New 12C owner here as of two weeks ago and hardcore DIY, including fabrication (welding TIG / MIG), wiring, building hotrods.

First Mc project was to replace the accumulators. I worked slowly and carefully including disassembling the frunk. Took about 4 to 5 hours, including a trip to pickup Pentosin 11S fluid. And maybe an hour getting the car up on my lift. Managing the doors between lift posts and low clearance for the arms is a pain. I'm working to figure this out with a ramp made of 2x10s, so the car can sit deeper between the lift posts.
Both rear accumulators were blown.
I didn't do anything special to bleed. Self bled in a very short amount of time, if not instantly. The ride quality is tremendously improved in normal handling setting (of course).
Super happy with this car. One of these days I'll remove the front bumper and do the headlights, which show some beginnings of light mold.
Also, Thanks to XPRD for quick turnaround on accumulator parts.
And for McMedics on PPI.
Cheers,
Doug

 

I will have more accumulators next week. @DW SD nice post and I appreciate the endorsement!

XPRD

 

BTW - one more comment. I ended up grinding down a backup 7/8" (very close to 22mm) open end side of a combination wrench. Probably now 3/16" thick. This wasn't really necessary. I might have needed a bit of grinding, but not much. Just use a new accumulator as a gauge for the hex thickness. If your wrench head is wider than where the threads begin, grind accordingly.
Doug

 

does the screw drivers inserted show how bad they were ?

 

yes, when the screwdriver goes all the way in that shows they have completely failed.

 

I actually have something like that at my store


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Anyone have a mini write up on getting to the accumulators on a 650s? Seems like this thread is all over the map…12c, 720, can’t figure out which is which….

 

believe the 650 ones for front are located up front in trunk liner where as on 720s are all located on each corner

 

On my 2015 650s, all accumulators are located in the wheel wells…you can visually see the fronts without even removing the front wheels….lesson learned for me that just pulled the front boot and battery …doh

 

must just be 12c with em in front trunk by battery then

 

This is good news.

 

Unfortunately it seems getting these accumulators made for us to a similar or better spec is proving almost impossible. I've exhausted almost all manufacturers in Europe. Half of them have had or still have deals with McLaren so don't want to look at it for obvious reasons - and of the remaining they either have no capacity right now or don't want to go near the project because of it being for automotive use (increased liability etc.).

I will try in Taiwan, apparently they have some good manufacturers.

 

I have someone who found some, but had supply issues. Hes working on another solution, still nothing yet.

 

Good to know. Makes our 720S easily serviceable. Makes for good resale value too.

 

I need to do mine but they cost a freaking bomb

 

I'm lost...ppl commented they are ez to take out and others are saying it's more difficult and those that did them were lucky? Will u need to bleed the steering fluid or can I just replace all 4 units and its done? Why is mclaren charging 3k if it's that simple?

FYI this is for 2012 mp4 12c if that helps.

 

I'm lost...ppl commented they are ez to take out and others are saying it's more difficult and those that did them were lucky? Will u need to bleed the steering fluid or can I just replace all 4 units and its done? Why is mclaren charging 3k if it's that simple?

FYI this is for 2012 mp4 12c if that helps.

Rear is very easy, front take some time but take out frunk,battery then you see ackumulators.
Change, refill fluid and start up car.
Check fluid one more time
Do full left and right turn 10-20times and even change suspension normal,sport,track some times.
Done!


Skickat från min iPhone med Tapatalk

 

Great Thread

 

Contact Thorney motor sports in UK cost me $1040 for 4 with shipping and I had them in 3 days
Dealer wanted 2900 for 4

my only issue is how to remove the battery without having the alarm go off?
I removed the plug first then the negative and the battery started going off and I could T get it to stop for like 20 min… 🤦🏻‍♂️
the rears took 20 min each and took me 20 min to get to the battery hahaha but now im
Stuck

 

Ive got the louder alarm on mine as well and it almost blew my ears out lol

 

I'm looking to replace my accumulators soon, anybody know a good source to get them from? Reached out to XPRD and have found leads at FF Performance as well as ExoticAutoParts.

Anyone have experience with either FF Performance or ExoticAutoParts.co?

 

I have 12C accumulators in stock, all others it's a waiting game right now and we've been waiting months .

 

I know McMedics can get OEM parts, reach out to either Sean or Kevin.

 

Thorney will also ship worldwide.

 

Nothing says get it in a month like international shipping.

 

404 | HYDAC

www.hydac.com

 

With the right equipment, do the refill by yourself… HYDAC is the producing company for the McLarens accu‘s

 

The same (or basically same ) system was used by Citroen, they introduced the hydraulic suspension in the 1950’ …. until today’s cars like the C5.
They worked with the spheres or accu’s und a great way, and some Citroen specialists do the refill of spheres too

 

Online p0 calculator for hydraulic accumulators | HYDAC

Measure the charging pressure of your hydraulic accumulator quickly & easily ✔︎ Use the reference temperature or the current accumulator temperature ✔︎ Try it now.

www.hydac.com

 

Just ask the local McLaren dealer. I have one I purchased to be looked at, which I could sell you cheap. But you'll need another three.

 

We stock a huge selection of McLaren maintenance and repair parts. Always in inventory ready to ship!

CLICK HERE >>> www.SupercarGarageATL.com


Kevin P
Supercar Garage ATL - The McLaren Specialist
770-284-0172
Kennesaw GA
* Home of the flying McMedics... The only mobile McLaren Specialist! -We come to you!

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