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Ok, I received my switch today from Porsche. This is the smaller thread switch with part # 997-341-964-90 calibrated for 13 Bar.
I can confirm the following: The thread size is 1/8 BSPP. It is NOT a 1/8 NPT thread as it has no taper.
The part # stamped on the switch is just 405903 which does not match anything in the suco catalog, although it shares the 5903 sequence of numbers from the larger 1/4 BSPP switch, which is Suco part # 140459032009.
My factory switch has the same 405903 part # stamped on it as the replacement I just received, so it doesn't look like there was a part # change, unless I received 13 year old stock (which I guess is possible).
Here is the new box and switch.
The "13" stamped above the part # refers to the calibration to 13 Bar pressure
Here is switch screwed into a 1/8 BSPP female adapter.
And lastly, here is another thread diameter measurement of the major thread size. My reading is within the margin of tolerance for 1/8 BSPP thread.
Happy to answer any other questions or take additional measurements if needed.
The new switch we received has the complete part number engraved on it-you may indeed have an old stock that was sitting on a shelf.
What I suggest, is to contact Eric at Suco in Fl by email, and ask to order the switch you have, and explain it's hard to obtain the factory part number-and if it's ok to ship the old switch either there or to the factory in Germany to make sure. Or maybe include your picture witch the description of the thread and see if that's enough to identify it. Since it's somewhat a sensitive situation disclosing that it's used in P-cars(in my opinion), that the route I would take. My initial contact was with Mr. Weiss in Germany, head of International sales.
I'm looking at the site now, and there are other contacts:
An email to both both of them would be a good idea, explaining the group already bought a batch of the other ones, delivered to the Boca Raton FL US distributor. They may authorize shipping direct to the factory, or maybe easily identify it with the pictures and provide the part number.
To me, that's the best route to take- as I posted, I had some initial friction with the manager in Boca Raton-part of it was that all suco emails went to my spam folder, and I didn't see the first answer until I looked in my spam folder.
Once I picked up the switches and said thanks, I said there might be another order-he said ok, but that they don't sell to the public.
So in my opinion, emailing the manager would be best with the correct part number, and contacting the emails above to confirm which one it is might be best.
Aside from this, there are 2 other switches-the 1 or 1.5 Bar one next to the 13 Bar one that malfunctions, and the other one which I believe is the18 Bar relief switch, so in the future more orders might be needed.
Also, it hasn't been determined yet who else needs the small thread 13 Bar switch- aside from me, there were 9 buyers, some bought an extra switch and one bought 3 switches. So there might be others needing the small version, only determined once they remove their old one-
Also, please post on your new switch and how it functions. Last night I did yet one more test, my LIFT light comes on in an almost instant 5 seconds 👍
JB
Just popped in the new ‘964’ switch. The lift light on the dash definitely appears faster now. My old switch was working fine but it would be 1-3 seconds after the lift was raised before the lift light would come on. Now it’s instant as it reaches the top. I’ll keep the old switch as a spare since it’s still functioning.
I spoke with Suco. They no longer make the 1/8 BSPP size. This explains why both the ‘964’ and ‘967’ Porsche part # switches have 405903 stamped on them even though they have different thread size. Suco changed from 1/8 to 1/4 BSPP on this part number. Guys with 1/8 thread lifts have two options. Pay the Porsche tax and get the switch from a dealer while they are still available or use the new version with larger thread and a 1/4 to 1/8 reducing adapter. It will cause switch to sit about 1/2 inch from the valve body but there is enough slack in the wiring to make it work.
can someone let me know how to go about getting one of these switches? car is a 2011 (November 2010 production), and unsure if the FAL unit is original or not.
Currently, FAL works but it has the same issue detailed here where occasionally "Lift" doesn't show in the cluster (sometimes it takes a while, sometimes it doesn't come on at all), thus it won't lower until 40mph or so. Would be nice to get this fixed.
I replaced my switch about a month ago from the group buy. All worked well and now I'm back to the same symptoms. Will occasionally work, but more often don't get the LIFT to appear in dash. Seems to be when it's hot it doesn't function as it should.
Originally Posted by lawrence1
can someone let me know how to go about getting one of these switches? car is a 2011 (November 2010 production), and unsure if the FAL unit is original or not.
Currently, FAL works but it has the same issue detailed here where occasionally "Lift" doesn't show in the cluster (sometimes it takes a while, sometimes it doesn't come on at all), thus it won't lower until 40mph or so. Would be nice to get this fixed.
I replaced my switch about a month ago from the group buy. All worked well and now I'm back to the same symptoms. Will occasionally work, but more often don't get the LIFT to appear in dash. Seems to be when it's hot it doesn't function as it should.
Maybe try sticking some sort of heat sink over the switch? I discussed it earlier in this thread with JB.
Try disconnecting the lines at the struts. Careful with the copper washers on the banjo bolts. With the front wheels up, run the lift to flush the lines just in case. You can hear the air if pump is working fine-I suspect heat and humidity is a problem, I don't use mine in the hot humid summer here-
Also, when you installed the new switch, did you use the aluminum washer and torque it down correctly? I tightened by hand, don't think there are torque specs. But of course there is a danger in over tightening, the block is aluminum.
Someone could organize another group buy from Suco in FL by contacting Eric. As I recall the minimum quantity was 5 of them.
But as mentioned I was told they don't like to sell to the general public and made an exception for me after I spoke to Mr. Weiss in Germany.
Other people might have made an order since this is a public forum, and I really hope the bridge wasn't burned. It appears Suco in FL is geared for industrial high volume sales only. This is not a parts store with a retail front and they made this explicit the first time I contacted them a long time ago.
So I would send them a polite professional email asking if it's still possible to order some-
Maybe try sticking some sort of heat sink over the switch? I discussed it earlier in this thread with JB.
Mine has been working flawlessly, "Lift" light comes on in less than 5 seconds. But since summer swamp weather arrived I purposely haven't used mine, will wait a few months 😂
Mine has been working flawlessly, "Lift" light comes on in less than 5 seconds. But since summer swamp weather arrived I purposely haven't used mine, will wait a few months 😂
Im starting to come to the conclusion that this fault is environment related, as living here in cold and wet UK, I’ve never experienced this issue. Touch wood!
05-10-2023, 05:38 PM
