini Parts Specialists n 18

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post #5 of 19 Old 09-23-2014, 09:16 PM
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Shiv- That hose, #42 below, has been replaced with a new silicone hose, part number 207763. No idea why they redesigned the plenum water manifold to include a 180 degree bend, but there were some problems with the ones on the Maranellos clogging because they were so small. So they built in a 180 degree bend so the hose would split. Progress, no? Below the parts catalog drawing is what the 575M manifolding looks like and at the bottom is the 612 manifolding. Hoses are bigger for the 612, but not sure that is a big improvement. The new silicone hose should fix it permanently, though.

Did they move the expansion tank to the front of the engine? That could explain it.
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post #6 of 19 Old 09-23-2014, 09:57 PM
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Dont think it replaces one of the small hoses Terry. It looks like it replaces the larger (3/4 inch) aluminum pipe that ran down the valley to the back with a rubber hose that gose forward then back. It is the main communication between the coolant tank and the motor. All the others are for air return to the tank. In any event, like you said, Progress?

It is a hose Dave needs to make. It is going to be a problem now that these cars have been around a few years. If though as you say the new number is a silicone hose that is probably ok.
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post #7 of 19 Old 09-24-2014, 05:41 AM Thread Starter
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Taz,

In the picture above, I think it is not correctly labelled. The top hose is 207763, connected to the nipple and goes to the expansion tank. The lower hose with the sharp u bend is 199505 as Bay posted and Daniel @ Ricambi agrees.
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post #8 of 19 Old 09-24-2014, 07:09 AM
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Shiv- Sounds good to me.

Brian- Replacing aluminum with rubber does seem kind of strange.

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post #9 of 19 Old 09-24-2014, 07:01 PM Thread Starter
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Taz,

You can see the stress on the hose. Doesn't make sense to me.
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post #10 of 19 Old 09-25-2014, 12:13 PM Thread Starter
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From Jason @ SRI
We are considering the possibility of building a mandrel (big $) for the pre-formed hose for this same 612, but we need a better idea of the market size for the 612. In your opinion what is the size of that same market ?
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post #11 of 19 Old 09-25-2014, 01:06 PM
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Shiv- There were 3025 612s built, so 40% in the US would be around 1200. They will eventually all need it, sounds like. Plus any owners in the ROW might be interested, too.

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post #12 of 19 Old 09-26-2014, 11:42 AM Thread Starter
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From Dave:

""(already upgraded to silicon )"" means nothing to me, most of the Ferrari hoses have been and are still failing on a regular basis, 612 being no different than the earlier front 12 models. It takes far more than "silicone" to stand up to the steam these hoses are subjected to, a fact I over designed for in our coolant hoses.


199505 looks to be a pain to manufacture a forming mandrel for BUT.... with a simple mandrel bent piece of stainless tubing to replace the 180* portion.... the rest should be able to be done with our straight section hose and a few Otiker clamps, thuis making the permanent fix reasonably priced. Obviously the 180* portion of this hose is the weakest link and eliminating that with a small piece of stainless tubing, mated with our 4 ply coolant hose........ that should be a permanent fix to that problem.
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post #13 of 19 Old 09-26-2014, 02:07 PM
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Shiv- Makes sense with either an aluminum piece or an SS piece with the 180 degree bend and hose on both ends. Just makes for two extra sets of clamps. Without a bead on the ends of the pipe, would have to be really tight clamps.

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post #14 of 19 Old 09-26-2014, 07:01 PM Thread Starter
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Taz,

I wouldn't want to install a non beaded piece...that's just asking for trouble......
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post #15 of 19 Old 09-26-2014, 09:29 PM
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Shiv- Likely true.

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post #16 of 19 Old 10-25-2014, 12:03 PM Thread Starter
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Working with Dave Helms. We have a prototype in steel that was test fitted, some mods are required, then it will be constructed in aluminum.
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post #17 of 19 Old 10-25-2014, 12:04 PM Thread Starter
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post #18 of 19 Old 10-25-2014, 01:53 PM
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Shiv- That looks a lot more permanent.

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Past: Dino 246 GT 02984, 365 GTB/4 14009, 308 GTS 25125

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post #19 of 19 Old 11-16-2014, 08:59 AM Thread Starter
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The kit is ready, and will be fitted to my car this week.
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